vine crops. Cucumbers and other vine crops have been reported to be wilting these 

 past two weeks. To prevent bacterial wilt, the cucumber plants need to be protected 

 from feeding by the beetles. Carbaryl (Sevin) applied as a dust or as a spray will 

 control this insect. If blossoms are present, treat late in the day after all bee 

 activity has ceased. 



Mimosa webworms are rapidly becoming noticeable on many honey locust trees. These 

 caterpillars feed and spin webs around terminal leaves and branches, causing the out- 

 er area of the tree to turn brown. These webworms have been present for some time, 

 but may still be controlled with sprays containing malathion or carbaryl (Sevin) . 



Sod webworm second-generation moths are emerging in central Illinois, and will soon 

 be emerging in the northern section. These white millers can be observed flying over 

 lawns at dusk and around lights after dark. During the day, they hide in shrubbery 

 and grass. Egg hatch and larval feeding damage usually follows moth flight by about 

 10 to 14 days. Sod webworm damage symptoms will appear as irregular brown spots in 

 the lawn; birds feeding in the turf grass; or upon close examination, the presence of 

 grey or dusky-green caterpillars in the grass. 



If numerous sod webworm moths have been flying over your lawn, you may wish to apply 

 an insecticide about two weeks after moth flight for control. Use either diazinon, 

 (Spectracide) , carbaryl (Sevin), or chlorpyrifos (Dursban) --either as a spray or as 

 granules. Follow directions on the label for the correct amount to use. Fertiliz- 

 ing and watering the lawn will often help overcome webworm damage. 



Leafhoppers are wedge-shaped green insects that suck plant juices from the leaves of 

 beans and potatoes, causing them to crinkle and curl. Leafhoppers secrete a toxin 

 into the leaves that causes a browning of the leaf tips and edges and the death of 

 the entire leaf, or even the entire plant. Green beans and potatoes in many home gar- 

 dens now show severe damage. Sprays or dusts containing carbaryl will control leaf- 

 hoppers on these vegetables. 



Picnic beetles are nuisances when they visit your picnic table. They also invade gar- 

 dens, where they attack fruits and vegetables damaged by weather or other insects. 

 These beetles particularly like to penetrate ripe tomatoes with growth cracks. 



These black beetles with the four ye How -to -orange spots on their backs are difficult 

 to control. Sprays of carbaryl (Sevin) may be helpful. Use 2 tablespoonfuls per 

 gallon of water in your garden. Diazinon sprays around garbage containers and in 

 some vegetables may also be helpful. Do not harvest tomatoes for at least 24 hours 

 after application. Follow label directions for use in home gardens. 



WEEDS 



CORN WEED CONTROL 



Do not spray with 2,4-D when corn is between the tassel and dough stages . By tassel 

 stage, we mean the time when the tassels are just beginning to emerge- -about four to 

 five days before corn silks begin to show. Research at Iowa State University has in- 

 dicated that spraying with 2,4-D during this critical period may result in a failure 

 of the kernels to develop properly on the ears. The problem does not appear to be 

 caused by the presence of 2,4-D on the silks or tassels, rather by 2,4-D that moves 

 into the leaves and through the plant to the ears. After the kernels are well-formed 

 and have reached the dough stage (having the consistency of soft dough when pressed) , 

 it is safe to resume spraying 2,4-D with high- clearance equipment. 





