author(s)
J Kousika, S Kuttalam And M Ganesh Kumar

abstract
A field experiment in rice was conducted to study the insecticide effect of tetraniliprole 20 SC, a new chemistry of pyridine derivative on arthropod biodiversity during 2014 in Boluvampatti, Coimbatore, India. A total of 5,095 individuals belonging to 90 species, 84 genera, 54 families and 11 orders were recorded in rice ecosystem from two classes viz., Insecta and Arachnida. Hemiptera and Hymenoptera were predominant in terms of individuals of exopterygota and endopterygota, respectively. Among exopterygota, maximum individuals were recorded in the order Hemiptera (781) followed by Orthoptera (127), Thysanoptera (85), Odonata (22), Dermaptera (18) and Dictyoptera (11). Under Arachnida, Araneae was the most dominant order with maximum individuals belong to Tetragnathidae. The biodiversity indices revealed that based on familial level, Species richness indices viz., species number (51), Fishers alpha index (16.483), Q Statistic (16.11), Margelef D index (8.548), Shannon - Weiner index (3..2863) and Brillouin diversity index (3.063), the value was highest in unsprayed field and it was maximum in the month of October.