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Yadav, D. N.
- Mass Rearing Technique of Eublemma scitula Ramb. (Lepidoptera: Noctuidae) an Important Predator of Brown Scale, Saissetia coffeae Walker
Abstract Views :199 |
PDF Views:102
Authors
S. K. Pathak
1,
D. N. Yadav
2
Affiliations
1 Tea Research Association. 15 Cooch Behar Road. Darjeeling 734101, West Bengal, IN
2 Department of Entomology, B.A. College of Agriculture Gujarat Agricultural University Anand Campus, Anand 388110, Gujarat, IN
1 Tea Research Association. 15 Cooch Behar Road. Darjeeling 734101, West Bengal, IN
2 Department of Entomology, B.A. College of Agriculture Gujarat Agricultural University Anand Campus, Anand 388110, Gujarat, IN
Source
Journal of Biological Control, Vol 17, No 1 (2003), Pagination: 91-94Abstract
Three different methods were tried to find out suitable laboratory technique for mass rearing of Eublemma scitula Ramb. (Lepidoptera: Noctuidae) an important predator of brown scale insect Saissetia coffeae Walker (Homoptera: Coccidae) a serious pest of pointed gourd, Trichosanthes dioica Roxb in and around Anand, Gujarat. Out of these rearing methods, namely, a) on pointed gourd leaves, b) on green potato sprouts and c) on pumpkin fruits, the method c), which involved either releasing E. scitula eggs (c 1) or larvae (c 2) on pumpkin fruit with growing scale population was observed to be the best for mass rearing of the predator with seed to yield ratio of 1: 0.63 and 1: 0.73 in c 1 and c 2, respectively. On an average, 69.4 and 73 pupae could be produced in methods c 1 and c 2, respectively. from a single pumpkin in a single generation of the scale, within two months (October to November). The technique was found to be suitable for mass rearing of E. scitula to augment the predator during June July for suppression of the host S. coffeae at its initial stage of infestation. Limitations observed in other methods of rearing were described.Keywords
Biocontrol, Eublemma scitula, Saissetia Coffeae, Trichosanthes dioica.- Observations on the Biology of Oxyopes ratnae Tikadar (Arachnida: Oxyopidae) Occurring on Cotton
Abstract Views :260 |
PDF Views:128
Authors
F. K. Dhulia
1,
D. N. Yadav
1
Affiliations
1 AICRP on Biological Control of Crop Pests and Weeds, Gujarat Agricultural University, Anand - 388 110, IN
1 AICRP on Biological Control of Crop Pests and Weeds, Gujarat Agricultural University, Anand - 388 110, IN
Source
Journal of Biological Control, Vol 8, No 2 (1994), Pagination: 94-97Abstract
Studies on the biology of Oxyopes ratnae Tikadar showed that the spider laid on an average 2.8 egg masses during the life span. The average incubation period was 10.1 ± 0.74 days and number of spiderlings emerging per egg mass varied from 30-42, with an average of 35.6 ± 3.82. Males and females passed through 10 and 11 instars, respectively to reach maturity. Male and female spiderlings took an average of 187.20 ± 4.87 and 259.50 ± 4.18 days, respectively to complete the development from egg to adult. The total average life span of adult in case of male and female was 305.8 and 358.80 days, respectively. The males and females mated readily under laboratory conditions, the mating lasted for a few seconds. Mortality during different instars varied from 4.00 to 70.64 %. The females spun silken cocoons before laying eggs and covered them with silken threads. It was also found to take care of the eggs by sitting over them.Keywords
Oxyopes ratnae, Biology, Cotton.- Biology and Feeding Potential of Mallada boninensis (Okamoto), a Chrysopid Predator of White Fly Bemisia tabaci Gennadius
Abstract Views :257 |
PDF Views:200
Authors
B. C. Joshi
1,
D. N. Yadav
1
Affiliations
1 All India Coordinated Research Project on Biological Control of crop pests and weeds, Gujarat Agricultural University, Anand-388 110, IN
1 All India Coordinated Research Project on Biological Control of crop pests and weeds, Gujarat Agricultural University, Anand-388 110, IN
Source
Journal of Biological Control, Vol 4, No 1 (1990), Pagination: 18-21Abstract
Biology and feeding potential of a chrysopid, Mallada boninensis Okamoto, recorded by us for the first time from Gujarat, were studied under laboratory conditions. The predator laid stalked eggs in groups usually of 11 to 20. The larvae with the habit of carrying trash on its back passed through three Instnrs, the durations of which were 4.11, 4.11 and 4.63 days at a constant temperature of 25.26 ± 2.2 °C and 59.90% RH. The short prepupal and pupal periods averaged 5 to 7 and 13.79 days respectively. The female was slightly bigger than male. The sex ratio of male:female was 1:1.5 with 81.40 per cent emergence of adults. Pre oviposition, oviposition and post-oviposition periods averaged 9.90 ± 1.60, 36.90 ± 4.41 and 18.00 ± 12.24 days respectively. The total number of eggs laid by the female averaged 431 ± 38.62 eggs. The average longevity of females and males were 64.8 ± 15.97 and 27.36 ± 8.03 days respectively. The larva consumed on an average 628.75 eggs of Corcyra cephalonica Stainton and 453 nymphs of white flies.Keywords
Mallada boninensis, Bemisia tabaci, Corcyra cephalonica, Development, Biology, Feeding Potential.- Effect of Bird Predation and Egg Parasitism on Castor Semilooper Achaea janata Linn. (Lepidoptera: Noctuidae) in Gujarat
Abstract Views :231 |
PDF Views:137
Authors
Affiliations
1 Dept. of Entomology, Gujarat Agricultural University, Anand 388 110, IN
1 Dept. of Entomology, Gujarat Agricultural University, Anand 388 110, IN