Of the five remaining materials used in experiment 6, the naled-phospharaidon 

 mixture, Guthion, and demeton plus parathion gave only partial control of loopers, 

 but these materials and malathion were highly effective as aphicides . Menazon 

 controlled cabbage aphids, but gave poor control of loopers . 



In experiment 7 > six materials or combinations were applied as sprays with 

 power equipment in replicated plots four rows wide by 98 feet long. Applications 

 were made on March 30> April 12, and 25. Infestation counts were made after each 

 application and at harvesttime on May 9> when all leaves on eight heads per plot 

 were examined for loopers and aphid colonies. All materials or combinations 

 significantly reduced the infestations of small, medium, and large loopers . 

 Endosulfan gave excellent control of all loopers and of aphids . The mixtures 

 parathion plus B. thuringiensis and toxaphene plus parathion also were effective 

 against these pests. Toxaphene plus demeton gave the best control of aphids. 

 Some leaf burn was noted after each application of the mixtures containing 

 parathion . 



Experiment 8 included materials or combinations showing the most promise in 

 previous tests. Applications were made on May 5> l6, and 26. Looper and aphid 

 counts were made after each application and at the time of harvest on June 6. 

 Zectran and parathion plus B. thuringiensis gave the best control of all sizes of 

 loopers, but poor control of aphids. Dimethoate at 1 and at one -half pound was 

 highly effective as an aphicide, but the latter dosage did not adequately control 

 loopers. All remaining materials provided significant reductions in loopers when 

 compared with the check but gave only fair control of aphids. 



CHEMICAL NAMES OF PROPRIETARY MATERIALS OR COMPOUNDS 



WITHOUT ACCEPTED COMMON NAMES MENTIONED 



IN TEXT OR TABLES 



American Cyanamid 2^055 l,l-dimethyl-3-(p_-acetamidophenyl) 



triazene 



Bayer 29^91 -/3-chloro-U- (me thylthio) phenyl/ 



0,0-dimethyl phosphorothioate 



Bayer 3O9II 0-2,*i-dichlorophenyl 0-methyl 



methylphosphonothioate 



Bayer 373^1 0,0-diethyl 0-/£-(methylthio)-3,5-xylyl7 



pho sphoro thi oate 



Bayer 390°7 o-isopropoxyphenyl methylcarbamate 



Geigy G-30^9U S-/Y~( 2 >5-dichlorophenyl)thio7methyl7 



0,0-dimethyl phosphorodithioate 



General Chemical 3583 2-chloro-l-(2,5-dichlorophenyl)vinyl 



diethyl phosphate 



- h - 



