Nutritional management of bitter gourd (Momordica charantia L) in relation to pest and disease incidence
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Date
1999
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Department Of Olericulture, College Of Horticulture, Vellanikkara
Abstract
Investigation on "Nutritional management of bitter gourd (Momordica
charantia L.) in relation to pest and disease incidence" was conducted at the
College of Horticulture, Kerala Agricultural University, Vellanikkara, Thrissur
during kharif (May to October 1997), rabi (September 1997 to January 1998) and
Summer (January to May] 998) seasons, by using the variety Preethi. The different
sources levels and frequencies of application of organic manures and inorganic
fertilizers, constituting eight treatments did not effect significantly on the
occurrence of pests like fruit fly (Bactrocera cucurbitae), jassids (Empoasca mottiy,
epilachna beetle (Henosepilachna septima) and diseases like mosaic and downy
mildew (Pseudoperenospora cubensisi. Seasonal influence was observed on the
occurrence of above pests and diseases. Among the pests and diseases affecting the
crop, mosaic disease and jassids caused drastic reduction in the crop growth and
productivity. Fruit fly infestation was at its peak during rainy season while
epilachna beetle and downy mildew during rabi season. Incidence of jassids and
intensity of mosaic was maximum during summer season. Productivity of the crop
(12.1 t ha-1) and size of fruits in terms of weight (247.58 g) length (23.61 cm) and
girth (17.l3 cm) was maximum during rabi season. The treatment T7 which
received 20 t ha-1 of FYM, 2.5 t ha-1 of poultry manure, 2.5 t ha-1 of fresh cowdung
slurry drenching with NPK @ 70:25:50 kg ha-1 had maximum productivity with
maximum fruit size in all the three seasons. Yield in T, which received 20 t ha-1
of FWM as basal and 2.5 t ha-1 of poultry manure at vining stage and 2.5 t ha-1
cowdung slurry drenching at fortnightly interval was double than that in T I which received 25 t ha-1 of FYM only.
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PG
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Citation
171471