-3- 



Some nurserymen indicate that populations of 

 emerging adult cicadas in 1956 were very heavy 

 in many wooded areas in Cook County and adjoin- 

 ing counties . Adult cicadas DO NOT eat plant 

 foliage, but DO damage small brandies by making 

 slits in them in which to deposit their eggs. 

 Such small branches often turn brown and die, 

 sometimes breaking off. The female cicada pre- 

 fers to lay eggs in the twigs of oak, hickory, 

 apple, peach, and pear trees and in grape vines. 



To prevent egg- laying damage, small shade trees 

 and ornamental plants can be covered with net- 

 ting, such as cheesecloth. Egg- laying usually 

 begins about a week after emergence from the 

 soil. Carbaryl (Sevin) applied as a spray is 

 effective for controlling cicadas. Use this at 

 the rate of 2 pounds of 50-percent wettable pow- 

 der per 100 gallons of water, or 2 tablespoons 

 per gallonof water. Repeat this spray five days 

 later. Do not apply carbaryl to producing apple 

 trees within thirty days after full -bloom, since 

 doing so may cause fruit thinning. Do not apply 

 Sevin to Boston ivy. There is no effective in- 

 secticide other than carbaryl that is labelled 

 for use in controlling periodical cicada. 



INSECTICIDE USE IN FOOD STORES 



Insect control practices in food service estab- 

 lishments have been restricted by the Federal 

 Environmental Protection Agency in two recent 

 actions. The EPA has taken the position that 

 residual-kill insecticides should not be em- 

 ployed in any location in a food-service establishment where exposed food is present at 

 any time. Several insecticides (such as diazinon, Dursban, chlordane, malathion, and 

 Baygon) have been used in the past with certain restrictions . They can no longer be 

 used in food-service establishments , except in areas involved in receiving, shipping, 

 storage, or warehousing packaged or canned food. 



Even the quick-knockdown, contact -type insecticides, such as pyrethrin and dichlorvos 

 (DDVP) , may be used only after the establishment has been closed--and then only if all 

 food and food-contact surfaces are covered. Of prime concern is the fact that contin- 

 ually operating faciltiies will be difficult, if not impossible, to service adequately 

 under the EPA policy. 



Food- service establishments include facilities such as cafeterias, delicatessens, res- 

 taurants, soda fountains, bars, clubs, catering services, galleys on planes or ships, 

 mess or dining halls at military installations, colleges, schools, or other institu- 

 tions. Boarding houses, nursing homes, and hospitals are also included. 



WEEDS 



NEW HERBICIDE CLEARANCE 



Bladex (cyanazine) + AAtrex (atrazine ) has been cleared as a tankmix, preemergence 

 combination for corn. The mix is 1 part cyanazine and 1 part atrazine, except where 



