Laboratory Evaluation of the Insecticidal Toxins from Entomopathogenic Nematode Symbiotic Bacteria to Control Vegetable Diseases and Pests

Aims: Entomopathogenic nematode (EPN) and its symbiotic bacterium are used worldwide as microbial control agents. Toxins from EPN bacteria were isolated provided basis for using this potential resource biocontrol agent against vegetable diseases pests.
 Study Design: The toxins extracted 28 strains of associated with entomopathogenic nematodes. insecticidal activity antibiotic pests determined through bioassay.
 Place Duration Study: College Bioscience Biotechnology, between May 2020 September 2021.
 Methodology: by (NH4)2SO4 precipitation method. activities evaluated bioassay in the laboratory.
 Results: had certain on first instar larvae Plutella xylostella Laphygma exigua, strain SY5 showed most obvious antifungal Trichothecium roseum Fusarium oxysporum.
 Conclusions: good activity. Therefore, it has use