Tag Archives: Soybean

TOPEKA, Kan. — The Kansas Soybean Commission (KSC) will conduct its Annual Meeting Monday, Aug. 26, at the Kansas Soybean Building in Topeka. It is scheduled to begin at 8 a.m.

During that meeting, the commissioners will elect officers for the coming year and approve their request for proposals (RFP) for fiscal year 2021 research and education projects.

Other discussion topics will be current and future research projects, market-development activities, educational programs, and administrative items. To obtain a complete agenda or to suggest additional matters for deliberation, contact KSC Administrator Kenlon Johannes at johannes@kansassoybeans.org or call the Kansas Soybean office at 877-KS-SOYBEAN (877-577-6923).

East Central and Southeastern Nebraska Growers

On June 25, larvae suspected to be soybean gall midge were found in soybean plants at the Eastern Nebraska Research and Extension Center near Ithaca. Figure 1 shows a soybean plant with dark discoloration near the soil surface. Dissection of the plant showed orange larvae feeding within these damaged areas.

Photos were also submitted by grower Trevor Houghton showing orange larvae feeding within soybean plants near Nehawka in east central Nebraska. The discovery of these larvae already feeding within the plants closes the window on the likelihood that foliar insecticides will control soybean gall midge in this area. We suggest that growers with fields south of the Eastern Nebraska Research and Extension Center not apply an insecticide, as it is unlikely to have any effect on soybean gall midge. Low levels of emergence are still occurring at some trap locations, but numbers have declined significantly in the past few days.

Northeast Nebraska Growers

No soybean midge larvae were found in soybean plants in northeast Nebraska fields near Randolph and Belden. Insect phenological events here (e.g., corn rootworm egg hatch and adult emergence) are typically one week to 10 days behind the Eastern Nebraska Research and Extension Center (Ithaca), so it is likely that soybean gall midge adults, and possibly larvae just emerging from eggs, are vulnerable to foliar insecticides.

This is a very new pest, and we have no research-based management recommendations; however, because the midge is most frequently an issue along field edges, we have farmer cooperator studies that employ insecticide treatment around the edges of soybean fields. For example, fields receive one pass, 120-foot deep into the soybean field, with an insecticide with residual activity. The objective of such studies is to protect the field from soybean gall midge by preventing the first generation of midges from establishing along the edge of the field. Soybean fields that are adjacent to or very near fields that had high infestations of soybean gall midge in 2018 may benefit from such a foliar insecticide treatment, if application occurs within the next few days. Once most eggs hatch and larvae enter the plant, insecticide treatment will be unlikely to have an effect.

For more information on soybean gall midge in Nebraska, please see cropwatch.unl.edu/tags/soybean-gall-midge.

 Corn planting was 92% complete and the portion of the crop that had emerged was rated 59% in good-to-excellent condition as of Sunday, June 16, according to this week’s USDA NASS Crop Progress report. Soybean planting was 77% complete.

Check this page throughout the afternoon for additional highlights from this week’s report.

To view weekly crop progress reports issued by National Ag Statistics Service offices in individual states, visit http://www.nass.usda.gov/…. Look for the U.S. map in the “Find Data and Reports by” section and choose the state you wish to view in the drop-down menu. Then look for that state’s “Crop Progress & Condition” report.

Clay Patton expands on how far behind the current crops are: https://post.futurimedia.com/krvnam/playlist/crop-progress-a-story-of-too-little-too-late-6947.html

National Crop Progress Summary
This Last Last 5-Year
Week Week Year Avg.
Corn Planted 92 83 100 100
Corn Emerged 79 62 97 97
Soybeans Planted 77 60 96 93
Soybeans Emerged 55 34 89 84
Winter Wheat Headed 89 83 94 95
Winter Wheat Harvested 8 4 25 20
Spring Wheat Emerged 95 85 97 97
Spring Wheat Headed 2 NA 8 12
Cotton Planted 89 75 95 94
Cotton Squaring 19 11 21 18
Sorghum Planted 69 49 88 81
Sorghum Headed 15 14 18 16
Barley Emerged 92 86 95 96
Barley Headed 2 NA 7 12
Oats Emerged 94 87 98 99
Oats Headed 33 28 50 54
Rice Emerged 94 87 100 99

**

National Crop Condition Summary
(VP = Very Poor; P = Poor; F = Fair; G = Good; E = Excellent)
This Week Last Week Last Year
VP P F G E VP P F G E VP P F G E
Corn 2 8 31 52 7 2 7 32 52 7 1 3 18 59 19
Winter Wheat 2 7 27 51 13 2 7 27 50 14 15 18 28 30 9
Spring Wheat 1 1 21 69 8 1 18 73 8 1 2 19 64 14
Cotton 4 11 36 42 7 7 8 41 37 7 5 21 36 33 5
Barley 1 6 17 63 13 2 14 68 16 1 2 13 72 12
Oats 2 4 28 58 8 2 4 29 57 8 4 3 23 58 12
Rice 1 6 30 51 12 1 6 32 52 9 3 23 60 14

**

National Soil Moisture Condition – 48 States
(VS = Very Short; SH = Short; AD = Adequate; SR = Surplus)
This Week Last Week Last Year
VS SH AD SR VS SH AD SR VS SH AD SR
Topsoil Moisture 2 10 67 21 1 8 66 25 10 24 58 8
Subsoil Moisture 2 8 68 22 1 7 66 26 10 23 60 7

On June 14 and 15, 2019, soybean gall midge adults (Figure 1) were collected from Cass County (red dots; Figure 2). For more information on the larvae and plant injury see this UNL CropWatch article. Trap sites in Saunders and Lancaster counties are checked daily and have not shown any adult emergence.

If you have soybean fields in Cass County or Otoe County and have had soybean gall midge injury in previous years in adjacent fields, an edge treatment of an insecticide on soybean would be warranted. We ask those of you outside of areas where emergence is occurring to delay making any insecticide applications until adult soybean gall midge emergence occurs in your area. We will continue to post updates on soybean gall midge emergence as it occurs at the other sites.

Rough degree day calculations in Nebraska indicate that Ithaca, Mead, and Wahoo areas are approximately 100 degree days behind the southern Cass County sites. The West Point area is about 220 degree days behind, and the Norfolk and Concord areas are about 300 degree days behind. Recent daily accumulations are around 24 degree days per day so we are not expecting emergence for several days at the northern sites.

Growers spraying too early may not have enough residual insecticide activity when adults emerge in the area and may not be able to spray the field again in that period, depending on label restrictions, limiting efficacy and increasing the likelihood for plant injury from gall midge.

I’m in an area with soybean gall midge emergence. Now what?

Because this is a new soybean pest, we do not as yet have research-based recommendations; however, we have developed some preliminary recommendations based on our recent soybean gall midge observations. Those who have experienced significant economic losses from soybean gall midge are advised to use an insecticide with residual activity. This application should be made as soon as possible after adult soybean gall midge emergence occurs in your area. We don’t recommend making an application if a field can’t be sprayed within six days of first adult emergence of soybean gall midge.

Research is currently being conducted on the timing of insecticides relative to the emergence of soybean gall midge to determine a window of efficacy for insecticide applications. Closely related insects to this species have a very short life span as adults so we expect that all of the egg laying will be done within that time period, greatly reducing the efficacy of an insecticide application. Also, be sure to adhere to the label when applying a pesticide.

Making an Insecticide Application

Diagram showing random unsprayed (none) areas the width of boom along a field edge measuring about 50-100 ft long and 90-100 ft wide to determine if any efficacy was achieved with an insecticide application.
Figure 4. Diagram showing random unsprayed (none) areas the width of boom along a field edge measuring about 50-100 ft long to determine if any efficacy was achieved with an insecticide application.

For your benefit, it’s best to not spray in two to three areas along the edge of the field (50 – 100 feet long and 90-120 feet wide, depending on the length of the boom) to determine whether the insecticide worked. If you’re in Nebraska and need assistance with evaluating damage later in the season, contact Extension Entomologists Justin McMechan (402-624-8041) or Tom Hunt (402-584-3863). Figure 4 provides a visual demonstration of what sprayed and unsprayed (none) might look like along a field edge.