Analysis Of Leisa System Impact On Pest And Disease Attack On Seed Potatoes

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Ketut Ayu Yuliadhi, Yohanes Setiyo, Bambang Admadi Harsojuwono, Ida Bagus Wayan Gunam

Abstract

The development of granola potato varieties in Bali for main, basic and scattered seeds group has a potency. The research objective was to identify pests and diseases in potato cultivation in the highlands of 900 - 1300 m asl in cultivation with the LEISA system. The cultivation experiment used the LEISA system with granola potato varieties in the G0, G1, G2 and G3 groups on an area of ​​1000 m2. The potato plants are fertilized with compost at a dose of 20 tones / ha and NPK at a dose of 250 kg / ha. Treatment of plants by spraying using insecticides and fungicides intensively. The research data included: quality of seeds, quality of planting media, plant growth, attack of pests and diseases in plants besides potato tubers and plant productivity. The seed potatoes used met the seed standards with identification of less than 2.5% damage, and the experimental area was less sterile with the presence of white grubs and Fusarium bacteria. The rate of change in plant height and total biomass of potato plants in the vegetative phase was 0.8 - 1.2 cm / day and 15 - 48 g / week, the identification of pests and diseases in plants was 1.4 - 6.4%. The identification of damage of the cultivated seed potato tubers using the LEISA system was 1.87 - 3.88%.

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