injury. If moths are extremely thick in your yard, watch for signs of damage in 

 2 to 4 weeks. If treatment is needed, apply carbaryl (Sevin) or diazinon. Usually, 

 it is the second-generation worms (present in mid- July through August) that build 

 up and cause damage. 



In southern sections, bagworm hatch is complete and sprays should be applied im- 

 mediately. The target date for spraying in the central sections is after June 15, 

 in northern sections after June 30. 



Make plans to apply treatments early this year, while the worms are small and easy 

 to kill and before damage is evident. Carbaryl (Sevin), malathion, diazinon, or 

 lead arsenate are all effective. Follow label directions and check the plants that 

 may be injured if sprayed with the insecticide you are using. 



Oystershell scale hatch is completed in the central and southern sections ; sprays 

 will control them if applied during the next few weeks. In northern sections, 

 sprays should not be applied until after June 15, when hatch is complete. Careful 

 and thorough spraying with malathion (2 teaspoons of 50- to 57-percent concentrate 

 per gallon of water) will effectively control oystershell scale. An additional 

 treatment will likely be needed in mid- August for second-generation crawlers. 

 Even though scales are killed by spraying, the scale covering will persist for 

 several months. 



Lilac borers are laying eggs. Spray the lower stems and larger branches (not the 

 leaves) with DDT. To mix, use 3 tablespoons of 25-percent DDT emulsion concen- 

 trate per gallon of water. Repeat the treatment in 2 weeks. 



In the southern half of the state, first generation elm leaf beetles are skeleton- 

 izing the leaves of Chinese elms, and to seme extent other species of elms. These 

 small, dirty-yellow- to-black worms can be found on the undersides of leaves. If 

 control becomes necessary, spray with carbaryl (Sevin), using 2 pounds of 50-percent 

 wettable powder per 100 gallons of water or with lead arsenate, using 4 pounds of 

 wettable powder per 100 gallons of water. An additional treatment may be needed 

 for second-generation worms in late July or August. 



Adult tree borers are now emerging from their overwintering sites beneath the bark 

 and from crevices in trees. These insects will lay their eggs in cracks in the 

 bark of trees, nearly always selecting a spot where the bark has been injured. 



Borer attack can be prevented by spraying the tree trunks with DDT. For 1 gallon 

 of spray, use 2 heaping teaspoons of 50-percent DDT wettable powder, or 3 table- 

 spoons of 25 -percent DDT emulsion. Apply the spray at monthly intervals from 

 early June to August. 



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

 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, de- 

 bris, and fruit buried in the soil. The adult beetles are about 1/4- inch long, 

 shiny black with 4 yellow spots on their back. They are attracted to the odor of 

 food and get into food at picnics and cookouts. They congregate around garbage 

 containers and on kitchen door-and-window screens. 



