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Rashid, M.H.,El Taj, H.F.,Jung, C. 한국응용곤충학회 2017 Journal of Asia-Pacific Entomology Vol. No.
<P>Mango leaf cutting weevil, Deporaus marginatus Pascoe (Coleoptera: Curculionidae) is a devastating pest of freshly emerged mango foliage. The immature development, survivorship and adult reproduction of the weevil were investigated on four popular mango cultivars (Langra, Amrapali, Fazli and Ashwina) under the laboratory conditions and life-table parameters were estimated. The immature developmental periods ranged from 17.3 to 19.8 days with female ratio of 5.5-6.2. Ault longevity ranged 43.6 days for female and 66.2 days for males. Effects of the host plant varieties were not significant on the immature development or sex ratio, but significantly influenced the adult performances; longevity, reproduction and also life table parameters. Among the mango varieties tested, Ashwina variety could be the most preferable with higher population growth rate while the Langra and Fazli were the lesser suitable with longer doubling time or lower reproduction. Further study could pursue the nutritional and antibiotic mechanisms which could be responsible for the different performance of the herbivore insect on the mango plants. (C) 2017 Published by Elsevier B.V. on behalf of Korean Society of Applied Entomology, Taiwan Entomological Society and Malaysian Plant Protection Society.</P>
H. F. El Taj,C. Jung 한국응용곤충학회 2008 한국응용곤충학회 학술대회논문집 Vol.2008 No.05
Temperature and humidity are the vital environmental factors influencing the distribution and abundance of ectothermal organisms. Also, these variables often determine the efficacy of biological control of spider mites using phytoseiid mites N. californicus, N. womersleyi and P. persimilis are promising biocontrol agents of spider mites. The combined effects of temperatures (15,20,25,30 & 35oC) and relative humidity (33,51,75 & 95%) on egg hatch, incubation period from single egg and cannibalism from five eggs experiment were tested for three phytoseiid mites. Photoperiod was set to 16L:8D and neither water nor diet was provided. The result showed that higher temperatures (30&35oC) and lower relative humidity (33&51%) caused increased egg mortality by shrinking and desiccation. The egg hatch of N. californicus and P. persimilis were higher than N. womersleyi in all conditions with the exception of 35oC and 95% RH treatment where P. persimilis did not hatch at all. The incubation periods of egg decreased as the humidity level increased even under the same temperature. The cannibalism, habit of feeding the same species was found from protonymphal and deutonymphal stages under higher humidity levels (75&95%) in the three phytoseiid species. This tendency was higher in N. californicus and N. womersleyi than in P. persimilis. The results partially explain the lower predator performance during hot summer by P. persimilis and the possibility to sustain the predator population when the prey population is low.
M.H. Rashid,Hasan F. El Taj,정철의 한국응용곤충학회 2017 Journal of Asia-Pacific Entomology Vol.20 No.2
Mango leaf cuttingweevil, Deporausmarginatus Pascoe (Coleoptera: Curculionidae) is a devastating pest of freshly emerged mango foliage. The immature development, survivorship and adult reproduction of the weevil were investigated on four popularmango cultivars (Langra, Amrapali, Fazli and Ashwina) under the laboratory conditions and life-table parameters were estimated. The immature developmental periods ranged from 17.3 to 19.8 days with female ratio of 5.5–6.2. Ault longevity ranged 43.6 days for female and 66.2 days for males. Effects of the host plant varieties were not significant on the immature development or sex ratio, but significantly influenced the adult performances; longevity, reproduction and also life table parameters. Among themango varieties tested, Ashwina variety could be the most preferable with higher population growth rate while the Langra and Fazli were the lesser suitable with longer doubling time or lower reproduction. Further study could pursue the nutritional and antibiotic mechanismswhich could be responsible for the different performance of the herbivore insect on the mango plants.