Examining the effects of Rotylenchulus reniformis and thrips alone and in combination on cotton seedling development and yield

The effects of R. reniformis and thrips (Thysanoptera, Thripidae) alone and in combination on cotton seedling development and yield and the effects of reniform nematode and thrips populations in the presence of a nematicide and/or insecticide on cotton seedling development and yield were studied. There was an interaction between the two pests on reducing plant heights in both 1999 and 2000, and on delaying the location of first fruiting node.; Data also showed that where both pests were present and controlled with pesticides, plant heights were greater than where both pests were present and not controlled. Both pests had an additive effect on delay of fruiting. Some data indicate that thrips may have a greater effect than nematodes on boll numbers and total boll weight.