The objective of this work was to evaluate, under greenhouse conditions, the effect of different nematicides in the treatment of cotton seed for the control of Rotylenchulus reniformis. The products Imidacloprid, Clothianidin, Thiametoxam, Abamectin, Thiodicarb + Imidacloprid, and Thiodicarb were used. Nematode inoculation with 2,000 juveniles + eggs + immature females of R. reniformis per pot was carried out concomitantly with seed sowing (cvs. Fibermax 966 and IAC 25 treated and non-treated). After 22 and 44 days from the inoculation, evaluations were made of the plant height, fresh root weight, dry top weight, nematode number in the roots and nematode multiplication. The results showed that seed treatment with Thiodicarb + Imidacloprid, Thiodicarb + Imidacloprid + Clothianidin, Thiodicarb 350 and Thiametoxam 350 FS + Abamectin 500 FS were effective to protect roots against R. reniformis penetration.
Reniform nematode; nematicides; Gossypium hirsutum; chemical control