THE ROLE OF ORGANIC MATTER IN THE REDUCTION OF SOIL BIOCONTAMINATION DUE TO THE USE OF AGRICULTURAL INSECTICIDES

Abstract

A study was carried out using the insecticide (Endosulfan) with different proportions of the organic matter to determine the ability of the organic matter on the reduction of bio-contamination (the total number of microbes) by using this insecticide during different intervals. The results showed that the highest impact of the insecticide on the microbes numbers was (80778) logarithm without the presence of organic matter when the incubation period was (60) days. This period exceed all the other periods of time; the highest rate for this trait was (9600) logarithm with significant difference comparing with the period (20) days where the number was (80957) logarithm. The results indicated the existence of a significant effects of the insecticide on the number of microbes in the presence of organic matter, reaching the highest number of microbes (90850) logarithm with organic matter (clover) compared with the concentration (double the recommended dose), which gave lower rate (90288) logarithm. The results revealed significant effects of the triple interaction for the insecticide concentration; the lowest number of microbes was (90 101) logarithm for the concentration (double the recommended dose) of the insecticide. The results of the double interaction also showed significant differences, reaching the highest number with organic matter (clover) about (90715) logarithm when the incubation period was (60) days.