Management of citrus nematode (Tylenchulus semipenetrans) by certain plant species

Abstract

The effect of five plant species (Tagetes erecta L., Datura stramonium L., Nerium oleander L., Ipomea palmata L. and Santolina chamaecyparissus L.) on severity of Tylenchulus semipenetrans on citrus rootstocks (Citrus sinensis, C. reticulate grafted on C. aurantium and C. sinensis grafted on C. aurantium) was investigated in greenhouse and laboratory conditions. All plant species reduced the larval population of T. semipenetrans and their effect increase as the period increase. I. palmata gave the highest percentage of reduction when intercropped with C.sinensis and C. reticulate grafted on C. aurantium 20.5 and 25% respectively. N. oleander and D. stramonium came next when intercropped with C. reticulate grafted on C. aurantium 13.5 and 11% respectively, While D. stramonium gave the highest percentage of reduction when intercropped with C. sinensisgrafted on C. aurantium. And T. erecta gave the lowest percentage of reduction when intercropped with the three rootstocks