Effect of micronutrient zinc and boron on the incidence of soil pest on potato

Biplab Kahar., Amitava Konar and Palash Mondal

Bio-efficacy of various treatment schedules of micronutrient Zinc (Zn) and Boron (B), viz T1 (V2Zn0B0), T2 (V2Zn1B1), T3 (V2Zn1B0), T4 (V2Zn0B1), T5 (V1Zn0B0), T6 (V1Zn1B1), T7 (V1Zn1B0) and T8 (V1Zn0B1) were evaluated against soil pests, viz. cutworm, Agrotis ipsilon (Hufner), mole cricket, Gryllotalpa africana, P.de. Beau. and potato tuber moth (PTM), Phthorimaea operculella (Zeller) in two potato variety, Kufi Chandramukhi (K.CM) and Kufri Jyoti (K.JT) during rabi season of two consecutive years in 2015-2016 and 2016-2017 from November to February. The percentage of healthy tuber yield of K.JT and K.CM was found highest in T2 (78.93 – 80.75%) and T6 (81.43 – 82.47%) and found lowest in T1 (66.45 – 69.49%) and T5 (63.24 – 68.58%), respectively. Similarly percentage of tuber damage of K.JT and K.CM was noted highest in T1 (30.51 – 33.55 %) and T5 (31.42 – 36.76%) and it was lowest in T2 (19.25–21.07%) and T6 (17.53 – 18.57%) respectively. Among the different treatment schedules combined application of Zn and B in T2 and T6 revealed effective result in increasing marketable yield of potato tubers and reduction of soil pest incidence over control T1 and T5 and also over other treatments.

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