Saturday, June 21, 2014

IPM Notes from June 19, 2014

The sweet corn is in leaf stage 5. As was noted last week the various weeds in the sweet cornfield are now taller and will become more difficult to manage if not sprayed with a pesticide soon. One needs to know what the weeds are, and then use the proper pesticide or pesticide combination on them. The predominate weeds are curly doc, jimson weed, velvetleaf and lambs quarter. Also, the sweet corn has different heights. This is due not so much to the different varieties being grown, but more so to standing water in the lower field levels from last week's rain.

The field corn is in leaf stage 6. It is past the milk stag and into the doe stage. The field corn shows some window paining from the cereal leaf beetle, but looks very good. The field corn was sprayed with nitrogen on Wednesday, the day before.

The alfalfa field was cut once already this season and will be cut this weekend for a second time. Usually alfalfa is cut when about 10 percent of its flowers are in bloom.

The wheat field still has moisture issues as it continues to dry down. The wheat field also contained many mature cereal leaf beetles.

The popcorn was recently planted this past week and will be the red and yellow variety.

The demonstration plots are looking fairly well, but there are a few issues. The pepper plants are suffering from too much water and perhaps too many woodchips from the mulch used last year and this year. The plants are showing leaf drop and a much lighter leaf color. They were sprayed last weekend with a mixture of one gallon water and one tablespoon epsom salts (magnesium). They were also fertilized today as well. The strawberry plants showed some powdery mildew, which may have come from the straw (wheat) that was used. The hop plants showed some tent caterpillars.

Below are the summaries for the insects caught in the three insect traps.

  • Trap 1 (Black Cut Worm) – 3 black cut worm.
  • Trap 2 (Fall Army Worm) –2 flies of the diptera species
  • Trap 3 (European Corn Borer) – 1 each of European Corn Borer and chaffer bug.