Year: 2022 | Month: March | Volume 15 | Issue 1

Evaluation of Plant based Aqueous Extracts against the Major Sucking Pests of Brinjal (Solanum melongena L.)

Gokulapriya G. Chandrasekaran M. Soundararajan R.P. Indhumathi K.
DOI:10.30954/0974-1712.01.2022.16

Abstract:

Brinjal holds a distinct place in the domain of vegetables. The production and productivity is extremely lowered by the interference of borers and sap feeders. An experiment was conducted to evaluate the efficacy of different botanicals on the sucking pests of brinjal viz., leaf hoppers (Amrasca biguttula biguttula Ishida), whitefly (Bemisia tabaci Gennadius), mealy bug (Phenacoccus solenopsis Tinsley) and red spider mite (Tetranychus urticae Koch) during March - July, 2021. The results on the evaluation of aqueous extracts revealed that the commercial formulation Azadirachtin 0.003 EC was identified as an effective treatment (46.70% -75.84%) against the infestation of sucking pests. Among the aqueous plant extracts, Neem Seed Kernel Extract (NSKE) 5% showed 63.48% reduction of leaf hoppers, 64.48 % of whitefly, 43.72 % of mealy bug, 42.68 % of red spider mite. Next effective results were obtained from Ginger, Garlic and Green chilli (3G) extract with 61.75 % population decline of leaf hopper, 57.86 % of whitefly, 41.35 % of mealy bug and 36.78 % of red spider mite. Citrullus extract 5% was found to be a moderately effective treatment with 49.20% mortality of leaf hoppers, 46.87% of whitefly, 39.20 % of mealy bug and 26.27% of red spider mite. The standard insecticide check Thiamethoxam 25 WG was found to be superior in keeping the sucking pests population under check (62.15 % - 81.16 %) than the other aqueous extracts. The hierarchy of effectiveness was in the order of Thiamethoxam 25 WG >Azadirachtin 0.003 EC > Neem Seed Kernel Extract 5% > Ginger, Garlic and Green chilli3G extract 5% > Citrullus extract 5% > 3G extract 3% > Panchakavya 5%.



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Highlights

  • Brinjal holds a significant position in vegetable market since it is widespread in cultivation and rich in nutrition.
  • Approximately about 67 per cent yield loss is occurred due to the infestations of sucking pests in brinjal
  • Application of aqueous plant extracts can minimise the yield loss and improves the crop growth.


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