-3- 



Soybean Insects 



Leafhoppers are still abundant in soybeans. I£ needed, a spray containing 1 pound 

 of malathion per acre for soybeans will control this insect. Do not harvest as 

 forage for 1 day after treatment. 



Green worms were observed feeding in soybeans this week. These may be green 

 cloverworms , cabbage loopers , alfalfa webworms , or alfalfa caterpillar larvae. 

 Damage is not apparent thus far and no control is needed. 



Forage Insects 



The yellowing of alfalfa from potato leafhopper feeding was evident this week in 

 some fields. Damaged alfalfa has a yellow-to-purple cast and is stunted. After 

 damage is apparent, cutting is the only answer, since the damaged growth will not 

 recuperate. 



If leafhoppers are numerous in the new growth, spray when the new growth is 2 to 

 6 inches tall with 1 pound per acre of actual carbaryl (Sevin) or methoxychlor. 

 Allow 7 days to elapse between treatment and harvest when using methoxychlor; 

 there is no waiting period for carbaryl. 



Livestock Insects 



Pastured cattle were being bothered noticeably by flies this week. Stable flies 

 that feed on the legs and undersides of animals accounted for most of the irrita- 

 tion. In the northern two-thirds of the state, face fly populations are increas- 

 ing, but they are not yet damaging. Herds averaging 2 to 5 face flies per animal 

 were observed this week. A small number of horn flies were also present on pas- 

 tured cattle. The blood-sucking stable flies and horn flies along with the annoy- 

 ing face flies can drastically lower profits by reducing milk production and weight 

 gains . 



For pastured dairy cattle, apply 1 to 2 ounces of an oil-base spray of 2 percent 

 Ciodrin per animal; do this every 5 to 4 days for best results. A 1-percent di- 

 chlorvos (DDVP) or 0.1-percent pyrethrin oil-base spray applied at the rate of 

 1 or 2 ounces per animal every day or two can also be used. But these are less 

 effective than Ciodrin, particularly against the face fly. Water-base sprays of 

 the same material may be used, but control is less effective. Pay particular at- 

 tention to the animal's legs and undersides when spraying. 



For pastured beef cattle, apply a water-base spray of 0.5-percent toxaphene, using 

 1 to 2 quarts per animal every 5 weeks. This treatment does not control face flies. 

 Allow 28 days to elapse between treatment and slaughter with toxaphene. If the 

 situation permits its use, a 2-percent Ciodrin oil-base spray- -applied at the rate 

 of 1 to 2 ounces per animal every 5 to 4 days from an automatic sprayer- -is an ex- 

 cellent way to control the pasture fly complex on beef cattle. 



Homeowner Insect Problems 



Fleas are causing problems to returning vacationers. The family dog or cat is 

 either taken along or boarded out during the vacation period. Flea larvae pres- 

 ent in the house develop into hungry adults, spreading throughout the house in 

 search of a warm-blooded animal to feed on. 



