/atch for armyworm migrations as your wheat begins to turn and ripen, or when you 

 low grassy areas if these are adjacent to small corn. If migration occurs, spray 

 ±ie corn as far out as the worms have migrated. Also, spray 2 to 3 rods into the 

 /heat or grassy area, as well as all over any fence row or lane through which the 

 rorms are moving. For migrations from wheat to corn, use 1-1/2 pounds of toxaphene 

 ier acre. For migrations from grass fields into corn, use 1-1/2 pounds of carbaryl 

 Sevin) per acre. Remember that toxaphene is toxic to fish and that carbaryl is 

 :oxic to bees. 



'ORAGE CROPS 



;he alfalfa weevils still need watching. In the southern section, a large number of 

 idult weevils are damaging the new growth of the second crop in fields that have been 

 :ut recently. These adults will continue to feed for another week or two before tak- 

 ing their summer siesta. Most of the insecticides used for larval control are not 

 effective against the adults. Methyl parathion is effective, but should be applied 

 inly by commercial applicators. Be sure to allow 15 days between treatment and har- 

 dest or pasturing. 



[n the central, north - central , and northern sections of Illinois, the larvae are 

 zausing economic damage in many fields of first-crop alfalfa. It would be best to 

 ;ut and remove the crop and to watch the new growth for damage. If that new growth 

 ioes not green-up within 2 to 4 days and if worms are present, apply an insecticide 

 oromptly. 



."or control, farmers making their own applications should use malathion; Imidan, a 

 aixture containing malathion and methoxychlor; or a mixture of methoxychlor and 

 iiazinon (Alfatox) . Commercial applicators can use the above materials or one of 

 the more-toxic insecticides, such as methyl parathion or azinphosmethyl (Guthion) . 



-ollow label directions for dosages, harvest limitations, and precautions. 



anall grasshoppers are appearing in fence rows, ditchbanks, grassy waterways, and 

 lay fields- -particularly in the southern section of the state. There is a greater 

 lumber of overwintering grasshopper eggs than has existed for several years. The 

 southwestern, southern, and western sections are the ones where problems are most 

 Likely. 



fiany more grasshoppers will be hatching during the weeks ahead. Hot, dry leather is 

 Eavorable for survival during the hatching period. If you notice lots of tiny 'hoppers 

 Ln grassy areas or hay fields, plan to control them before they move into more -valuable 

 zrops , such as corn and soybeans. Spray grassy areas with 1-1/2 pounds of toxaphene 

 3r 3/4 pound of carbaryl (Sevin) per acre. Use carbaryl (Sevin) on hay fields or 

 Dastures. There is no waiting period for carbaryl (Sevin). 



4ites , probably two -spotted spider mites, are damaging soybeans in the west -southwest 

 section. Hot, dry weather favors their development. Rain would tend to lessen their 

 lumber, and would allow the plants to grow out of the damage. The mites appear as 

 small, orange or black spots on the undersides of the leaves. Usually, a fine web is 

 also present. Affected soybeans show stunting, yellowing, and eventual browning of 

 the leaves. 



If damage is severe and treatment is needed, spray with 1/2 pound of azinphosmethyl 

 (Guthion) or 5/4 pound of carbophenothion (Trithion) per acre. 



these insecticides should be app l ied only by experienced operators. 



