Relationship between dynamics of root-knot nematode and soil environment in Enshi tobacco growing areas

doi:10.14088/j.cnki.issn0439-8114.2020.12.018

Abstract

Abstract: The occurrence dynamics of root-knot nematode and its relationship with soil environment were investigated in Enshi tobacco growing areas. The results showed that the tobacco plants began to be damaged by root-knot nematodes 30 d after transplanting, and the incidence and disease index gradually increased until the harvest of tobacco leaves were over. At the same time, the relationship between root-knot nematode and soil water content, soil pH and soil temperature were studied. During the growth and development of tobacco plants, the incidence and disease index of root-knot nematode showed a significant negative correlation with soil water content, and the correlation coefficients were -0.728 and -0.667,respectively; There was a significant positive correlation with soil temperature, the correlation coefficients were 0.593 and 0.536,respectively; There was no significant correlation with soil pH. However, the number of eggs and second instar larvae had no correlation with soil water content, soil pH and soil temperature.

Key words: tobacco, root knot nematode, soil water content, soil temperature, soil pH

CLC Number:

S435.72

XIANG Bi-kun, SHI He-li, CHEN Hong-hua, ZUO Mei, PENG Wu-xing, YIN Zhong-chun, MENG Gui-xing, TAN Jun. Relationship between dynamics of root-knot nematode and soil environment in Enshi tobacco growing areas[J]. HUBEI AGRICULTURAL SCIENCES, 2020, 59(12): 82-84.

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