Fields still wet; few insect problems

This information was summarized from a May 24 teleconference with ISU extension field specialists in crops.

  • Most areas reported only a couple of half days up to 2 days of planting progress this past week due to wet fields and up to 3 inches of rainfall that occurred in some areas of the state. Flood cleanup and crop damage assessments continued in the northeast and east central areas. Replanting will occur in some of these areas.
  • Scattered reports of bean leaf beetle, flea beetle injury, and black cutworm cutting were discussed, but none of these insects were noted to be at treatable levels in farmer's fields. There were a couple of reports of spraying for flea beetles in seed corn fields. Scouting for these pests will continue.
  • Scattered replanting will occur because of damage caused by seedcorn maggot, wireworm, and white grubs.
  • Alfalfa harvest will continue this week. Alfalfa weevil numbers are increasing, so harvest should help to lower the populations. Regrowth will need to be checked for weevil injury (see Marlin Rice's article in the April 26 ICM newsletter).
  • The table shows estimates of the percentages of corn and soybean planted, reported by field specialists' area of the state. Up to 95 percent of corn have emerged in some areas, whereas about 40 percent of the soybeans are up (there are many soybeans left to be planted). The ranges for planting and emergence in some areas of the state are variable. The numbers in parentheses are maximum growth stages reported.
Area Corn (%) Soybean (%)
Northwest (DeJong and Weis) 60-99 (V2) 10-60 (VC)
North central (Holmes and Kassel) 95+ (V1) 15-60 (VE)
Northeast (Cummins and Lang) 95-99 (V2) 20-50 (VE)
East central (Fawcett and Schmitt) 95 (V3) 40-50 (V1)
Central (Creswell) 95 (V3) 20-25 (VE)
South central (White) 50 (V1) 25 (VC)
Southeast (Carlton and Jensen) 50-99+ (V3) 15-60 (V1)
Southwest (Olsen) 80-99 (V1) 20-40 (VE)

This article originally appeared on page 81 of the IC-482(12) -- May 31, 1999 issue.

Updated 05/30/1999 - 1:00pm