International Journal of Plant Protection

A. A. Shaikh ¹, J. B. Bhut ¹, M. V. Variya ¹

Affiliations
1 Main Vegetable Research Station, Anand Agricultural University, Anand (guijarat), IN

Abstract

An experiment was conducted to study the bio-efficacy of nine different insecticides (triazophos 0.08 %, imidacloprid 0.002 %, profenophos 0.05 %, diafenthiuron 0.05 %, clothianidin 0.025 %, cartap hydrochloride 0.05 %, thiamethoxam 0.025 %, thiacloprid 0.012 % and spiromesifen 0.024 %) again sucking pests viz., jassid and whitefly in brinjal (GBH 1) at Main Vegetable Research Station, Anand Agricultural University, Anand during Rabi season of 2011-12. Among different insecticides evaluated, thiamethoxam, diafenthiuron and thiacloprid emerged as most effective; profenophos, clothianidin and imidacloprid were mediocre; while cartap hydrochloride, spiromesifen and triazophos were found least effective against jassid. So far whitefly is concerned, spiromesifen, diafenthiuron and triazophos emerged as most effective; imidacloprid, profenophos and cartap hydrochloride as mediocre, while clothianidin, thiamethoxam and thiacloprid emerged as least effective. Diafenthiuron exhibited significantly higher brinjal fruit yield (350.57 q/ha), whereas triazophos and cartap hydrochloride hosted significantly lower fruit yield. The minimum and maximum per cent avoidable losses were recorded in diafenthiuron (0.00) and control (55.25), respectively. The highest Net ICBR (71.83) was obtained from the plots treated with profenophos followed by thiacloprid (56.10), cartap hydrochloride (43.93), imidacloprid (39.10) and diafenthiuron (27.69).

Keywords

Effectiveness, Insecticides, Sucking Pests, Avoidable Losses

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S. G Kanade ¹, A. A. Shaikh ¹, J. D. Jadhav ¹

Affiliations
1 Zonal Agricultural Research Station, SOLAPUR (M.S.), IN

Abstract

An experiment was laid out in Randomized Block Design with five sowing dates viz., S₁ -22^nd June, S₂ -29^th June, S₃ -6^th July, S₄ -13^th July and S₅ -20^th July and four replications. The observations on initiation of rust diseases and per cent disease intensity were recorded periodically at an interval of one week after the occurrence of these diseases. In rust disease maximum temperature (0.59), morning relative humidity (0.33), evaporation (0.33) and bright sunshine hours (0.55) showed positive correlation with disease intensity. Whereas, minimum temperature (-0.44), evening relative humidity (-0.58) and wind speed (-0.63), showed negatively significant correlation with disease intensity in Kharif season. Other climatic factors i.e. rainfall showed no significant correlation with disease intensity. The morning relative humidity and bright sunshine hours were correlated for rust disease incidence. The result from all the relevant observations indicated that the morning relative humidity (2.87) and bright sunshine hours (5.65) during the crop growing period was found to be highly significant weather conditions for rust disease development among the all other weather parameters. The multiple regression equation developed from the data in this regard is as : Y= -257.591 +2.879RH-I(W-1) +5.651BSS(W-1).

Keywords

Rust of Groundnut, Biometerological Effect, Climatic Factors.

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