Tuesday, 17 April 2012

Chilli Thrips complete details

Chilli Thrips


Thrips cause serious economic losses in many agricultural systems each year including vegetables and ornamentals. Scirtothrips dorsalis is a widespread pest, described as a new species by Hood in 1919. S. dorsalis is a very small (0.5 to 1.2 mm), pale yellow-colored thrips that can be found feeding on leaves, flowers, and calyxes of fruit on a wide variety of host crops. It is difficult to recognize this thrips with the naked eye, and definitive identification is best accomplished at approximately 40 to 80 x magnification. Introduction

Economic important: 

Economic important According to Mound and Palmer (1981), S. dorsalis is a pest of strawberries in Queensland, Australia; a pest of tea in Taiwan; a major pest of citrus in Japan and Taiwan (Chiu et al. 1991, Tatara and Furuhushi 1992, Tschuchiya et al 1995); cotton in the Ivory Coast ( Bournier 1999); soybeans in Indonesia (Miyazaki et al.1984) and a serious pest of chillies and castor bean in India. It is a major pest of peanuts in several states in India (Mound and Palmer 1981). Severe infestations of S. dorsalis can result in total defoliation and potentially heavy crop loss. Ananthakrishnan (1984) also reports damage to the following hosts: cashew, tea, chillies , cotton, tomato, mango, castor bean, tamarind, and grape.