-2- 



provided a 7-day waiting period is observed. For "best results, apply in the late 

 afternoon. These four insecticides are the only ones recommended for hay crops 

 or pastures for dairy animals or livestock fattening for slaughter. 



Occasionally grasshoppers can "be trapped into narrow uncut strips of 

 clover or alfalfa and then sprayed, reducing the overall cost of materials. Leave 

 a few uncut swaths around the margin of the field and one swatch a rod or so wide 

 through the center of the field. As you cut the remainder of the field, the 

 •hoppers will concentrate in these strips of uncut hay. Then spray the uncut 

 strips. 



If areas will not be grazed or used for hay, apply 1 to 2 ounces of 

 dieldrin or 1 1/2 pounds of toxaphene per acre to control small 'hoppers. 



For soybeans or corn for grain, use 1 to 2 ounces of dieldrin or 1 l/2 

 pounds of toxaphene per acre. Allow 60 days to elapse between application of 

 dieldrin and harvest. If corn or soybeans are to be used for ensilage, hay or 

 pasture, use sevin or malathion with a 7-day interval between application and 

 harvest. Diazinon can be used en ensilage corn with a llj--day interval between 

 application and harvest. 



Blister beetles , as reported a few weeks ago, are common in hay crop 

 fields and soybean fields. In addition they are also eating -weeds in corn fields. 

 When grasshopper egg pods are abundant, as they were this past winter and spring, 

 the larvae of blister beetles feed in them. This is the reason for the abundance 

 of blister beetles this summer. 



Rarely is it necessary to control blister beetles, but in soybeans 1 l/2 

 pounds of toxaphene will control grasshoppers and noticeably reduce the number of 

 blister beetles. In hay crop fields, dibron and sevin are reported to be effec- 

 tive against blister beetles. 



Adult chinch bugs in late corn were also observed this week. Basal sprays 

 of l/k pound of dieldrin or 1 l/2 to 2 pounds of toxaphene per acre -will control 

 them if they are numerous enough to be damaging. 



Fall armyworms have been observed in corn in pretassel. Several plants 

 in an area are ragged from chewing. Infestations to date have not been significant, 

 and control is not recommended. Another generation may infest ears in late August 

 or early September. 



Sod webworm moths have been flying for several days. We apparently have 

 had at least one generation of webworms thus far, and another generation will soon 

 be here If it is not here already. 



Clipped brown spots in sod areas may be evidence of webworm feeding. 

 Careful examination of the sod may reveal the silken tunnels or cases and possibly 

 the worms themselves. 



Several insecticides can be used to control webworms in lawns. Sevin, 

 l/k to 1/2 pound, diazinon, l/k pound, DDT, l/8 pound, or dieldrin, 1/2 ounce, 

 can be used for each 2500 square feet of surface. Where birds are extremely 

 abundant, it would be best to use sevin. 



