Using the soybean field as an example, the question was asked how one would randomly check the field for insects and insect damage. Three methods were discussed. One was the zigzag method where one would walk the field in a "M", "W" or "Z" pattern. Another method was the perimeter or square method, where one would walk examining the edge of the field. A third method would be to scout a specific area, like a low area, for nematodes or black cut worm. This specific soybean field is in the reproductive stage setting pods. If the temperature is in the 90 to 95 degree range the top soybean flowers can abort, reducing the harvest. The beans are usually three in a pod, but on occasion can have four or so called "4 podders".
With the plentiful rainfall the field corn has grown and currently is looking well. Since this is not BT corn the corn borer damage mentioned in the last few weeks may become a problem as the season progresses. The corn ear was removed from one husk today and the milk line from full pollination was displayed. The corn plant will shut down with temperatures in the high 80's.
The various soybean fields are showing insect damage from grasshoppers and beetles. Some of the Jimson weed noted last week has been sprayed, and is dying. Other Jimson plants in the field have not been sprayed.
In the demonstration plots the giant pumpkin plants are growing by leaps and bounds. A wood pallet was placed under one pumpkin yesterday, keeping it away from soil borne diseases. It's a challenge keeping the pumpkins from insect damage and disease. The broomcorn is growing tightly together and is showing a little nitrogen deficiency. The millet looks good. The bell peppers and hot peppers are showing bacterial leaf spot.
Below is the weekly summary for the insects caught in the four insect traps. Many beetles were caught this week.
Trap 1 (Black Cut Worm) – 9 – Japanese Beetle, 1 each June bug, chafer beetle, ground beetle, lady bug, beetle specie.
Trap 2 (European Corn Borer) - 9 – click beetle, 1 each earwig, katydid, chafer beetle, hymenoptera.
Trap 3 (Fall Army Worm) - 5- lightening bug, 3- lady bug, 2 each click beetle, chafer beetle, 1 each true army worm, fall army worm, bumble bee, beetle specie, coleoptera ssp.
Trap 4 (Corn Ear Worm) – 4 - oriental beetle, 2 - click beetle, 1 - chafer beetle.
Notes compiled by John Siemanowski
