-3- 



three times each week, even though the number of flies may be low. A 1-percent crotox- 

 yphos , water-base spray- -applied at 1 pint per animal per week--is also effective. This 

 treatment is more practical for young stock and for dry stock. 



For pastured beef cattle, the 1-percent crotoxyphos , water-base spray- -applied at 1 pint 

 per animal per week--should be considered. An automatic chute-type sprayer using 1- 

 percent crotoxyphos plus 0.25-percent dichlorvos in oil is another good choice. Other- 

 wise, use a head or back oiler, wrapped with canvas or burlap and saturated with a 5- 

 percent solution of toxaphene in oil. This will afford partial relief from face flies. 

 Keep the oiler in good repair and well saturated. Do not apply toxaphene to beef cat- 

 tle within 28 days of slaughter. 



HOMEOWNER INSECTS 



Striped blister beetles have invaded many home vegetable gardens infesting tomatoes, 

 potatoes, and other vegetables. These black- and- grey striped beetles cause the leaves 

 to curl up and die, sometimes killing the entire plant. For control, spray or dust 

 the foliage with carbaryl (Sevin) . Also treat weedy areas next to the garden if these 

 beetles are present in such areas . 



Squash bugs are beginning to lay eggs on the leaves of vine crops such as squash and 

 melons . The eggs are shiny and dark red, and are laid in rows between the veins of 

 the leaves. The newly hatched squash bugs are dark-brown, wingless insects. It is 

 important to attempt to control squash bugs while they are still small, since control 

 is impossible once the adult stage is reached. Spray or dust the leaves of vine crops 

 with carbaryl (Sevin), making sure to treat the underside of the leaves. 



Sod webworm moths are beginning to appear in increasing numbers, particularly in south- 

 ern and central sections. These buff -colored moths rest in shrubbery and tall grass 

 during the day and are seen flying in a zigzag pattern over the lawn near dusk. These 

 are the second -gene rat ion moths that are laying their eggs at this time. If you find 

 large numbers of these moths in your yard, plan to treat your lawn with an insecticide 

 about 2 weeks later. Usually target dates for treatment are late July in southern sec- 

 tions, early to mid-August in the central section, and mid- to late August in the north- 

 ern sections. 



The larvae of the webworm are grey worms with brown spots and black heads. They are 

 about an inch long when full grown and live for 3 to 4 weeks in the worm stage. The 

 worms live in silken- lined burrows in the thatch of the lawn, clipping off grass 

 blades at the base. Brown spots appear in the lawn and large numbers of robins will 

 move in to feed on the larvae. By this time, it is usually too late for control. 



For control of webworms , apply a spray or granules of 2 pounds of actual carbaryl 

 (Sevin), 1 pound of actual diazinon, or 1-1/4 pounds of actual trichlorfon (Dylox) 

 per 10,000 square feet. Use about 25 gallons of water to distribute the insecti- 

 cide over the 10,000 square feet when spraying. Do not water the lawn for at least 

 3 days after treatment. If heavy rains occur within 3 days of application, a repeat 

 treatment may be needed. 



Pressurized spray cans provide an easy way to apply insecticides on plants, but leaves 

 can be damaged if such sprays are improperly used. We have been receiving complaints 

 recently about leaf burn on roses when this method was used to control aphids. Hold 

 the can back from the rose plants and allow the mist to flow into and around the plant. 

 Check the label for directions. Do not wet the leaves directly. This will cause the 

 burn. 



