The effects of different annual crop rotation patterns on tobacco root-knot nematodes

doi:10.14088/j.cnki.issn0439-8114.2025.01.013

Abstract

Abstract: In order to explore the effects of different annual crop rotation patterns on tobacco root-knot nematodes, a field positioning experiment was carried out in Zhanyi District, Qujing City, Yunnan Province. With flue-cured tobacco-winter fallow-flue-cured tobacco as the control, five rotation treatments of flue-cured tobacco-green manure-sorghum, flue-cured tobacco-green manure-marigold, flue-cured tobacco-oats-marigold, flue-cured tobacco-barley-marigold, flue-cured tobacco-quinoa-marigold were set up to study the effects of different rotation treatments on the number of tobacco root-knot nematodes, the incidence rate and disease index of flue-cured tobacco at different stages. The results showed that the number of root-knot nematodes in the soil after harvesting barley, oats, and quinoa was significantly lower than that before transplanting in the tobacco winter fallow （CK） treatment, indicating that planting barley, oats, and quinoa in winter could inhibit the growth of root-knot nematodes compared to winter fallow. After harvesting marigold, compared to the peak flowering period of marigold flowers, the number of soil root-knot nematodes decreased by 14.9%, 20.0%, and 41.3% in the treatments of tobacco-oat-marigold, tobacco-barley-marigold, and tobacco-quinoa-marigold, respectively. It indicated that annual rotation of tobacco with oats, barley, quinoa, and marigold could reduce the number of soil root-knot nematodes to some extent.

Key words: flue-cured tobacco, annual crop rotation patterns, root-knot nematodes

CLC Number:

LI Jun-ying, ZHOU Min, DENG Xiao-peng, ZOU Bing-li, ZHANG Hong, ZHANG Liu-chen, YANG Jing-hua, ZHOU Shao-song. The effects of different annual crop rotation patterns on tobacco root-knot nematodes[J]. HUBEI AGRICULTURAL SCIENCES, 2025, 64(1): 70-74.

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