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Biology and management of painted bug, Bagrada hilaris (Burmeister) on rapeseed-mustard

KrishiKosh

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Title Biology and management of painted bug, Bagrada hilaris (Burmeister) on rapeseed-mustard
 
Creator Madan, Bawaskar Dutta
 
Contributor Lal, Roshan
 
Subject bugs, animal developmental stages, genotypes, crops, insecticides, sowing, eggs, mustard, planting, sexual reproduction
 
Description Studies on biology and management of painted bug, Bagrada hilaris (Burmeister) on rapeseed-mustard were carried out during 2013-15, in the laboratory of the Department of Entomology and research area of Oilseeds Section, Department of Genetics and Plant Breeding, CCS HAU, Hisar. The biology of B. hilaris was studied on different genotypes of rapeseed-mustard viz., Brassica rapa var. brown sarson (Cv. BSH 1), B. rapa var. toria (Cv. Sangam), B. juncea (Cv. RH 30) and B. napus (Cv. GSL 1) and B. carinata (Cv. Pusa Swarnim) in the laboratory in an incubator maintained at 28±2°C with 12 hr photoperiods. Observations on biology of the pest on different rapeseed-mustard genotypes indicated that the pest had egg, five nymphal instars and adult stage. The mean duration was 3.15-4.15, 4.06-5.12, 4.70-5.71, 4.90-6.09 and 4.98-6.19 days for the first instar, second instar, third instar, fourth instar and fifth instar, respectively. The adult female had a pre-mating, pre-oviposition, oviposition and post oviposition period of 1.12-1.31, 4.33-5.22, 9.75-10.87 and 2.47-3.40 days, respectively. The adult male lived for 16.89-18.08 days while female lived 18.79-19.68 days. Male and female completed their life span in 26.74-32.49 and 26.55-32.55 days, respectively. An adult female laid on an average 55.26-65.22 eggs (one pair per replication) and 76.38-95.54 eggs (25 pairs per replication). The mean incubation period of eggs varied from 5.04-5.40 days. The mean per cent mortality on different rapeseed for different stages as egg nymph and adult were 4.80-7.74, 37.14-55.59 and 7.30-13.41 per cent respectively. The order of indices for the growth and development of the painted bug from most preferable to least preferable genotypes was Brassica rapa var. brown sarson > B. rapa var. toria > B. juncea > B. napus > B. carinata.
Population dynamics study of B. hilaris nymphs and adults on RH 30 showed that the pest reached its peak population twice in the cropping season once at the seedling stage and another at the maturity stage on both early and late sown crop. The maximum population on early sown crop was observed with its first and second peak observed on 48th SW and 12th SW, respectively. While in the late sown crop the peaks in the pest population noticed on 50th SW and 17th SW of 2013-14 and 2014-15. The pest population had significant positive correlation with maximum temperature and sun shine hours on both early and late sown crops. However, the correlation with minimum temperature was non-significantly positive in early sown crop compared to significant positive correlation in late sown crop. Morning and evening relative humidity showed highly negative significant correlation with the pest population. Wind speed had a significant negative effect on painted bug population in crop sown early in the season while the effect was positive and non-significant in late sown crop. All weather parameters contributed to B. hilaris population fluctuation to the extent of 66 to 69 and 46 to 86 per cent during 2013-14 and 2014-15 respectively.
Study on screening of different rapeseed-mustard genotypes against painted bug on the basis population count (nymph + adult) revealed that three genotypes were found least susceptible, 28 moderately susceptible, 13 susceptible and 6 highly susceptible. The genotypes YSH 0401 (0.56 bugs/mrl), Pusa Swarnim (0.60 bugs/mrl) and JMM 927(0.67 bugs/mrl), were found least susceptible, while genotypes, RH 0555 (3.52 bugs/mrl), RH 0749 (3.28 bugs/mrl), Rohini (3.38 bugs/mrl), Varuna (3.37 bugs/mrl), RH-30 (3.30 bugs/mrl) and BSH 1(3.26 bugs/mrl) were found highly susceptible and other showed moderate response. Seed treatment with imidacloprid 600 FS and thiamethoxam 35 FS was found effective in managing painted bug population at initial stage of crop. Among the insecticides applied as foliar spray, imidacloprid 17.8 SL (78.33%) and thimethoxam 25 G (76.18%) found to be most effective, while dimethoate 30 EC (62.35%), profenophos 50 EC (63.76%), malathion 50 EC (63.28%), chlorpyriphos 20 EC (60.25%) and quinalphos 20 EC (60.18%) were found moderately effective. The treatment with nimbecidine was found least effective but superior over control (47.86%) against the painted bug. Based on the economic returns imidacloprid 17.8 SL, imidacloprid 600 FS and thimethoxam 25 G were adjudged as best treatments for the effective management of painted bug.
 
Date 2016-02-01T09:31:11Z
2016-02-01T09:31:11Z
2015
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/64123
 
Language en
 
Format application/pdf
 
Publisher CCSHAU