Assessment of Disease Severity of Mulberry (Morus alba L.) var.S1 Concerning Soil Physiochemical Properties Under Three Districts of West Bengal India
Abstract
A study was conducted on the effect of soil health and its consequences on disease severity in popular S1 mulberry variety (Morus alba L.) under three districts Birbhum, Malda, and Murshidabad, West Bengal where sericulture is being practiced since last few decades. The physiochemical properties, like soil pH, EC, OC, and NPK content were measured under the said districts. The soil pH of mulberry fields in Birbhum (72%) were found <6.5, in Malda (84%) within 6.5-7.5, and in Murshidabad (68%) within 6.5-7.5. The soil electrical conductivity (EC) was found to be 0.5 under 88% area in Malda and Murshidabad and 84% area in Birbhum districts, respectively. The soil organic carbon (OC) was found 5 g/kg in Murshidabad and Birbhum districts under 84% and 82% area, respectively. The soil nitrogen was recorded 44 - 445 kg/Ha in Murshidabad under 60% area, whereas in Malda, it varied between 32- 493 kg/Ha under 64% area. The soil phosphorus was recorded 2-204 kg/Ha in Murshidabad under 16% area, whereas in Malda, it varied between 11-81 kg/Ha under 24% area. The soil potassium was recorded 52-985 kg/Ha in Murshidabad under 14% area, whereas in Malda, it varied between 105-832 kg/Ha under 13% area. The soil NPK of Birbhum district was found to be very poor. The highest PDI was recorded in Birbhum of bacterial leaf spot (avg. 11.82%), in Malda, Myrothecium leaf spot (avg. 5.56%) and in Murshidabad, bacterial leaf spot (avg. 8.94%) among all the five diseases studied. Comparatively mulberry leaf rust disease shown less sensitivity with all soil edaphic factors.
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