

377 



were applied to the seed, they were less effective against thrips than when 

 they wert applied in a granular formulation with the seed at planting. 

 Granular Jormulations of UC-21149 applied as a side-dressing gave good control 

 of caged boll weevils, Anthonomus grandis Boheman, and better suppression of 

 the two-SjJotted spider mite, Tetranychus urticae (Koch), than the other 

 materials tested. Granular formulations applied with the seed at planting 

 did not adversely affect seed germination and emergence of plants, but the 

 higher rates of treatment reduced stands later. Treatment of the seed 

 did adversely affect germination and/or emergence. Control of thrips 

 resulted in earlier fruiting of plants, but yields usually were not in- 

 creased. 



738. . 1968. Field tests with in-furrow and seed treatments of systemic 

 insecticides on cotton at Stoneville, Mississippi. J. Econ. Entomol. 

 61: 1607-1612. 

 Systemic insectides were evaluated for effect on insect control, plant 

 stand, early fruiting, and yield of cotton in 1966 and 1967. Granular 

 formulations of disulfoton, phorate. Allied Chemical GC-6506 (dimethyl £- 

 (methylthio) phenyl phosphate), Hercules 13462 (0,0-dimethyl phosphoro- 

 dithioate S^-ester with N-(l-mercaptoethyl) succinimide) , Niagara NIA-10242 

 (2,3-dihydr»-2,2-dimethyl-7-benzofuranyl methylcarbamate) , and Union Carbide 

 US-21149 (2-methy 1-2- (methylthio) Propionaldehyde O-(methylcarbamoyl) oxime) 

 applied with the seed at planting gave good initial control of tobacco 

 thrips, Frankliniella fusca (Hinds); UC-21149 gave the best residual control. 

 Seed treated with Azodrin® (3-hydroxy-N-methyl- cis- crotonamide dimethyl 

 phosphate), disulfoton, methomyl, Hercules 13462, and NIA-10242 gave fair 

 to good initial control of thrips. Populations of other insect species 

 did»-not become a problem. The treatments reduced stands in some tests 

 but not in others. The control of thrips that was achieved with the sys- 



