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Ardhendu Chakraborty ¹, Dipak Nath ¹

Affiliations
1 Krishi Vigyan Kendra, DIVYODAYA (WEST TRIPURA), IN

Abstract

A supervised field experiment was conducted in the chilli during Rabi, 2014-15 to study the impact of certain biopesticides in leaf curl disease and its vectors viz., thrips and mites. The treatments were application of Nanma @ 1 per cent (T₁), application of neem oil 0.15EC @ 0.3 per cent (T₂), application of Sonata @ 0.1 per cent (T₃), alternate spray of T₁, T₂ and T₃ (T₄) and untreated check (T₅). It was found that thrips and mites population was higher in untreated check (0.80 and 1.39, respectively) while a low population was recorded in the treatment with the alternate spray of T₁, T₂ and T₃ (0.10 and 0.16, respectively). Similarly lowest leaf curl index was recorded in alternate spray of T₁, T₂ and T₃ (T₄) (0.20) followed by application of neem oil 0.15EC @ 0.3 per cent (T₂) (0.21). It can be concluded that alternate spray of nanma @ 1 per cent, neem oil 0.15 EC @ 0.3 per cent, sonata @ 0.1 per cent can reduce leaf curl disease incidence in chilli.

Keywords

Chilli, Biopesticide, Leaf Curl Disease, Vectors Population, Thrips, Mites.

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Dipankar Dey ¹, Dipak Nath ¹, Lord Litan Debbarma ¹, Subhra Shil ¹, Suresh Chandra Biswas ¹, Ardhendu Chakraborty ¹, Rajib Das ¹, Nurul Islam ¹, Subrata Choudhury ¹, Prasanto Reang ¹

Affiliations
1 Krishi Vigyan Kendra, Khowai (Tripura), IN

Abstract

North Pulinpur with GPS location 23°52.836¹ N, 91°35.275¹ E and elevation 47m is one of the draught prone tribal inhabited ADC village of the district Khowai under the state Tripura. The total geographical area of the village is 950 hectare with cultivable area of about 250 hectare only among 806 farm families. So, most of the families are holding either small or marginal farms. There was no perennial streams, rivers, ponds and other irrigation facilities in the village. Prevailing temperature ranges from 16°C to 37°C. Annual rainfall ranges from 2050 to 2550 mm, but almost whole amount goes out to neighboring lower elevated village. Agriculture is the mainstay of the people, about 85 per cent of them engage in agriculture and its allied activities. Farmers earned their livelihood from rainfed rice based monocropped cultivation. Moisture stress during Kharifdry spell and winter season which lead to rice based mono-cropping system. Under the National Innovations in Climate Resilient Agriculture(NICRA) Project KVK,Khowai has constructed and rejuvenated 22 water bodies from 2011-12 to 2018-19 at North Pulinpur ADC village; all of which provided life saving irrigation for paddy during Kharifdry spell as well as during Rabiseason through nano pumps installed nearby farm ponds. Before implementation of NICRA project to North Pulinpur ADC village, most of the areas remain dry during Rabi season. After the intervention, approximately 26187 ft 3 rainwater had been harvested covering an area of about 135.0 ha. for winter vegetables and Rabi maize cultivation and during dry period. In addition to this, a total area of about 1 ha waste land had been converted to paddy land using water from community bund. Ponds were also used for composite fish culture with average yield of 30 q/ farmer/year/ha during 2018-19.

Keywords

NICRA, KVK Khowai, Paddy.

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