HOST PLANT RESISTANCE RELATIONSHIPS IN Cicer arietinum (L.) ALONG WITH ITS ECOFRIENDLY MANAGEMENT AGAINST GRAM POD BORER, Helicoverpa armigera (Hubner)
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Date
2017
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DEPARTMENT OF ENTOMOLOGY, SAM HIGGINBOTTOM UNIVERSITY OF AGRICULTURE, TECHNOLOGY & SCIENCES, THESIS Results and Discussion 49 ALLAHABAD, U.P.
Abstract
The present investigation entitled “Host plant resistance relationships in Cicer arietinum (L.) along with its ecofriendly management against gram pod borer, Helicoverpa armigera (Hubner)” was conducted at Central agricultural Research Farm, Sam Higginbottom University of Agriculture Science and Technology, Allahabad. The results revealed that, occurrence and fluctuation of gram pod borer on chickpea crop along with the weather parameters during the period of rabi, 2014-2015 and 2015-2016 reveals that incidence of 0.33 larvae / plant of gram pod borer larvae were observed during 08th standard week during rabi, 2014-2015 but during rabi, 2015-2016 its incidence was observed during 01st standard week with 1.26 larvae / plant. Later gram pod borer population increased and it reached peaks with 4.87 and 3.63 during 13th standard week and 10th standard week during rabi, 2014-2015 and 2015-2016 respectively later declined trend was observed. The correlation analysis showed that, both maximum and minimum temperature, wind speed and sun shine hours were positively correlated during both years.
Among 50 cultivars screened for the resistance / tolerance against gram pod borer with normal and late sowings. With normal sowing these cultivars were found causing less per cent pod damage were JG 315, CSJK 21, JG 130, D 59, ICC 14872, ICCV 08108, RSG 888, ICCL 86105, ICC 07104, ICCV 10, ICCL 86111, JG 16, JG 11, ICCV 09115 and RADHEY with 5.92, 6.18, 7.55, 7.57, 7.65, 7.98, 8.12, 8.15, 8.30, 8.35, 9.60, 9.69, 9.74, 9.81 and 10.06 lower per cent pod damage respectively. The yield of different cultivars was ranged from 2.75 q ha-1 in ICCV 95334 to 14.85 q ha-1 in Radhey. But with late sowing, per cent pod damage was more than normal and it was varied from 24.82 to 67.56 % and these cultivar were found somewhat are ICCV 08107 (24.82 %), RSG 888 (27.22 %), RSG 973 (28.59 %), RSG 902 (29.25 %) respectively. Forty five cultivars were screened for morphological and biochemical characters and found following results that, all biophysical and biochemical parameters were negatively correlated but found non-significant with each other. Higher number of trichome (0.20 cm2) and highest pod wall thickness cultivars were found to be tolerable with damage caused by gram pod borer, but biochemical parameters with higher content found to be least affected by gram pod borer.
Among the treatments treated for management of gram pod borer at field, these treatments i.e. T3 chlorantraniliprole, T5 Indoxacarb, and T6 Flubendiamide were found to be most superior to the rest of treatment by recording 91.88, 90.17 and 88.75 per cent reduction of larvae over control respectively. Pod damage due to pod borer was lowest in plots treated with T3 Chlorantraniliprole (3.56%) followed by Indoxacarb (4.18%), T2 Lambda Cyhalothrin (4.53%) and Flubendiamide (4.81%) which were also found at par with each other. Maximum yield was obtained with T3 Chlorantraniliprole (20.84 q ha-1) followed by T5 Indoxacarb (20.36 q ha-1) and T6 Flubendiamide (20.10 q ha-1). But cost benefit ratio was highest in synthetic Pyrethroid and its combinations, followed by Indoxacarb, Fipronil and diamide group insecticides.
Results and Discussion 66
Among the intercrops, these intercrops were found effective in reducing the gram pod borer larvae and in giving btter yield and chickpea equivalent yield were, Chickpea + Marigold followed by Chickpea + Lentil, Chickpea + Mustard and Chickpea + coriander. Chickpea sole was found to be infested with more gram pod borer larvae. Key Words: Chemicals insecticides, Chickpea, Helicoverpa armigera, Incidence, Intercropping, Screening.
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