394 



to lower leaves, little or no SD-9129 was found in untreated leaves above 

 treated lower leaves. However, relatively large amounts were found in nectar 

 of the cotton plant after the toxicant was applied to the stem. SD-9129 was 

 not particularly effective as a systemic insecticide when it was applied to 

 cotton seed or to the soil. 



770. ; Walker, H. J.; Hanna, R. L.; and Owen, W. L. 1967. Fertilizers 

 Impregnated with systemic insecticides for control of cotton insects. 

 J. Econ. Entomol. 60: 592-594. 



Greenhouse and field tests were conducted to compare the effectiveness 

 against cotton Insects ot granules and fertilizer iiupregnated with phorate, 

 disulfoton, and American Cyanamid CL-47031 (cyclic ethylene (diethoxphos- 

 phinyl)dithioimidocarbonate) and applied to cotton plants. Bioassays and 

 radioassays of treated plants indicated that the levels of uptake from 

 both formulations were similar after In-furrow and sidedress applications. 

 Phorate and disulfoton were stable on 1 grade of fertilizer for more than 

 3 months. 



771. Roach, S. H. 1973. Developmental changes in the boll weevil, Anthonomus 

 grandis , studied with time-lapse photography. Ann. Entomol. Soc. Am. 

 66: 24-27. '•• 



Tim(*=Tapse" photography techniques were developed to determine the ti^e required 

 for Anthonomus grandis Boheman, held at 26.6°C, to change from each develop- 

 mental stage to the next. The mature embryo abraded the egg chorion in 2-4 

 minutes. The time required from the initial splitting of the cuticle of 2nd- 

 and 3rd-stage larvae to complete cast off of the cuticle was also 2-4 minutes. 

 Durations of the stages wece: 2-3 days for the egg; 1-2 days for the larval 

 stadium; 1-15 days for the 2nd stadium; 4-7 days for the 3rd stadium including 

 prepupa; and 4 days for pupa. 



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