Journal of Entomological Research
Year : 1994, Volume : 18, Issue : 3
First page : ( 189) Last page : ( 197)
Print ISSN : 0378-9519.

Insect-plant relationships determining resistance in rice to Sogatella furcifera (Horvath)

Bhathal J.S., Dhaliwal G.S.

Department of Entomology, Punjab Agricultural University, Ludhiana-141 004 (India).

Accepted:  10  August,  1994.

Abstract

Various insect-plant interactions were investigated to determine resistance or susceptibility in rice varieties to Sogatella furcifera (Horvath). Orientational response of S. furcifera was identical on all the test varieties. However, a significant reduction in settling of nymphs as well as adults was observed on NCS 2041, ARC 11367 and PR 109 than on TN 1. The proboscis response was high and duration of feeding was short on all test varieties than on TN 1. S. furcifera laid about 4–5 times more eggs on TN 1 than on NCS 2041 and ARC 11367, and about two times more than on PR 109. Fecundity of S. furcifera on TN 1 plants was about 33 times more than on NCS 2041 and ARC 11367 and about 1.5 times more than PR 109. The growth index of S. furcifera was minimum on NCS 2041 (3.95) followed by ARC 11367 (4.32), PR 109 (5.47) and TN 1(7.68). Consumption index of S. furcifera females on NCS 2041, ARC 11367, PR 109 and TN 1 was 0.729, 0.669, 1.223 and 2.150, respectively. However, there were no differences in nutritive value of these varieties to S. furcifera. Therefore, resistance in NCS 2041 and ARC 11367 seems to be due to antixenosis for feeding and oviposition coupled with antibiosis.

Top