Effects of Botanicals, Myco-Insecticide and Organophosphorous Insecticidal Spray on Biodiversity of Rice Field Arthropods
Journal Title: Journal of Plant Science and Research - Year 2016, Vol 3, Issue 1
Abstract
Field experiments were conducted at APAC farm, Kalavai during samba season (Nov 2012-Jan 2013) to study the effect of insecticidal spray namely Chlorpyriphos 20% EC (Organophosphorus), Beauveria bassiana (Entomopathogen fungus), Vijay Neem (Botanical) on the biodiversity of rice field arthropods. Exactly 2000 m2 (0.5 ac) was taken for each insecticidal spray area. Totally four 0.5 ac fields were adopted for this studies including one unsprayed condition for comparison. The present study was under taken with special reference to collection and identification of insect and spider species; relative abundance of pest, insect predators, parasitoids, neutrals, spider predators and other category; computation of species richness, diversity and evenness indices on the treated rice fields. The study indicated that in Kalavai region, 16 taxa of pests, 10 taxa of insect predators, two taxa of parasitoids and neutrals, eight taxa of other insect categories and one category of spider were observed during the entire season. Considering the sum of all the insects fauna (pests, insect predators, parasitoids, neutrals) and spider predators, relative abundance under Untreated, B. bassiana; Vijay Neem; and Chlorpyriphos 20% EC treated fields were 31.02 %, 27.91%, 22.80% and 18.26% respectively. It was observed that total relative abundance was highest in unsprayed condition followed by B. bassiana and vijay neem treated fields.
Authors and Affiliations
Devarassou K
Keywords
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