-2- 



not be fed to dairy cattle. Endrin may be used in this case, provided label re- 

 strictions are followed. 



Black cutworms : These insects continue to be a problem on small corn. 

 With the cool wet weather and large acreage of late-planted corn, conditions are 

 favorable for increased damage. Most of the worms are near the soil surface, and 

 some are feeding just above the ground because of wet conditions. For the next few 

 weeks, observe corn in low spots in fields for signs of cutworm damage. If replant- 

 ing is necessary, apply 1 pound of dieldrin, 3 pounds of toxaphene or 2 pounds of 

 aldrin or heptachlor per acre before planting the field again. Make a broadcast 

 application, and disk the material into the soil immediately. If stands are still 

 worth saving, apply 1/2 pound of cf.ieldrin, 1/4 pound of endrin or 3 pounds of 

 toxaphene per acre as a band spray directed at the base of the plants. Use as much 

 water per acre as possible, and cultivate immediately, throwing dirt around the 

 base of the plants in order to cover the insecticide. Cultivation may not be needed 

 for good results if the soil is exceptionally wet at the time of treatment. 



Fields in the west southwest section and in other areas that have water 

 standing between the rows and are too wet to get through with ground equipment 

 could probably be treated successfully by air if conditions are critical. The same 

 insecticides should be used. 



Wireworms : Scattered reports of wireworm damage to corn were received 

 this week. These insects drill holes in the stalk just below ground level. The 

 center of the damaged plant wilts, and often the entire plant dies. If the field 

 is to be replanted, apply 2 pounds of aldrin or heptachlor per acre broadcast, and 

 disk it in immediately. In infested fields that will not be replanted, apply a 

 bend spray, use as much water as possible of either insecticide and aim at the base 

 of the plants. Cultivate immediately, throwing as much Boil as possible at the base 

 of the plants where the insecticide is deposited. 



Armyworms ; The weather of this past week has favored armyworm develop- 

 ment and retarded the development of diseases and parasites that attack this pest. 

 These insects are appearing in rank growth of wheat and in grass pastures. They 

 are readily controlled in wheat with 1/k pound of dieldrin or 1 1/2 pounds of 

 toxaphene per acre. Usually it takes 1 to 3 days for results to beccme apparent. 

 Do not harvest the grain for 7 days after treatment. If treatment becomes neces- 

 sary in grass pastures to protect the pasture, or to prevent migrations to adjacent 

 corn fields, use 2 pounds of methoxychlor per acre. Methoxychlor will prevent the 

 worms from feeding, even though actual kill is poor. When using methoxychlor, allow 

 7 days to elapse between treatment and harvest or pasturing. 



Bean leaf beetle : Tan, red or green beetles with black spots on their 

 backs are feeding on beans. The leaves ehow irregular holes. If damage is severe 

 and plants show signs of dying, apply l/4 pound of dieldrin, 1 l/2 pounds of 

 toxaphene or 1 1/2 pounds of DDT per acre. 



Leafhopp ers: These tiny wedge-shaped green insects are ccmmon in alfalfa 

 fields in a haul "Letween a line from Watseka to Quincy and Danville to St. Louis. 

 The nymphs may feed extensively on second-growth alfalfa, sturting the plants and 

 turning the leaves yellow. If adults were especially numerous at first cutting, 

 it may be profitable to apply 1 pound of methoxychlor per acre when the new growth 

 is k-6 inches tall. 



