Abstract
This study was conducted to determine the effect of microbial pesticide on growth of micro animals such as protozoa and metazoa from measuring specific growth rate (μ) and maximum individual number (Nmax) of these micro animals. As a result, protozoa such asCyclidium glaucoma, Tetrahymena pyriformisandColpidium campylumandmetazoasuch asPhilodina erythrophthalmaandAeolosomahemprichi were able to grow in culture of bacterial insecticide such asBacillus thuringiensissubsp.aizawaiKH, B.t.kurstakiandPseudomonas fluorescensIID5115, but could not grow in culture of fungal insecticide such asBcauveria bassianaandTrichoderma harzianum.These outcomes suggest that bacterial insecticide will decrease after spreading to environment, but fungal insecticide will survive. So, it was considered that environmental assessment have to be done carefully before using microbial pesticide.
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