Released July 26, 2024

Jennifer Otani
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Week 12

Welcome to Week 12 for the 2024 growing season! This week includes:
• Weather synopsis (for July 8-14, 2024)
• Weather synopsis (for July 14-20, 2024)
• Aphids in field crops
• Canola flower midge scouting
• Bertha armyworm
• Diamondback moth
• Lygus bug monitoring
• Grasshopper
• Provincial insect pest report links
• Crop report links
• Previous posts

Catch Monday’s Insect of the Week for Week 13 – What’s eating my crop? Swede midge

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Questions or problems accessing the contents of this Weekly Update? Please contact us so we can connect you to our information. Past “Weekly Updates” can be accessed on our Weekly Update page.

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Weather synopsis (for July 8-14, 2024)

Jennifer Otani, Kelly Turkington and Tamara Rounce
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Week 12

This week’s weather summary was kindly provided by the Prairie Crop Disease Monitoring Network (PCDMN).

Last week (July 8-14, 2024), average cumulative 7 day rainfall was 5 mm (Figure 1) and was well below the previous week (July 1-7) that experienced an average cumulative rainfall value of 16.7 mm. The average 30 day (June 14 – July 14) temperature was 0.5° C warmer than long term average values. Most of the prairies reported 30 day rainfall amounts ranging from normal to above normal. A region from Saskatoon to Oyen has had uncharacteristically high rainfall; Kindersley and Oyen had greater than 250 % of normal precipitation (Figure 2). Driest conditions were observed near Edmonton and the western areas of the Peace River region. Since April 1, the 2024 growing season average temperatures have been 0.5° C greater than climate normal values. Most of the prairies have had above normal to above normal (157 %) rainfall (Figure 3).

Figure 1. 7 day cumulative rainfall (mm) observed across the Canadian prairies for the period of July 8-14, 2024.
Figure 2. 30 day percent of normal rain (%) observed across the Canadian prairies for the period of June 14-July 14, 2024.
Figure 3. Growing season percent of normal rain %) observed across the Canadian prairies for the period of April 1 – July 14, 2024.

Soil moisture conditions (top 5 cm) continue to be driest for the eastern and Peace River regions of Alberta and southern regions of Saskatchewan (Figure 4). Soil moisture values were greatest for Manitoba and the Parkland region of Saskatchewan.

Figure 4. 7 day average saturated soil moisture (% soil moisture for the surface layer, <5 cm depth) for the period of July 8-14, 2024.

Growing degree day (GDD) dynamic maps for the Canadian prairies for Base 5 ºC and Base 10 ºC (April 1-July 15, 2024) can be viewed by clicking the hyperlinks. Over the past 7 days (to July 21, 2024), the lowest temperatures recorded across the Canadian prairies ranged from -22 to 10 °C while the highest temperatures observed ranged from 4 to 33 °C. In terms of precipitation across the Canadian prairies, review the growing season accumulated precipitation (April 1-July 21, 2024), the growing season percent of average precipitation (April 1-July 21, 2024), and the past 7 days (as of July 21, 2024). Access these maps and more using the AAFC Maps of Historic Agroclimate Conditions interface.

Growers can bookmark the AAFC Maps of Current Agroclimate Conditions for the growing season. Historical weather data can be accessed at the AAFC Drought Watch Historical website, Environment and Climate Change Canada’s Historical Data website, or your provincial weather network. The AAFC Canadian Drought Monitor also provides geospatial maps updated monthly.

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Weather synopsis (for July 14-20, 2024)

Jennifer Otani, Kelly Turkington and Tamara Rounce
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Week 12

This week’s weather summary was kindly provided by the Prairie Crop Disease Monitoring Network (PCDMN).

Relative to climate normal values, average temperatures have increased over the past four weeks. The 7 day average temperature for July 14-20, 2024 was 20.5 °C and was 3.3 °C warmer than normal. Warmest temperatures were observed for northern regions of the Alberta Peace River region, eastern regions of Alberta, and southern regions of Saskatchewan (Figure 1).

Figure 1. Seven day average temperature (°C) observed across the Canadian prairies for the period of July 14-20, 2024.

The 30 day (June 21-July 20) average temperature (18.4 °C) was 2 °C warmer than average (Figure 2). Growing season (April 1 – July 20) average temperatures were 0.7 °C warmer than average (Figures 3 and 4, respectively).

Figure 2. 30-day average temperature (°C) observed across the Canadian prairies for the period of June 21 – July 20, 2024.
Figure 3. Growing season average temperature (°C) observed across the Canadian prairies for the period of April 1 – July 20, 2024.
Figure 4. Growing season average temperature anomalies (°C) observed across the Canadian prairies for the period of April 1 – July 20, 2024.

Last week (July 14-20, 2024) average cumulative 7 day rainfall was 4.4 mm (Figure 5). Most of the prairies reported 30 day rainfall amounts that were normal to above normal (Figure 6). Rainfall amounts have been above normal for the majority of Manitoba and normal to below normal for most of Alberta. Driest conditions were observed near Edmonton and the western areas of the Peace River region. Rainfall values (June 21-July 20) have been highly variable across Saskatchewan. Growing season (April 1 – July 20) precipitation has been above normal to above normal (147 %) rain (Figure 7).

Figure 5. 7 day cumulative rainfall (mm) observed across the Canadian prairies for the period of July 14-20, 2024.
Figure 6. 30 day percent of normal rain (%) observed across the Canadian prairies for the period of June 21 – July 20, 2024.
Figure 7. Growing season percent of normal rain (%) observed across the Canadian prairies for the period of April 1 – July 20, 2024.

Soil moisture conditions (top 5 cm) continue to be driest for eastern and Peace River regions of Alberta and southern regions of Saskatchewan (Figure 8). Soil moisture values were greatest for Manitoba and the Parkland region of Saskatchewan.

Figure 8. 7 day average saturated soil moisture (%) for the surface layer (<5cm)) for the period of July 14-20, 2024.

Growing degree day (GDD) dynamic maps for the Canadian prairies for Base 5 ºC and Base 10 ºC (April 1-July 22, 2024) can be viewed by clicking the hyperlinks. Over the past 7 days (to July 23, 2024), the lowest temperatures recorded across the Canadian prairies ranged from 2 to 14 °C while the highest temperatures observed ranged from 5 to 35 °C. By now, note the mapped number of Days Above 25 ºC then compare to the Days Above 30 ºC (as of July 23, 2024). In terms of precipitation across the Canadian prairies, review the growing season accumulated precipitation (April 1-July 23, 2024), the growing season percent of average precipitation (April 1-July 23, 2024), and the past 7 days (as of July 23, 2024). Access these maps and more using the AAFC Maps of Historic Agroclimate Conditions interface.

Growers can bookmark the AAFC Maps of Current Agroclimate Conditions for the growing season. Historical weather data can be accessed at the AAFC Drought Watch Historical website, Environment and Climate Change Canada’s Historical Data website, or your provincial weather network. The AAFC Canadian Drought Monitor also provides geospatial maps updated monthly.

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Aphids in field crops

Jennifer Otani, Hugh Philip, Owen Olfert and Meghan Vankosky
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Week 12

Aphid populations can quickly increase at this point in the season and particularly when growing conditions are warm and dry. Access the Provincial Insect Pest Report for Wk12 to remain alert to areas and crops suffering from aphid pest pressure.

Figure 1. Pea aphid adults (each 3-4 mm long) and nymph. Photo: M. Dolinski.

Biological and monitoring information (including tips for scouting and economic thresholds) related to aphids in field crops is posted by:
• Manitoba Agriculture (aphids on cereals, aphids on flax, soybean aphid, aphids on peas)
• Saskatchewan Pulse Growers (aphids in pulse crops or access the PDF copy)
• Saskatchewan Flax Development Commission
• Manitoba Pulse and Soybean Growers (soybean aphids: identification, scouting and management or access the PDF copy)
• The Canola Council of Canada’s “Canola Encyclopedia” section on aphids
• or check your provincial commodity group’s insect pest webpages for more detailed information.

Alternatively, several aphid pest species are described in the “Field Crop and Forage Pests and their Natural Enemies in Western Canada: Identification and management field guide” (2018) and is accessible as a free downloadable PDF in either English or French on our Field Guides page. PDF copies of the individual pages have been linked below to access quickly:
Corn leaf aphid or Rhopalosiphum maidis (Fitch)
English grain aphid or Sitobion (Macrosiphum) avenae (Fabricius)
Oat-birdcherry aphid or Rhopalosiphum padi (Linnaeus)
Pea aphid or Acyrthosiphon pisum (Harris)
Potato aphid or Macrosiphum euphorbiae (Thomas)
Soybean aphid or Aphis glycines (Matsumura)
Turnip aphid or Lipaphis erysimi (Kaltenbach)
Sugar beet root aphid or Pemphigus betae Doane
Russian wheat aphid or Diuraphis noxia (Mordvilko)

Over the years, both the Weekly Updates and Insect of the Week have included aphid-related information but also important natural enemy details to support in-field scouting. Review the list below so pest and beneficial insects can be distinguished readily when scouting fields:
Aphidius wasp (Insect of the Week; 2015 Wk15)
Aphids in canola (Insect of the Week; 2016 Wk13)
Aphids in cereals (Insect of the Week; 2017 Wk09)
Cereal aphid manager APP (Weekly Update; 2021 Wk07) that presently is available only for iOS
Ladybird larva vs. lacewing larva (Insect of the Week; 2019 Wk18)
Ladybird beetles and mummies (Weekly Update; 2020 Wk15)
Lygus bug nymphs vs. aphids (Insect of the Week; 2019 Wk16)
Hoverflies vs. bees vs. yellow jacket wasps (Insect of the Week; 2019 Wk19)
Pea aphids: a persistent problem for legume growers (Insect of the Week; 2021 Wk12)
Soybean aphids and aphid annihilating allies (Insect of the Week; 2022 Wk07)
Syrphid flies (Insect of the Week; 2015 Wk16)

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Canola Flower Midge Scouting

Jennifer Otani and Meghan Vankosky
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Week 12

Scouting for canola flower midge tends to be easiest as the flowering stage of canola ends and pod development begins. Female canola flower midge lay eggs on developing canola buds and larvae develop inside the buds, resulting in galled flowers that do not open or produce pods.

Although canola flower midge does not appear to occur at densities that cause economic damage, scouting for canola flower midge will help to monitor population growth at the local scale to avoid surprises in the future. The monitoring protocol used during our survey from 2017-2019 is now available online so that everyone can scout for canola flower midge.

Check out the Canola Flower Midge Scouting post from Week 10 in 2023 for pictures of damage caused by this insect and to see a map of canola flower midge distribution.

Compare canola flower midge damage to the closely related Swede midge which was featured as Wk12’s Insect of the Week.

Access the Provincial Insect Pest Report for Wk12 for updates for this economic insect pest.

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Bertha armyworm

Jennifer Otani and Meghan Vankosky
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Week 12

Weekly Pheromone-baited Trapping Results – Early season detection of bertha armyworm is improved through the use of pheromone-baited unitraps traps deployed in fields across the Canadian prairies. Access the Provincial Insect Pest Report for Wk12 for updates for this economic insect pest.

Remember: in-field scouting is required to apply the economic threshold to manage both this pest and its natural enemies. Use the images below (Fig. 1) to help identify moths from the by-catch that will be retained in the green phermone-baited unitraps.

Figure 1. Stages of bertha armyworm from egg (A), larva (B), pupa (C), to adult (D). Photos: J. Williams (Agriculture and Agri-Food Canada).

Refer to the PPMN Bertha armyworm monitoring protocol for help when performing in-field scouting or review the 2024 Insect of the Week featuring bertha armyworm. Also scan over the 2019 Insect of the Week featuring bertha armyworm and its doppelganger, the clover cutworm! 

Biological and monitoring information related to bertha armyworm in field crops is posted by the provinces of ManitobaSaskatchewanAlberta and the Prairie Pest Monitoring Network. Also, refer to the bertha armyworm pages within the “Field Crop and Forage Pests and their Natural Enemies in Western Canada: Identification and management field guide” (2018) accessible as a free downloadable PDF in either English or French on our new Field Guides page.

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Diamondback moth

Jennifer Otani and Meghan Vankosky
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Week 12

Scouting and pest management for diamondback moth depends on in-field counts of larvae per metre2! This means plants need to be pulled and tapped off to assess the number of larvae! Use Figure 1 below to help identify the different stages of the diamondback moth.

Figure 1. The life stages of the diamondback moth (Plutella xylostella), which can have multiple generations per year. Photos: AAFC-Saskatoon-J. Williams.

The economic threshold for immature and flowering canola is 100-150 larvae per metre2.

Access the Provincial Insect Pest Report for Wk12 for updates for this economic insect pest.

Biological and monitoring information for DBM (including tips for scouting and economic thresholds) is posted by Manitoba AgricultureSaskatchewan Ministry of Agriculture, Alberta Agriculture and Irrigation, and the Prairie Pest Monitoring Network.  Also, refer to the diamondback moth pages within the “Field Crop and Forage Pests and their Natural Enemies in Western Canada: Identification and management field guide” (2018) accessible as a free downloadable PDF in either English or French on our Field Guides page.

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Lygus bug monitoring

Jennifer Otani, Hector Carcamo and Meghan Vankosky
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Week 12

On the Canadian prairies, lygus bugs (Heteroptera: Miridae) are normally a complex of several native species usually including Lygus lineolaris, L. keltoni, L. borealis, L. elisus although several more species are distributed throughout Canada. The species of Lygus forming the “complex” can vary by host plant, by region or even seasonally.

Lygus bugs are polyphagous (i.e., feed on plants belonging to several Families of plants) and multivoltine (i.e., capable of producing multiple generations per year). Both the adult (Fig. 1) and five nymphal instar stages (Fig. 2) are a sucking insect that focuses feeding activities on developing buds, pods and seeds. Adults overwinter in northern climates. The economic threshold for Lygus in canola is applied at late flower and early pod stages.  

Recent research in Alberta has resulted in a revision to the thresholds recommended for the management of Lygus in canola. Under ideal growing conditions (i.e., ample moisture) a threshold of 20-30 lygus per 10 sweeps is recommended. Under dry conditions, a lower threshold may be used, however, because drought limits yield potential in canola, growers should be cautious if considering the use of foliar-applied insecticide at lygus densities below the established threshold of 20-30 per 10 sweeps. In drought-affected fields that still support near-average yield potential, a lower threshold of ~20 lygus per 10 sweeps may be appropriate for stressed canola. Even if the current value of canola remains high (e.g., >$19.00 per bu), control at densities of <10 lygus per 10 sweeps is not likely to be economical. Research indicates that lygus numbers below 10 per 10 sweeps (one per sweep) can on occasion increase yield in good growing conditions – likely through plant compensation for a small amount of feeding stress.

Figure 1. Adult Lygus lineolaris (5-6 mm long) (photo: AAFC-Saskatoon).
Figure 2. Fifth instar lygus bug nymph (3-4 mm long) (photo: AAFC-Saskatoon).

Damage: Lygus bugs have piercing-sucking mouthparts and physically damage the plant by puncturing the tissue and sucking plant juices. The plants also react to the toxic saliva that the insects inject when they feed. Lygus bug infestations can cause alfalfa to have short stem internodes, excessive branching, and small, distorted leaves. In canola, lygus bugs feed on buds and blossoms and cause them to drop. They also puncture seed pods and feed on the developing seeds causing them to turn brown and shrivel.

Scouting tips to keep in mind: Begin monitoring canola when it bolts and continues until seeds within the pods are firm. Since adults can move into canola from alfalfa, check lygus bug numbers in canola when nearby alfalfa crops are cut.

Sample the crop for lygus bugs on a sunny day when the temperature is above 20 °C and the crop canopy is dry. With a standard insect net (38 cm diameter), take ten 180 ° sweeps. Count the number of lygus bugs in the net. Sampling becomes more representative IF repeated at multiple spots within a field so sweep in at least 10 locations within a field to estimate the density of lygus bugs.

How to tell them apart: The 2019 Insect of the Week’s doppelganger for Wk 15 was lygus bug versus the alfalfa plant bug while Wk 16 featured lygus bug nymphs vs. aphids!  Both posts include tips to discern the difference between when doing in-field scouting!

Biological and monitoring information related to Lygus in field crops is posted by the provinces of Manitoba or Alberta fact sheets or the Prairie Pest Monitoring Network’s monitoring protocol.  Also refer to the Lygus pages within the “Field Crop and Forage Pests and their Natural Enemies in Western Canada: Identification and management field guide” (2018) accessible as a free downloadable PDF in either English or French on our new Field Guides page. The Canola Council of Canada’s “Canola Encyclopedia” also summarizes Lygus bugs. The Flax Council of Canada includes Lygus bugs in their Insect Pest downloadable PDF chapter plus the Saskatchewan Pulse Growers summarize Lygus bugs in faba beans.

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Grasshopper

Jennifer Otani, James Tansey and Meghan Vankosky
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Week 12

Grasshopper Scouting Tips:
Review grasshopper diversity and photos of nymphs, adults, and non-grasshopper species to aid in-field scouting from egg hatch and onwards.
● It is best to scout on warm days when grasshopper nymphs are more active and easier to observe.
● Carefully check roadside ditches and along field edges but also check the edge of the crop and into the actual field.
● Younger or earlier instar nymphs are easier to manage – visit sites every few days to stay on top of local field conditions.
● A sweep-net can ‘detect’ grasshopper nymphs, however, economic thresholds for grasshoppers are based on the number of grasshoppers per square-metre counts.
● Access the PPMN’s Grasshopper Monitoring Protocol as a guide to help implement in-field monitoring.
● Review grasshopper lifecycle, damage and scouting and economic thresholds to support sound management decisions enabling the preservation of beneficial arthropods and mitigation of economic losses.

Important – A preliminary summary of available thresholds for grasshoppers has been kindly shared by Dr. J. Tansey (Saskatchewan Agriculture) in Table 1. When scouting, compare in-field counts to the available threshold value for the appropriate host crop AND for field or ditch situations. Available thresholds (nominal and economic) help support producers while protecting beneficials (i.e., predators, parasitoids, and pathogens) that regulate natural populations of grasshoppers.

Access the Provincial Insect Pest Report for Wk12 for updates for this economic insect pest.

Biological and monitoring information (including tips for scouting and economic thresholds) related to grasshoppers in field crops is posted by Manitoba AgricultureSaskatchewan Ministry of AgricultureAlberta Agriculture and Irrigation, the BC Ministry of Agriculture, and the Prairie Pest Monitoring Network.  Also, refer to the grasshopper pages within the “Field Crop and Forage Pests and their Natural Enemies in Western Canada: Identification and management field guide” (2018) accessible as a free downloadable PDF in either English or French on our Field Guides page. Review the historical grasshopper maps based on late-summer in-field counts of adults performed across the Canadian prairies.

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Provincial insect pest report links

Jennifer Otani, John Gavloski, James Tansey, Carter Peru and Shelley Barkley
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Week 12

Prairie-wide provincial entomologists provide insect pest updates throughout the growing season. Follow the hyperlinks to readily access their information as the growing season progresses:

MANITOBA’S Crop Pest Updates for 2024 are available. Access the online July 25, 2024 report (or PDF copy). Bookmark the insect pest homepage to access fact sheets and more! Highlights pulled from the latest report include:
Aphids – Dr. J. Gavloski reported that, “Pea aphids in peas” remained a concern that resulted in “some control in the Southwest, Central and Interlake regions”. Additionally, “aphids in cereal crops are becoming more noticeable in some areas” but there also were “reports of aphid mummies (parasitized aphids), lacewings and lots of lady beetles in some fields of wheat.”
True armyworm – “True armyworms were still noted in forage grasses in the Central and Interlake regions. There were no reports of control of true armyworms over the past week, and levels of larvae may be declining as they turn to pupae. Review the cumulative pheromone trap counts in the July 24, 2024 report. Also find reports of natural enemies of armyworm in this report.
Grasshoppers– Reports that, “grasshoppers are more noticeable in crops in some areas, while in other areas grasshopper activity is mainly limited to field edges or is of less concern. There was a report of a number of dead grasshoppers clinging to the top of wheat heads (a sign of a fungal pathogen) in the Southwest region.”
Canola flower midge – “Unopened buds, a result of canola flower midge, is noticeable in some canola fields in the Northwest region.”
European corn borer – Review the report for tips to scout for egg masses in corn, hemp, quinoa, potatoes and other host crops. Access both the updated fact sheet and request to report by downloading and using the free Survey123 App.
Corn rootworm – Review the report for tips to scout for both the northern and western corn rootworm.
Bertha armyworm pheromone trap monitoring – Reports moths in “79 of 82 traps” although “counts have been low so far”. So far, the highest cumulative count reported is “290 from a trap near Killarney in the Southwest region”. Access the PDF copy of the July 25 report.
Diamondback moth pheromone trap monitoring – Trapping is complete for 2024 (as of Wk 09; access the PDF copy of the July 4 report).

SASKATCHEWAN’S Crop Production News is back for the 2024 growing season! Access the online Issue #5 report which includes sections covering pea aphids and cereal leaf beetle. Bookmark their insect pest homepage to access important information! Also access the Crops Blog Posts that released a grasshopper activity update (June 2024), announced registration for the Crop Diagnostic School 2024 but also posts help for scouting fields for wireworms (May 2024), grasshopper identification: pest or not (Apr 2024), a summary of wheat midge populations and management (Mar 2024), and a description of pea leaf weevil populations (Feb 2024).
• A brief summary of notable insect pests relayed from Dr. J. Tansey is that insecticide control has been needed to protect lentils from pea aphids. And similarly with other aphids – this past week, an increased number of reports and calls were received related to cereal aphids.

ALBERTA’S Insect Pest Monitoring Network webpage links to insect survey maps, live feed maps, insect trap set-up videos, and more. There is also a Major Crops Insect webpage. Remember, AAI’s Agri-News occasionally includes insect-related information, e.g., assessing and a description of missing pods on canola (July 22, 2024), scout for wheat midge (July 15, 2024), the right canola crop stage to spray for lygus bugs (July 8, 2024), soil moisture, wheat midge and other insect pests (June 24, 2024), scout for grasshoppers and other insect pests (June 17, 2024); how to manage stem feeding from flea beetles, keep canola bins malathion-free, scout for grasshoppers and other pests (June 10, 2024); scout for insect pests (June 3, 2024); scout for grasshoppers (May 27, 2024); flea beetle control (May 6, 2024); cereal insect pests, latest on insects in canola, and post-emergence wireworm scouting (May 13, 2024).
Wheat midge monitoring – Cumulative counts arising from weekly data are available so refer to the Live Map. So far, cumulative trap counts from 37 trap locations are reporting; 10 sites in central Alberta are “high” and in the Peace River region 22 sites are reporting “high”, 2 sites are “medium”, and 2 sites are “low” (as of July 25, 2024).
Cabbage seedpod weevil monitoring – Sweep-net count data can be reported here then the data populates the Live Map. So far, a total of 16 sites in southern Alberta are reporting; there are 14 “low risk” plus 2 “high risk” reports as of July 18, 2024).
Bertha armyworm pheromone trap monitoring – Cumulative counts arising from weekly data are available so refer to the Live Map. Cumulative trap counts from 266 trap locations are all reporting “low risk” across the province while 1 trap location near Fairview, plus 3 trap locations in southern Alberta (2 in Vulcan County plus 1 near Lethbridge) are reporting “medium risk” as of July 25, 2024).
Diamondback moth pheromone trap monitoring – Cumulative counts arising from weekly data are available so refer to the Live Map. Cumulative trap counts have been recorded from 32 reporting sites and 28 remain in the “no risk” category as of July 4, 2024). Four trap locations have caught > 25 adult diamondback moths; sites fall within the County of Grande Prairie (as of June 8, 2024), County of Warner (as of June 15, 2024), Vulcan County (as of June 15, 2024), and County of Barrhead (as of June 15, 2024).
Cutworm live monitoring map – Cumulative counts arising from weekly data are available so refer to the Live Map. 10 surveyed sites have reported from across the province, nine falling within southern Alberta and one report from the County of Grande Prairie.

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Crop report links

Jennifer Otani
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Week 12

Access the latest provincial crop reports produced by:
Manitoba Agriculture (subscribe to receive OR access a PDF copy of the July 23, 2024 report).
Saskatchewan Agriculture (or access a PDF copy of the July 16-22, 2024 report).
Alberta Agriculture and Irrigation (or access a PDF copy of the July 16, 2024 report).
• The high temperatures and lack of precipitation across large areas of the Canadian prairies for ~10 days starting on July 9, 2024, will be reflected in the above reports.

The following crop reports are also available:
• The United States Department of Agriculture (USDA) produces a Crop Progress Report (access a PDF copy of the July 22, 2024 edition).
• The USDA’s Weekly Weather and Crop Bulletin (access a PDF copy of the July 23, 2024 edition).

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Previous posts

Jennifer Otani
Categories
Week 12

As the growing season progresses, the Weekly Update topics move on and off the priority list for in-field scouting. It remains useful to keep the list at hand to support season-long monitoring. Click to review these earlier 2024 Posts (organized alphabetically):
2023 Risk maps
Alfalfa weevil (Wk 09)
Cabbage seedpod weevil (Wk 10)
Cereal leaf beetle (Wk 10)
Cicada – Rare co-emergence of broods (Wk07)
Crop production guide links (Wk 03)
European skipper (Wk 11)
Cutworms (Wk 05)
Field heroes (Wk 05)
Flea beetles (Wk 04)
Invasive insects (Wk 06)
Monarch migration (Wk 10)
Pea leaf weevil (Wk 05)
Prairie Crop Disease Monitoring Network (Wk 08)
Prairie Weed Monitoring Network (Wk 06)
Scouting charts – canola and flax (Wk 03 of 2022)
Tick tips (Wk 04)
True armyworm (Wk 09)
West Nile virus (Wk 09)
Wind trajectory summaries unavailable (Wk 01)
Wheat midge (Wk 11)

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