Trade names are used in this publication solely to provide 
specific information. Mention of a trade name does not constitute 
a guarantee or warranty and does not signify that the product is 
approved to the exclusion of other comparable products. 
The opinions expressed in this publication are those of the 
authors and do not necessarily constitute an endorsement by the 
U.S. Department of Agriculture. 
Caution: If pesticides are handled or applied improperly, 
or if unused portions are disposed of improperly, they may be 
injurious to humans, domestic animals, desirable plants, honey 
bees and other pollinating insects, fish, and wildlife, and may 
contaminate water supplies. Use pesticides only when needed and 
handle them with care. Follow the directions and heed all 
precautions on the container label. 
Underscored numbers in parentheses or years in parentheses 
after the authors’ names refer to references at the end of each 
paper. 
References are given and the artwork is reproduced essen=- 
tially as submitted. 

Use Pesticide SYfely 
FOLLOW THE LABEL 
U.S. DEPARTMENT OF AGRICULTURE 
