93 



were used to predict the requirements for slow-release formulations. The pre- 

 dictionc indicated that a slow-release formulation will only be effective if 

 the amount applied excee Is the amount necessary for Initial control of a pest 

 population. Also, a slow-release formulation may be the most effective against 

 the insect pests that are most susceptible to a compound. An effective slow- 

 release fonnulation should decrease the adverse effects of aldicarb on seedling 

 emergence after soil applications. Controlled biological tests with cotton, 

 boll weevils, aphids, and spider mites confirmed the model predictions. 



173. Cowan, C. B., Jr., and Davis, J. W. 1967. Systemic insecticides for con- 

 trol of the boll weevil and the cotton fleahopper. J. Econ. Entomol. 

 60: 1038-1041. 

 In field experiments Temik®, a 10% granular formulation of UC-21149 (2-methyl-2= 

 (methylthio) propionaldehyde O-(methylcarbamoyl)oxime) applied in the furrow 

 when the cottonseed was planted, controlled thrips, Frankliniella spp., for 

 5-6 weeks and the cotton fleahopper, Psallus seriatus (Reuter), for about 9 

 weeks after planting. Used as a sidedressing, Temik gave control of the over- 

 wintered boll weevil, Anthonomus grandis Boheman, that was comparable to that 

 of 2 foliar applications of azinphosmethyl and seasonal control of the cotton 

 fleahopper. Although populations of Heliothis spp. remained light and below 

 damaging levels, more eggs and larvae were found in the terminals, and more 

 injured squares and bolls were found on cotton plants side-dressed with Temik 

 than were found on untreated plants or on plants treated with azinphosmethyl. 

 Also, 1 application of Azodrln® (3-hydroxy-N-methyl- cls- crotonamidci dimethyl 

 phosphate) to the stems of cotton plants at 0.5 lb per acre gave seasonal 

 control of the cotton fleahopper. 



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