Bemisia argentifolii adult, nymph and egg densities and egg distribution on selected upland cottons

Five upland cotton, Gossypium hirsutum L., cultivars, Deltapine (DPL) 50, 5 415 and 5432, Fibermax 832 and Siokra L23. were studied in relation to silv erleaf whitefly, Bemisia argentifolii Bellows and Perring, oviposition and colonization. Deltapine 5415 and 5432 had the highest numbers of eggs and n ymphs and Siokra L-23 the lowest. Siokra L-23 also had the lowest number of adults compared to the other four cultivars. Over 75% of eggs were oviposi ted on leaf surfaces between veins and 23% were oviposited in veins that we re less than or equal to 4 cells wide. Few eggs were found on veins that we re five or more cells wide. No eggs were inserted into leaf stomata.