Evaluation of a microgel droplet formulation of Bacillus sphaericus 1593 M (Biocide-S) for control of mosquito larvae in rice fields in southern India.
A new microgel droplet formulation of Bacillus sphaericus 1593 M (Biocide-S) was tested at 2 rates against culicine vectors of Japanese encephalitis and Anopheles subpictus. A single application just after transplantation of rice seedlings prevented the buildup of anopheline as well as culicine populations, and gave 83-100% reduction of pupal density at the lower rate (2.2 kg/ha) and 87-100% reduction at the higher dosage (4.3 kg/ha) for at least 5 weeks. During the last 3 wk before harvest, density was naturally very low and the efficacy of the treatment could not be assessed. This formulation has a potential for control of riceland mosquitoes, but a suitable delivery system is required before it can be considered for practical control.
Sundararaj
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R
Centre for Research in Medical Entomology (CRME), Madurai, India.
Reuben
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R
D000383:Agriculture; D000818:Animals; D000852:Anopheles; D001427:Bacterial Toxins / Q000737:chemistry*; D003465:Culex; D007194:India; D007814:Larva; D012275:Oryza; D010572:Pest Control, Biological; D011159:Population Surveillance; D011679:Pupa
D001427:Bacterial Toxins; C057949:toxin 1593 (Bacillus sphaericus)