Biology and functional Response of Andrallus spinidens (F) to the rice army worm Spodoptera mauritia (Boisduval)
Authors
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ICAR- Indian Institute of Rice Research, Rajendranagar, Hyderabad – 500030, Telangana State
Chitra Shanker -
ICAR- Indian Institute of Rice Research, Rajendranagar, Hyderabad – 500030, Telangana StateP. Sapna
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ICAR- Indian Institute of Rice Research, Rajendranagar, Hyderabad – 500030, Telangana StateK. Shabbir
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ICAR- Indian Institute of Rice Research, Rajendranagar, Hyderabad – 500030, Telangana StateV. Sunil
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ICAR- Indian Institute of Rice Research, Rajendranagar, Hyderabad – 500030, Telangana StateB. Jhansi Rani
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ICAR- Indian Institute of Rice Research, Rajendranagar, Hyderabad – 500030, Telangana StateGururaj Katti
DOI:
https://doi.org/10.18311/jbc/2017/16279Keywords:
Spiny soldier bug, attack ratio, handling time, searching time, predatory potentialAbstract
The pentatomid bug, Andrallus spinidens (F.), is a polyphagous predator on lepidopteran larvae in rice fields in India. The basic biology and predatory potential of the bug was studied under laboratory conditions. The nymphs were reared in petri dishes and were fed 3rd to 5th instar Spodoptera mauritia (Boisduval) larvae. The mean development period from egg to adult was 21 days. Eggs were laid in batches of 45 to 95 and the mean total number of eggs laid by each female was 259. The second, third and fourth stage nymphs fed on 7.99, 8.32, 26.33 number of third instar larvae instar larvae of S. mauritia, respectively. The predator exhibited a type II functional response to S. mauritia larvae with a disc equation of Y' = 0.41(5-0.74) x to the increasing density of S. mauritia. This study provides important life history information for using the predator A. spinidens as a possible biological control agent for army worm management in rice.
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