BI0-ECOLOGY AND MANAGEMENT OF GROUNDNUT BRUCHID, Caryedon serratus (Ol.) IN GROUNDNUT

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Date
2004
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MPUAT, Udaipur
Abstract
The period of February to April was most favored for egg laying (81.58 eggs) by bruchid, C. serratus. The total developmental period of bruchid varied from 40.54 to 78.35 days during different quarters of whole year. Female life span was longer than male life span, and found significant variation in her life span among different quarters. Jaiphal was most preferred for egg laying by groundnut bruchid, C. serratus in free choice chamber test (124.27 eggs). The studies on development of bruchid on different host revealed that individually tamarind seeds, groundnut pod and groundnut kernel were preferred for egg laying with 67.73, 62.86, 59.41 eggs, respectively. Minimum and maximum time taken for hatching of eggs were observed on tamarind (6.05 days) and on cashewnut (8.80 days). Tamarind was found to be most suitable host for development of larva on which minimum time (20.48 days) required to reach pupal stage and also showed smallest pupal period among different test hosts. Oviposition preference had no relationship with the development of bruchid. Maximum percent adult emergence was observed on tamarind, whereas no adult emerged on dates, coconut and current. Tamarind was the most suitable host for the bruchid on which the total development period was minimum (41.36 days). There was maximum number of eggs laid by C. serratus on ICGV-93133 in free choice chamber test (96.13 eggs). During developmental studies, no significant difference was observed in hatching and pupal period on different germplasm of groundnut, while maximum larval period was found on ICGV-93420 (34.54 days) and minimum on ICGV-92040 (21.12 days). ICGV-92040 was found to be most suitable germplasm of groundnut for the bruchid on which the developmental period was 39.82 days. Pod damage was directly proportional to the population of bruchid development. The damage ranged from 29.53 to 71.33 per cent when groundnut stored for 3 to 9 months. An abrupt increase in damage was observed between three and six months of storage. Loss in weight after three, six and nine months of storage were found 2.23, 13.12 and 27.39 per cent, respectively. The total protein and carbohydrate content of stored groundnut after nine months of storage decreased, while oil content was increased due to infestation of C. serratus. Among different storage receptacles tested, metal bin and earthen pots were found to be better than other receptacles. Deltamethrin 10g/kg appeared to be the best protectant, showing no oviposition, and zero per cent adult emergence, weight loss and damage, even after nine months of storage. Deltamethrin 5 g/kg was the next treatment, while malathion 10 g/kg and black pepper powder 15 g/kg had also shown good effect to control the bruchid. It was found that with the increase in storage period, the effectiveness of all the treatments, except deltamethrin 10 g/kg decreased.
Description
STUDIES ON THE BI0-ECOLOGY AND MANAGEMENT OF GROUNDNUT BRUCHID, Caryedon serratus (Ol.) IN GROUNDNUT
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Citation
Sundhria and Srivastava, 2004
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