Vol. 11, Issue 11 (2022)

Author(s):
V Amsavalli, BD Shinde, AL Narangalkar, SV Sawardekar and MS Joshi

Abstract:
The study on the management of black aphid was conducted at the Biological control unit, College of Agriculture, Dapoli, Dist. Ratnagiri, during the year 2022. The overall mean% mortality after two sprays revealed that the treatment T₆- imidacloprid 17.8 SL @ 0.053% was most effective treatment which recorded (90.07%) mortality of aphids. The next best treatment was T₇- acetamiprid 20 SP @ 0.1 percent with (83.17%) mortality. Whereas, T₅- neem oil 1% EC @ 1% recorded (82.00%) mortality, which was at par with T₄- pongamia oil 2% EC @ 2% (79.79%) mortality. Among the biopesticides tested, T₁- Lecanicillium lecanii 1x109 cfu/ml @ 0.4% recorded the highest (75.81%) mortality of aphids. It was followed by T3- Beauveria bassiana 1x108 cfu/ml @ 0.5% and T2- Metarhizium anisopliae 1x108 cfu/ml @ 0.5% which registered (71.74%) and (65.46%) mortality, respectively. While the lowest mortality (10.21%) was observed in untreated control. However, all the treatments were significantly superior over control.