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20171
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Subject: Nematology × End date: 2017 × Start date: 2017 × Type: Thesis × Thesis Type: Ph.D ×
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    ThesisItemOpen Access
    Studies on the incidence, interaction and management of root- knot nematode, Meloidogyne incognita and soil borne fungus infesting cucumber in polyhouse
    (CCSHAU, 2017) Jaydeep Ashok, Patil; Sewak Ram
    Survey of polyhouse crops revealed 68.4 %, and 45.8 % frequency of occurrence of root-knot nematode, Meloidogyne incognita, respectively, in Rewari and Jhajjar districts. The fungus, Fusarium oxysporum f. sp. cucumerinum which was found most prevalent during survey of the polyhouse crops proved pathogenic on cucumber. Concomitant and sequential nematode and fungus inoculation resulted in a significant reduction in number of galls per plant. Maximum galling was observed when the nematodes were inoculated 7 days prior to the fungus. Soil treatment with formalin @ 30 %, followed by NSKP as soil amendment @ 30 g per kg soil proved significantly effective in pots against M. incognita and F. oxysporum f. sp. cucumerinum in improving plant growth parameters and reduced nematode reproduction and wilt severity. Seed treatment with liquid formulation of bio-agents @ 15 ml per kg seed followed by seed treatment with neem oil @ 20% v/w in pots proved most effective against M. incognita and F. oxysporum f. sp. cucumerinum. Combinations of soil fumigation with formalin @ 30 % + seed treatment with Paecilomyces lilacinus @ 20 g per kg seed was found highly effective against M. incognita and F. oxysporum f. sp. cucumerinum. Integration of most effective management practices of soil and seed treatment in cucumber against M. incognita and F. oxysporum f. sp. cucumerinum under polyhouse conditions revealed that soil amendment with neem cake @ 200 g per sq meter + seed treatment with P. lilacinus @ 20 g per kg seed in cucumber proved most effective in significantly improving plant growth parameters while soil fumigation with formalin @ 30 250 ml per sq meter + seed treatment with P. lilacinus @ 20 gm per kg seed was significantly better in suppressing nematode reproduction and fungal wilt incidence.