-3- 



it is placed in storage [liquid spray treatment preferred to dust treatment] , and 

 (4) two surface treatments --one at the conclusion of storage and one in early- to 

 mid -August. 



HOMEOWNER INSECTS 



First- generation elm leaf beetles are skeletonizing the leaves of Chinese and other 

 elms in the central and northern sections. The damage by first-generation worms is 

 about over in the southern part of the state. These small, dirty-yellow to black 

 worms feed on the undersides of leaves and congregate in large numbers next to the 

 trunk at ground level when they are ready to pupate. A spray of carbaryl (Sevin) or 

 malathion is effective. Spray treatment may be needed again in late July in the 

 southern section to control second-generation worms. 



Picnic beetles (or scavenger beetles) could be abundant this summer. The generally 

 wet conditions of most areas in May could result in moderate -to -heavy populations of 

 these annoying insects. 



Prior to their emergence as an adult, the larvae feed on decaying vegetation, debris, 

 and fruit buried in the soil. The adult beetles are about a quarter of an inch long, 

 and are shiny black with four yellow spots on their back. They are attracted to the 

 odor of food, and get into food at picnics and cookouts. They congregate around gar- 

 bage containers and on the screens in kitchen doors and windows. 



For cookouts , spray the shrubbery and any nearby tall grass or weeds with malathion 

 or diazinon several hours before eating. A space spray of pyrethrins of dichlorvos 

 (DDVP) applied from a pressurized spray can just before eating will provide a quick 

 knockdown of the beetles. 



WEEDS 



POSTEMERGENCE HERBICIDES FOR CORN 



2,4-D provides one of the most economical and effective treatments for many broad- 

 leaf weeds in corn. For maximum effectiveness, apply 2,4-D when the weeds are small 

 and easiest to kill. You can broadcast the spray over the top of the corn and weeds 

 until the corn is about eight inches high. After that, use drop extensions from the 

 boom down to the nozzles. 



These "drop nozzles" help keep the 2,4-D out of the whorl of the corn and decrease 

 the possibility of injury. Direct the nozzles toward the row, where most of the 

 weeds will be. However, if you do this, be sure to adjust the concentration of the 

 spray so that excessive amounts are not applied to the corn. 



Each year some corn is damaged by 2,4-D. It is virtually impossible to eliminate 

 all cases of 2,4-D damage. The chemical usually makes corn brittle for a week or 

 ten days. If struck by a strong wind or by the cultivator, some corn may be broken 

 off. Some stalks may "elbow" or bend near the base. Other symptoms of 2,4-D injury 

 are abnormal brace roots and "onion- leafing," a condition in which the upper leaves 

 remain tightly rolled, which may delay tassel emergence. 



Spraying 2,4-D during very cool, wet weather when corn plants are under stress, or 

 during very hot, humid weather may increase the possibility of corn injury from 2,4-D. 



