dR% 33-7 1 



June 196U ARS-33-92 



UNITED STATES DEPAETMENT OF AGRICULTUEE 

 Agricultural Research Service 



FIELD EXPERIMENTS FOR THE CONTROL OF CABBAGE INSECTS 



By M. W. Stonei/ and R. G. Prochaska 2 -/ 

 Entomology Research Division 



Field experiments were conducted in small plots in southern California in 

 I96O-61 to obtain data on the effectiveness of several insecticides and a 

 pathogen in the control of two cabbage insects, the cabbage looper ( Trichoplusia 

 ni (Hubner)) and the cabbage aphid ( Brevicoryne brassicae (L.)). This is a 

 report of the results of these experiments and not a recommendation of any of the 

 materials tested ..2/ 



Steinhauer et al.,-i/ who tested insecticides against cole-crop insects in 

 Maryland, found dimethoate superior because it controlled aphids as well as 

 caterpillars . In the control of loopers in Iowa, Wolfenbarger and Hibbs2/ 

 reported that endrin was the most effective compound and that Guthion, parathion, 

 and endosulf an were superior to DDT against caterpillars on cabbage . Harcourt 

 and CassH/ obtained the best control with endrin, Guthion, and mevinphos . Hall 

 and Andresl/ found Bacillus thuringiensis var. thuringiensis Berliner ineffective 

 against the cabbage aphid and recommended the use of insecticides when this aphid 

 was present. 



1/ Retired April 1963. 



2/ Resigned September 19^3 • 



3/ Mention of a proprietary product in this publication does not constitute 

 a guarantee or warranty of the product by the U.S. Department of Agriculture and 

 does not imply its approval by the Department to the exclusion of other products 

 that may also be suitable . 



h/ Steinhauer, A. L., Ditman, L. P., and Wiley, R. C. Insecticidal control 

 of insects infesting broccoli and cabbage. Jour. Econ. Ent. 52: 8l6-8l8. 1959* 



5/ Wolfenbarger, Dan, and Hibbs, E. T. Insecticides and spray schedules 

 for the control of cabbage leaf feeding Lepidoptera. Jour. Econ. Ent. 51 : 1+1+3- 

 1+1+5. 1958. 



6/ Harcourt, D. G., and Cass, L. M. Control of caterpillars on cabbage in 

 the Ottawa Valley of Ontario and Quebec, 1956-57. Jour. Econ. Ent. 52: 221-223. 

 1959- 



7/ Hall, I. M., and Andres, L. A. Field evaluation of commercially produced 

 Bacillus thuringiensis Berliner used for control of lepidopterous larvae on 

 crucifers. Jour. Econ. Ent. 52: 877-880. 1959. 



