-4- 



Treatment is justified if there are 6 or more armyworms per foot of row as an average 

 over the field. For control, apply 1-1/2 pounds of actual toxaphene per acre. There 

 are no restrictions on the use of the grain, but do not feed the straw to dairy cattle 

 or to livestock being fattened for slaughter. Do not contaminate fish-bearing waters. 

 Avoid drift onto pastures or hay fields. Trichlorfon (Dylox) at 3/4 pound of actual 

 chemical per acre may be used to within 21 days of harvest, but the straw should not 

 be used for livestock feed. Use carbaryl (Sevin) at 1 pound of actual chemical per 

 acre on grass pastures or hay fields. Warn area beekeepers when carbaryl is applied. 



FORAGE INSECTS 



Alfalfa weevil larvae populations are declining in the southern part of the state, as 

 pupation increases and adults emerge, In the central and north- central sections (be- 

 tween Route 36 and Route 34) , larvae are causing economic damage to many fields of 

 first-crop alfalfa. In this area, it is best to cut and remove the hay; then watch 

 the new growth for damage. 



Some serious larval damage to the new growth of the second crop has been reported 

 south of Route 50. If the new, second-crop growth does not green-up within 2 to 

 4 days after cutting, look for the small, green larvae or the 1/4 inch, brown-snout 

 beetle adults of the alfalfa weevil. Treat promptly if either or both are present 

 and if 25 percent or more of the terminals show feeding. Adult feeding damage, 

 which appears as a "feathering" along leaf margins, may occur in the extreme southern 

 areas as the pattern of emergence increases . 



For control of the alfalfa weevil larvae, farmers making their own applications 

 should use malathion or a commercially prepared malathion-methoxychlor or methoxychlor- 

 diazinon (Alfatox) mixture. Commercial applicators can use the above materials or 

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

 Be sure to follow the label directions for dosages, harvest limitations, and precautions 

 when using insecticides . 



HOMEOWNER INSECT PROBLEMS 



Bagworms are hatching in southern sections. Sprays should be applied immediately. In 

 the central sections, the target date for spraying is after June 15; in northern sections 

 after June 30. 



For best results, spray while the worms are still small and easy to kill--and before 

 damage is evident. Use either carbaryl (Sevin), diazinon, or malathion. The latter 

 will also provide fair control of any mites that are present. Follow the recommenda- 

 tions on the label, and check the plants that may be injured by the particular insecti- 

 cide being used. 



Leaf miners are feeding between the upper and lower surfaces of the leaves on some 

 birch trees, leaving blotches and "mines." For control, spray the foliage thoroughly 

 when the mines first appear. Use diazinon (4 tablespoons of diazinon 25-percent E.C. 

 in 6 gallons of water) or malathion (4 tablespoons of malathion 50- to 57-percent E.C.). 

 Repeat the treatment in 10 to 12 days. 



Elm leaf beetles will soon be skeletonizing the leaves of Chinese elm. Other elm 

 species are also affected to some extent. These are small, dirty-yellow to black 

 worms found on the undersides of the leaves. A spray of carbaryl (Sevin), using 

 2 pounds of 50-percent wettable powder per 100 gallons of water, or lead arsenate, 

 using 4 pounds of wettable powder per 100 gallons of water, is effective. 



