Distribution of injected pesticides in date palm trees

Abstract

The insecticides Rogodial (dimethoate + phenthoate), Actellic (primiphos-methyl), Salut {(chlorpyrifos-ethyl) + dimethoate}, Reldan (chlorpyrifos-methyl) and Karate (lambda-cyhalothrin) translocation and movement in date palm trees were evaluated. It found that the systemic and non-systemic insecticides moved out of injection pores. The injected pesticides detected 10 Days post Injection (DPI) at one meter above the injection point in the same and opposite side of injection pore. The five individual injected pesticides distributed downward at concentrations of 0.01, 0.011, 0.009, 0.011 and 0.009 mg/kg of actellic, salut, karate, reldan and rogodial respectively. At 20 DPI all studied pesticides were detected in the pith at 2m above the injection side either individually or mixture injected pesticides, Similarly, the pesticides were found to be distributed downward at concentrations of 0.042, 0.036, 0.005, 0.019 and 0.025 mg/kg of actellic, salut, karate, reldan and rogodial respectively. The residues of four insecticides detected in dates 100 DPI, the insecticide residue levels of karate in the dates were 0.0034 & 0.019 of mixed and individual injected pesticides respectively which were the highest levels at 100DPI.