Toxicity and Biochemical Effect of Organophosphates and Bio-pesticides Against Root-knot Nematode, Meloidogyne Incognita

This study was carried out to investigate the toxicity and Biochemical effect of two (biopesticides) biofly, abamectin and two organophosphates pesticides cadusafos and fenitrothion against root-knot nematode, Meloidogyne incognita egg filtrates and second stage juveniles (J2) as well as on laboratory experiment, also the inhibitory effect of the tested pesticides to acetylcholenesterase (AChE) and adenosine triphosphatase (ATPase) were determined. Results indicated that the tested pesticides have toxic action against Meloidogyne incognita second-stage juveniles (J2) and egg filtrates after 24 hrs from application to 72 hrs and the toxicity increased with the time. Abamectin was most toxic followed by cadusafos , fenitrothion and biofly was least in its toxicity to M. incognita second stage juveniles (J2 )and egg filtrates while the toxicity are depending on dose. The tested pesticides have inhibitory effect on AChE and ATPase activity and the inhibitory effect increased with AChE in case of abamectin and cadusafos while the potency of the organophosphate pesticides to inhibit ATPase were limited refers to its mode of action.