EVALUATION OF SOME BIOCIDES AND LATEX-BEARING PLANTS FOR CONTROLLING THE RENIFORM NEMATODE, ROTYLENCHULUS RENIFORMIS ON CHAMOMILE (MATRICARIA CHAMOMILLA)

摘要

All the evaluated biocides and latex-bearing plants significantly (p ≤ 0.05 and / or 0.01 levels) decreased the number of Rotylenchulus reniformis juveniles in soil, females and egg-masses on root, total final nematode population and consequently therate of nematode build-up, and improved the growth and yield of chamomile plants as compared to untreated control. The reduction in the developmental stages and build-up of the nematode or increase in all plant growth and yield parameters greatly variedaccording to the type of the tested material. Bacillus thuringiensis karastaki (the major component of Dipel 2x product) seemed to be the most effective biocides in controlling R. reniformis followed by Bacillus subtilis (the major component of Rhizo-Nproduct) while, application of the active ingredient of Plant-Guard product, Trichoderma harzianum was least effective, Also, chopped shoots of Pedilanthus rithymaloides gave highest reductions in numbers of juveniles, females, egg-masses and consequently the rate of build-up (92.6, 84.9, 82, 92.2 and 91.3%; respectively) followed by Cryptostegia grandiflora, Calotropis procera and Euphorbia pulcherrima. These materials also showed significant (p ≤ 0.05 and / or 0.01) improvement in growth and yield of chamomile plants as compared to untreated control.