What we’re seeing in the fields…
Posted Aug 16, 09 in Scouting
Rootworm levels are variable some fields have very high numbers and other fields have nothing.
Leafhopper levels are variable as well all areas have some but not enough to treat. A few farms have had to spray seedings and some established stands. Most of the farms are at the point where they will be or have just recently harvested third cutting.
Soybean aphid populations were high enough to spray early on but have leveled off recently. Counts have been ranging from 50-125 per plant.
What we are Seeing in the Fields
Posted Jun 15, 09 in Scouting
By Nate Herendeen and Tom Frederes
Very good populations in both seeding and corn fields. Higher than average number of fields with bird damage. Lots of wild turkey and deer.
Corn - Very few cutworm. Many weeds - annual broadleaf and annual grass seedlings, nutsedge and perennial broadleaf weeds in spots. Stands generally excellent except in “lumpy” or compacted areas. There was a lot of compaction from wet harvest last fall and early wet conditions this spring followed by long stretch of dry conditions most of May.
Alfalfa - Too many alfalfa weevil. Fortunately, hay crop silage harvest when well and most dairy farmers were ahead of the damage. Dry hay makers and late HCS harvesters suffered losses from AW feeding. First cuttings on well and moderately well drained soils had excellent alfalfa-grass yields. Somewhat poorly drained soils had winter injury on alfalfa and slower regrowth this spring as root reserves had to be rebuilt before maximum top growth could resume.
Wheat - Winter wheat planted on a timely bases (before about Oct.5) last fall is excellent. Later planted wheat had tough conditions after planting - cold and wet - and did not get a good start this spring. The straw ill be short on the later planted wheat. It was additionally stunted from the extremely dry May, the month it normally makes maximum stem elongation. Grain yields should be good, in general. Most wheat is pollinated and now is in maturation phase. We had generally dry weather for pollination so cab or Fusarium head blight should not be a major problem. We could still have bad conditions near harvest time that will create problems, but the initial infection period (bloom - pollination) was not favorable to infection. It needs wet and warm.
Cereal leaf beetle (CLB) are plentiful in wheat, but I have not seen enough to recommend insecticide. Visually, there will be some poor looking areas.
Oats - look good, very few CLB at this point. Not enough to justify insecticide, although some are putting it in with herbicide hoping it will be preventive (not a recommended practice). Oats will also be short straw in general due to prolonged dry May in this area (Niagara-Orleans).
Soybeans - generally just emerged and early stands look good. No pest problems so far, except weeds and 95+ % will be.
Scouting Your Fields For:
Posted Jun 8, 09 in Scouting
Weed populations, rescue treatment time if the dry weather caused herbicide failures.
Weed escapes in fields that were sprayed early pre-emergence in particular, have been a problem on some farms.
Corn - populations, cutworm, especially in no-till, zone-till or fields that were weedy before tillage or heavy manure.
Alfalfa - potato leaf hopper in regrowth and new seedlings. Weed control in new seedlings. Alfalfa weevils are on decline now.
Wheat - Common Armyworm (CAW), foliar diseases-rust and septoria problems, but the one of concern is scab or Fusarium head blight as it can lead to mycotoxins in the grain. Other causes are Cercospella foot rot, eyespot disease and European corn borer (ECB). ECB is usually not economic, but can cause visual concerns. With all the early corn around, I doubt if ECB will be laying many eggs in wheat. With CAW, look for ragged leaf chewing and frass on the ground. They hind under debris and rocks or in cracks during the day and come up to feed when it is cool and dark or heavy cloudy.
Oats - CLB and weeds.
Soybeans - seed corn maggot an weeds. Crusting can be a problem on compacted, high clay content soils.