International Journal of Plant Protection

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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Subhra Shil ¹, Dipak Nath ¹

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

Abstract

The experiment was conducted in a village of Gourangatilla, Khowai district of Tripura with full technical support and investigation of Krishi Vigyan Kendra scientists during 2013-14. The main objective of the experiment was to evaluate the performance of this high yielding variety of colocasia in comparison with local variety. It has been reported from the investigation that the variety Muktakeshi is better than the local variety in terms of yield, pest and disease per centage, eating quality with good size and shape. In case of var. Muktakeshi a highest yield of 140 q/ha and an average yield of 129 q/ha has been recorded while in case of local check average yield 100 q/ha was observed.

Keywords

Colocasia, Varietal Evaluation, Tripura.

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