■7r.~--3 



211 



Heliotb Is zea (Boddie) , and H. vlrescens (F.) were controlled with foliar 

 applications of the synthetic pyrethroids AC-222,705 (cyana(3-phenoxyphcjnyl) 

 methyl (>+)-4-(dif luoromethoxy)-a-l-methylethyl)benzeneacetate) , cic- 

 permethrin, cypermethrin, NRCS-161 (S)-[cyano(3-phenoxyphenyl)mehtyl] £i£- 

 (■'")~2-(2,2-dibromoethenyl)-2,2-dimethylcyclopropanecarboxylate) , fenvalerate, 

 cis- cypermethrin. permethrin and the organophosphates, profenofos, sulprofos, 

 and RH-0994 (£-[4-(4-chlorophenylthio)phenyl] 0-ethyl S-propyl phosphoro- 

 thioate), and the carbamate, thiodicarb. The cabbage looper, Trichoplusia 

 ni (HUbner), was controlled with fenvalerate, profenofos, thiodicarb, and 

 sulprofos + azinphosmethyl. The fall armyworm, Spodoptera frugiperda (J. E. 

 Smith), was controlled with AC-222,705, and RH-0994 + azinphosmethyl. Light 

 infestations of the spider mite, Tetranychus sp., was suppressed with RH-0994. 

 Thiodicarb, profenofos, RH-0994, and sulprofos produced reddened leaves but 

 had no apparent adverse effect on yield. Data from all tests indicated that 

 the new material(s), per se, have no effect on maturity, germination of seed, 

 fiber length, or fineness. 



409. , and Moore, Raymond F. 1980. Thidiazuron: effect of applications on 

 boll weevil and bollworm population densities, leaf abscission, and 

 regrowth of the cotton plant. J. Econ. Entomol. 73: 768-770. 

 In a replicated field test with cotton, a preconditioning application of 

 thidiazuron at 0.11 kg Al/ha followed by a full defoliating application 

 (0.22 kg Al/ha) applied 7 days later removed significantly more leaves and 

 squares and reduced regrowth significantly more than an application of a 

 standard defoliant, S^, £, S-tributyl phosphorotrithioate (as DEF®) , applied 

 at 1.56 kg Al/ha. Thidiazuron treatments also reduced population densities 

 of boll weevils, Anthonomus grandis grandis Boheman, and bollworms, Heliothis 

 zga (Boddie), but did not adversely affect yield, seed germination, or fiber 

 properties. 



