only . Allow 5 days between harvest for malathion, 10 days for diazinon, and 12 days 

 for methyl parathion. Carbaryl has no waiting period. 



Adult control is no guarantee that the rootworm problem will be eliminated the fol- 

 lowing year. The movement and migration of rootworm beetles from adjacent fields is 

 constantly taking place, and egg- laying continues up to frost time. 



If you want to estimate the prospects of rootworm problems next year, check the num- 

 ber of beetles and the rootworm damage during the next week or two. If you find many 

 beetles (4 or more per plant) , then there may be enough rootworms in the field to 

 cause economic losses in 1972 if the field is planted again in corn. 



SORGHUM 



Fall armyworm s. Damage to sorghum by fall armyworms was observed in southern areas of 

 the state last week. The small larvae feed on the outer leaves. The larger worms fee; 

 down in the whorls. Control is suggested when 25 percent of the plants, less than thr 

 feet in height, show whorl feeding. 



Granules are preferred, but sprays applied with ground equipment using 10 to 20 gallon 

 of water per acre with the spray directed over the whorls will provide fair to good re 

 suits, depending on the size and location of the worms. For control, use 1-1/2 pound 

 of carbaryl (Sevin) or toxaphene. For carbaryl, there is a 21-day waiting period be- ! 

 tween application and removal of grain, but none for forage. For toxaphene, wait 28 , 

 days before removing grain. Do not apply toxaphene more than once after heads start 

 to form. Do not use treated forage for silage. 



SOYBEANS 



White grubs . Damage is reported in a few soybean fields. No satisfactory emergency- j 

 control measures are available. j 



Grasshoppers . The count continues to be heavy in some areas. Migrations are occuring 

 into corn and soybeans. For control, use either carbaryl (Sevin) or toxaphene. Do noi 

 apply toxaphene to corn or soybeans to be used as forage for livestock. Do not apply 

 toxaphene near fish-bearing waters, or carbaryl near bee hives. 



HOMEOWNER PROBLEMS 



Sod webworm moths . The second- generation moths have been emerging and are laying eggs 

 in lawns. These moths are buff -colored, and have a tubular shaped body when at rest. 

 Egg-laying will continue for several more weeks. The moths are flushed from their 

 hiding places when tall grass is moved or shrubbery is disturbed. They fly in a jerky 

 fashion, a few feet at a time, then dive down to rest on a grass blade. 



Apply ample fertilizer and water the lawn to help reduce the possibility of severe 

 damage from these insects. Once started, this program must be continued to avoid 

 serious damage. If needed, an application of carbaryl (Sevin), diazinon, or trichlor- 

 fon (Dylox) --spray or granules --will effectively control the worms for a week or 

 two. An additional treatment may be needed if egg- laying continues into late August. 



Crickets . They may soon invade homes. Although there appears to be planty of cricket 

 food in the fields, some of them usually migrate. In so doing, they are attracted to 

 lights. A foundation spray of chlordane will help reduce the number that enter the 

 home. You may also want to mist spray around doorways and windows. Spray the founda- 

 tion of the house to the point of run-off with a 1 -percent chlordane spray, made by 



