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M. Sc. Dissertations

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Author: Chauhan, Rahul × End date: 2009 ×
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    ThesisItemOpen Access
    Studies on the emergence of white grubs and their management in groundnut
    (CCSHAU, 2007) Chauhan, Rahul; Dashad, S.S.
    Emergence pattern of white grub beetles in relation with abiotic factors (temperature, relative humidity and rainfall) using light trap and their management in groundnut by using different insecticides/biopesticides as seed treatment and pre-sowing soil application were evaluated during kharif, 2005 at the Research farm of CCS, HAU Regional Research Station, Bawal (Rewari). White grub beetles trapped on light trap were observed from Ist May to end of November. MH-4 cultivar of groundnut was used in RBD design with 3 replications of 15 treatments in 5m x 4m plot size. Chlorphyriphos 20 EC and quinalphos 25 EC @ 15 ml per kg seed were chemical insecticides used while among biopesticides different doses of Pseudomonas maltophila (PM-4) @ 15, 20 and 25 g per kg seed , Pseudomonas spp. (P-7) @ 15, 20 and 25 g per kg seed, Bt (Halt), Bt (Local strain) @ 20 g per kg seed and Azadirachtin 15 EC @ 20 ml per kg seed were used as seed treatment. Phorate 10 G @ 25 kg per hectare and poultry manure @ 2.5 and 5 tonne per hectare were used as pre-sowing soil application and one untreated check (control), were used to study the control of white grub. Emergence of white grub started from 18th standard week after first pre-monsoon rainfall of the season. Total 13 species (1998 beetles) of white grub were reported with maximum number of beetles of Holotrichia consanguinea (1214 beetles) followed by H. serrata (382 beetles). Peak emergence of beetles was reported in the month of July. White grub emergence was positively correlated with the temperature (r = 0.82), relative humidity (r = 0.77) and rainfall (r = 0.69). Groundnut germination was maximum (12.44 plants/2 mrl) in pre-sowing application of poultry manure @ 5 tonne per hectare and seed treatment with Pseudomonas spp. (P-7) @ 25 g per kg seed. Phorate 10 G @ 25 kg per hectare, P. maltophila (PM=4) @ 15.0 and 20.0 gm per kg seed, Bt (Halt) and Bt (Local) @ 20 g per kg seed hampered the germination. Significantly minimum mortality was observed in phorate 10 G (8.97%) followed by chlorpyriphos 20 EC (13.73%) and quinalphos 25 EC (18.87%). Phorate 10 G @ 25 kg per hectare recorded highest net gain over control (31, 830 Rs.) followed by quinalphos 25 EC (28,235 Rs.) and chlorpyriphos 25 EC (26,183 Rs.).
  • Thumbnail Image
    ThesisItemOpen Access
    Studies on the emergence of white grubs and their management in groundnut
    (CCSHAU, 2007) Chauhan, Rahul; Dashad, S.S.
    Emergence pattern of white grub beetles in relation with abiotic factors (temperature, relative humidity and rainfall) using light trap and their management in groundnut by using different insecticides/biopesticides as seed treatment and pre-sowing soil application were evaluated during kharif, 2005 at the Research farm of CCS, HAU Regional Research Station, Bawal (Rewari). White grub beetles trapped on light trap were observed from Ist May to end of November. MH-4 cultivar of groundnut was used in RBD design with 3 replications of 15 treatments in 5m x 4m plot size. Chlorphyriphos 20 EC and quinalphos 25 EC @ 15 ml per kg seed were chemical insecticides used while among biopesticides different doses of Pseudomonas maltophila (PM-4) @ 15, 20 and 25 g per kg seed , Pseudomonas spp. (P-7) @ 15, 20 and 25 g per kg seed, Bt (Halt), Bt (Local strain) @ 20 g per kg seed and Azadirachtin 15 EC @ 20 ml per kg seed were used as seed treatment. Phorate 10 G @ 25 kg per hectare and poultry manure @ 2.5 and 5 tonne per hectare were used as pre-sowing soil application and one untreated check (control), were used to study the control of white grub. Emergence of white grub started from 18th standard week after first pre-monsoon rainfall of the season. Total 13 species (1998 beetles) of white grub were reported with maximum number of beetles of Holotrichia consanguinea (1214 beetles) followed by H. serrata (382 beetles). Peak emergence of beetles was reported in the month of July. White grub emergence was positively correlated with the temperature (r = 0.82), relative humidity (r = 0.77) and rainfall (r = 0.69). Groundnut germination was maximum (12.44 plants/2 mrl) in pre-sowing application of poultry manure @ 5 tonne per hectare and seed treatment with Pseudomonas spp. (P-7) @ 25 g per kg seed. Phorate 10 G @ 25 kg per hectare, P. maltophila (PM=4) @ 15.0 and 20.0 gm per kg seed, Bt (Halt) and Bt (Local) @ 20 g per kg seed hampered the germination. Significantly minimum mortality was observed in phorate 10 G (8.97%) followed by chlorpyriphos 20 EC (13.73%) and quinalphos 25 EC (18.87%). Phorate 10 G @ 25 kg per hectare recorded highest net gain over control (31, 830 Rs.) followed by quinalphos 25 EC (28,235 Rs.) and chlorpyriphos 25 EC (26,183 Rs.).