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Subject: Plant Pathology × Author: Binimol, K S × Author: KAU × End date: 2000 × Start date: 2000 × Type: Thesis ×
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    ThesisItemOpen Access
    Integrated management of phytophthora rot in black pepper nursery
    (Department of Plant Pathology, College of Horticulture, Vellanikkara, 2000) Binimol, K S; KAU; Vilasini, T N
    Studies on the 'Integrated management of Phytophthora rot in black pepper nursery' was conducted at the College of Horticulture, Vellanikkara during January to August 1998. Potting mixture was inoculated with Phytophthora capsid Leonian, emend. Alizadeh and Tsao before solarization. Transparent, 150 guage polyethylene sheets were used for solarization of the potting mixture. Maximum soil temperatures recorded at 10 cm depth III solarized potting mixture was 51.0°C while, it was 42.0°C in non-solarized one. Soil temperature of solarized potting mixture was more than 45°C for 40 days and above 50°C for four days. Solarization enhanced the sprouting of pepper cuttings. Solarization was effective in reducing the pre-sprouting mortality and mortality of rooted cuttings by the pathogen.F ortyfive days solarized, Trichoderma viride incorporated Fytolan drenched treatment exerted cent per cent control of the mortality of rooted cuttings. Solarization significantly reduced the foliar infection of rooted cuttings. Forty five days solarized, T viride incorporated treatment was highly effective and recorded 97.22 per cent control of the disease. Maximum disease incidence (87.58%) was noticed in the non-solarized control. Reduction in Phytophthora population ranged from 94.41 to 97.35 per cent in solarized potting mixture immediately after the removal of polyethylene sheets. Maximum population of Trichoderma spp. was observed in solarized Trichoderma spp. incorporated treatments. Solarization reduced fungal, bacterial and actinomycetes population of potting mixture. Plants grown in solarized potting mixture exhibited better colonization of Azospirillum. However, root colonization of V AM in pepper cuttings was less in solarized treatments. Availability of nitrogen, phosphorus and potassium was increased by solarization. Solarization effectively reduced the weed population ill the pepper nursery. Solarization resulted in increased growth response of rooted pepper cuttings. All growth parameters like height of plants, number of leaves, length and breadth of leaves and development of root system were influenced by solarization.