Vol. 6, Issue 1 (2018)
Assessment of the efficacy of certain chemical insecticides against rice gundhi bug, Leptocorisa acuta (Thun.) in Naini, Allahabad region
Author(s): Vikam Tigga, Ashwani Kumar, Pushpendra Singh Sahu, Hadi Husain Khan and Huma Naz
Abstract: The occurrence of gundhi bug commenced from 37th standard week (September 2nd week) with an average 0.57 gundhi bug per hill. The gundhi bug infestation increased and gradually reached peak level of 3.025 gundhi bug per hill at 41st standard week (October 2nd week). Thereafter, declined trend was observed due to fall of maximum and minimum temperatures as optimum weather condition are decreasing. Therefore Percent infestation was positively correlated with the maximum temperature. Hence decline of temperature lead to the decline of the gundhi bug infestation.
The spray was taken for the management of gundhi bug. The different insecticides were evaluated by given foliar spray rice crop in field condition; the data on the gundhi bug per hill of after spray revealed that all the chemical treatments were significantly superior over control. Among all the treatments lowest gundhi bug population per hill was recorded in Imidacloprid (0.700) followed by Thiamethoxam (0.844), Monocrotophos (0.881), Triazophos (0.906), Acephate (1.031), Carbaryl (1.088) and Malathion (1.156) as compared to Control.
The yields among the treatment were significant. The highest yield was recorded in Imidacloprid (44.200 q/ha) followed by Triazophos (43.500 q/ha), Thiamethoxam (43.200 q/ha), Monocrotophos (43.000 q/ha), Acephate (41.600 q/ha), Carbaryl (39.500 q/ha), Malathion (38.400 q/ha) as compared to control (28.000 q/ha).
When cost benefit ratio was worked out, interesting result was achieved. Among the treatment studied, the best and most economical treatment was Imidacloprid (1:3.390), followed by Triazophos (1:3.340), Monocrotophos (1:3.246), Acephate (1:3.192), Thiamethoxam (1:3.115), Carbaryl (1:3.067), Malathion (1:2.833) as compared to control (1:2.234).
Pages: 959-961 | 956 Views 86 Downloads
download (3727KB)
How to cite this article:
Vikam Tigga, Ashwani Kumar, Pushpendra Singh Sahu, Hadi Husain Khan, Huma Naz. Assessment of the efficacy of certain chemical insecticides against rice gundhi bug, Leptocorisa acuta (Thun.) in Naini, Allahabad region. Int J Chem Stud 2018;6(1):959-961.
