-3- 



least 35 (preferably kO to 1+5) and at least 75 percent of the plants show recent 

 whorl feeding, then treatment is justified. Use 1 pound of actual diazinon in 

 granular form per acre or 1 1/2 pounds of carbaryl (Sevin) as granules. For spray- 

 ing, use the same amount of actual insecticide per acre, and direct the spray to 

 the upper third of the plant. Aerial applications should be granules, not sprays 

 or dusts. Follow the label precautions in harvesting and feeding treated corn. 

 DDT can be used as granules or sprays, but not on or adjacent to dairy farms. 



In central Illinois from 20 to 50 percent of the moths have emerged, 

 while in northern Illinois emergence is just beginning. It does not appear that 

 first-generation corn borer will be a problem in this area. 



Grasshoppers are now hatching. Hard, beating rains kill the tiny 'hop- 

 pers, but hatch will continue for several weeks and some will survive. We do not 

 expect any severe or widespread grasshopper infestation, but some localized infes- 

 tations may still be serious. The best time to control grasshoppers is while they 

 are small and still concentrated in their hibernating quarters along roadsides, 

 ditch banks, fence rows, grass waterways, etc. If control becomes necessary, 3 A 

 pound of carbaryl (Sevin), 1/2 pound of diazinon or 1 pound of malathion per acre 

 is effective. Toxaphene at 1 1/2 pounds per acre is also effective but should not 

 be used on dairy farms or adjacent to dairy pastures or hay fields. Do not spray 

 toxaphene near fish-bearing waters. Follow time intervals between application and 

 crop harvest as listed on labels. 



Bean leaf beetles may soon attack newly emerging soybeans, causing severe 

 defoliation. If control becomes necessary, apply toxaphene or carbaryl. 



House flies may soon become numerous . Plan your program now and follow 

 these three steps: Tl) Practice good sanitation; clean out fly breeding areas, such 

 as manure, rotting straw, wet hay and feed, as often as is practical (preferably 

 once a week). (2) Apply a barn spray material, such as dimethoate (Cygon), diazi- 

 non or ronnel (Korlan), to runoff on ceilings and walls of all livestock buildings. 

 Also spot-spray outside around doors and windows and along fences in the lot. Use 

 only ronnel in poultry houses. Always cover all water and feed troughs before 

 spraying, and do not spray animals. (3) You may also want to apply a supplementary 

 spray bait, using the same insecticides mixed with two parts corn sirup and one 

 part water. Other insecticide baits may be used as supplements to good sanitation 

 and barn spraying. This treatment will also control stable flies resting in and 

 around livestock buildings . 



Stored grain insects are readying themselves for the big feast of newly 

 harvested wheat. Follow these three steps to protect wheat from damage for a year 

 or more: (l) Sweep up and clean out all old grain and other debris from inside 

 and around the storage bin. (2) Apply a water-base spray of 1.5 percent premium- 

 grade malathion or 2.5 percent methoxychlor to the walls, ceiling and floor. 

 (3) Treat the wheat with a premium-grade malathion dust or spray before placing it 

 in the bin. 



The Homeowner's Insect Problems 



Sod webworm moths are emerging from larvae that survived the winter. The 

 first-generation worms, which hatch from eggs laid by these adults, are seldom nu- 

 merous enough in lawns to cause injury. It is the second-generation worms present 

 in late July and August that build up and cause damage. It is too soon to predict 

 sod webworm problems for 1966. 



