-4- 



Those of you selling or making suggestions for the use of malathion on stored 

 wheat can expect complaints from farmers , beginning in late July through Septem- 

 ber. At present, we have no substitute for malathion as a protective material 

 for stored grains. Also, there does not appear to be a total failure of mala- 

 thion as yet to control the Indian meal moth. Malathion is still effective 

 against the remainder of the insect complex that attacks stored wheat (about 

 twelve important ones). We feel the continued use of malathion in a complete 

 control program involving (1) bin cleanup, (2) bin spraying, (5) treatment of 

 grain during storage, and (4) two surface treatments --one at the conclusion 

 of storage and one in early to mid-August- -will still provide satisfactory 

 protection on the vast majority of farms. 



Fumigation with Phostoxin, the 75 mixture (ethylene dibromide plus methyl bro- 

 mide) , the 75-25 mixture (ethylene dichloride plus carbon tetrachloride), or the 

 80-20 mixture (carbon bisulfide plus carbon tetrachloride) can be used for emer- 

 gency purposes when insects are present, but such treatments will not provide 

 lasting protection. 



HOMEOWNER INSECTS 



Bagworms . The hatch is complete in the southern section. Sprays should be ap- 

 plied immediately. The target date for spraying in the central section is after 

 June 15, in the northern section, after June 50. 



Control bagworms while they are small and easy to kill. Once the bagworms be- 

 come half grown or more, sprays often fail. 



For control, use carbaryl (Sevin) , diazinon, or malathion. Follow the direc- 

 tions on the label. Check carefully for plants that could be injured by the 

 insecticide used. One application applied at the correct time is usually all 

 that is needed. 



Sod webworm moths . They are flying now. These light, buff -colored moths fly in 

 a zig-zag pattern over lawns just about dusk. They are laying eggs that will 

 produce the first generation of worms. This generation is seldom numerous enough 

 to cause damage. The second- generation buildup of worms, coming in late July 

 through early September is the one that often presents problems. Brown spots in 

 the lawn and the sudden appearance of numerous birds like robins are signs that 

 webworms may be at work. 



If the webworms strike, you can control them with carbaryl (Sevin), diazinon, or 

 trichlorfon (Dylox) . These can be used as sprays or granules. 



Aphids . These are common on many trees and shrubs- -tulips, willows, sycamores, 

 honeysuckles, roses, and others. These small, soft-bodied insects (green, yel- 

 low, black, or red) suck the sap from plants and secrete a sticky material called 

 "honeydew." This sugary material coats the leaves, making them glisten. A black 

 mold may develop when the honeydew deposits are heavy. Cars parked beneath in- 

 fested trees become covered with sticky spots. 



Ants feed on the sugary secretions of aphids. Thus, the presence of a large num- 

 ber of ants on a plant may be a sign that aphids are also numerous. Another sign 

 of infestation is the presence of white specks on leaves. These are the cast skins 

 of the aphids. In most cases aphids or plant lice do little damage. However, if 



