PJB-2019-503
RELATIONSHIP BETWEEN FUSARIUM AND MELOIDOGYNE INCOGNITA AND THEIR MANAGEMENT THROUGH BIOCHAR PRODUCT IN TOMATO.
Muhammad Ghani
Abstract
Tomato is cultivated in almost all the regions of the world because of its short duration and high yield. But it has been subject to numerous pathogen and pests including Fusarium wilt and Meloidogyne incognita due to its wide range cultivation. When the root-knot nematode interacts with the Fusarium wilt the incidence and severity of the plant disease increases. The combined potential of both the pathogens causes much more damage than both of the pathogens can develop separately. The present investigation included nature of interaction between pathogens involved when inoculated singly or sequentially and there management through different concentration of biochar products. In interaction studies, inoculation of nematode 7 days prior to fungus inoculation caused greater per cent wilt incidence with highest number of galls per root system, while there was no significant difference of wilting percentage and number of galls inoculation of both the pathogens simultaneously as they caused almost similar damage to the crop. These results suggest that the nematode predisposes the tomato to infection by wilt inducing fungus Fusarium oxysporum f.sp. lycopersici and aggravate the disease by modifying the physiological environment of the root system of tomato, as reduction in wilt percentage and number of galls observed in situations where nematode infects the host later to fungus. While the results of soil amendments shows that it that biochar 6% significantly decreased wilt incidence .But with respect to reduction in number of galls it has no significant effect.
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