-3- 



and fruit trees. The caterpillars feed on the foliage outside their web nests, often 

 completely defoliating the trees. If control is necessary, apply a spray containing 

 carbaryl (Sevin) , using 2 tablespoons of the 50-percent wettable powder per gallon of 

 spray . 



Tree borers - -attacking oak, ash, apple, birch, and similar trees- -have previously been 

 controlled by DDT. DDT is now prohibited for sale or use in Illinois. Other control 

 measures include keeping the trees in a vigorous growth condition by applying ferti- 

 lizer or by wrapping the trunks of newly planted trees and other young ones with spe- 

 cial paper. Dimethoate (Cygon) has been effective against these borers- -especially 

 the bronze birch borer. Treatment of infested trees should be made in mid- to late 

 May. 



Euonymous scale hatch has begun, and these crawlers are moving onto new leaves and 

 stems . Another name for euonymous is wintercreeper. Where this insect is a problem, 

 apply malathion as a spray- -thoroughly covering the bark and leaves. Make two to 

 three applications on the infested shrubs. Space the applications about 10 days apart. 

 The first application should be in mid-May in the southern part of the state, during 

 the latter part of May in the central section, and in early June in the northern area. 



WEEDS 



Several new herbicide names are appearing. Many of the products are not new, but are 

 combinations of existing products. Some of these are listed below: 



Solo naptalam (Alanap) + chlorpropham (Chloro-IPC) 



Whistle Same as above 



Amoco Soybean Weed Killer Same as above 



Noraben norea (Herban) + chloramben (Amiben) 



Shamrox DCPA (Dacthal) + linuron (Lorox) 



Amilon chloramben (Amiben) + linuron (Lorox) 



Londax propachlor (Ramrod) + linuron (Lorox) 



Primaze atrazine (AAtrex) + prometryne (Caparol) 



The primary purpose of herbicide combinations is to control more weeds under a wider 

 range of soil and climatic conditions, while reducing crop injury and sometimes cost. 



READ THE LABEL AND FOLLOW ALL PRECAUTIONS 



This weekly report was prepared as follows : 



INSECTS: H.B. Petty, Steve Moore, Roscoe Randell , Don Kuhlman, and Tim Cooley , College 

 of Agriculture , University of Illinois at U 'rb ana-Champa ign , and the Illinois Natural 

 History Survey. 



WEEDS: M.D. McG lamer y , Department of Agronomy. 



AG COMMUNICATIONS : Del Dahl . 



The information for this report was gathered by these people, staff members, county 

 Extension advisers, and others, in cooperation with the USDA Agricultural Research 

 Service, Plant Pest Control Branch. 



