ECO-FRIENDLY MANAGEMENT OF SUCKING AND OTHER FOLIAR INSECT PESTS OF BRINJAL

Abstract

A field experiment was conducted in the experimental field of Sher-e-Bangla Agricultural University to find out the effective environment friendly management practice(s) of brinjal, cultivated during Rabi season (November, 2017 to March, 2018). The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. The experimental treatments were T (spraying of neem oil @ 3 ml neem oil and 10 ml trix mixed with 1 liter of water @ 7 days interval); T 1 (spraying of neem seed kernel extract @ 5.0 ml/L of water at 7 days interval); T 3 2 (spraying of bioneem plus @ 3.0 ml/L of water at 7 days interval); T (spraying of Marshal 25 EC@ 3.0 ml/L of water at 7 days interval); T (spraying of Actara 25 WG @ 0.2 gm/L of water at 7 days interval); T 6 5 (spraying of Imitaf 20 SL @ 0.1 ml/L of water at 7 days interval); T 7 (spraying of Ripcord 20 EC @ 1.0 ml/L of water at 7 days interval) and T

(untreated control). Treatment T contributed to reduce the highest number of leaf hopper, aphid, epilachna beetle, leaf roller, percent leaf infestation and plant infestation by leaf hopper, aphid, epilachna beetle, leaf roller were 5.72 leaf hopper/plant, 2.79 aphid/plant, 1.14 epilachna beetle/plant, 2.12 leaf roller/plant, 13.45%leaf/ five plant, 12.03 %leaf/ five plants, 9.20% leaf/five plants, 5.66% leaf/five plants, 13.89% plant/plot, 13.89% plant/plot, 8.33% plant/plot, 8.33% plant/plot respectively. Similarly, T 7 also contribute to reduce the number of leaf hopper (6.91), aphid (3.89), epilachna beetle (2.03), leaf roller (3.03), percent infestation of leaf and plant respectively by them. According to eco-friendly management T 1 showed the highly incidence of beneficial arthropods like lady bird beetle (5.21 lady bird beetle/plant), field spider (3.53 field spider/plant), ants (4.05 ants/plant) etc. in the brinjal field throughout the growing season. T 7 1 showed best performance for high single fruit weight (39.00 gm) and yield (25.57 ton/ha) of brinjal. T also showed more or less similar performance in case of single fruit weight (34.66 gm) and yield (24.59 ton/ha). Considering the environmental hazard and effect of incidence of beneficial arthropods T 1 was the best treatment against sucking and other foliage insect pests of brinjal.

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