Growth Promotion and Development and Dynamics of <i>Phytopthora capsicum</i> Control under Fennel and Pepper Intercropping

Ying LI; Yiyi HE; Junwei SUN; Zhiping ZHANG; Xinyue MEI; Haining WANG; Yixiang LIU; Zuosen LI

doi:10.12101/j.issn.1004-390X(n).202203039

JOURNAL OF YUNNAN AGRICULTURAL UNIVERSITY（Natural Science） > 2022 > 37(6): 932-939. > DOI: 10.12101/j.issn.1004-390X(n).202203039

Ying LI, Yiyi HE, Junwei SUN, et al. Growth Promotion and Development and Dynamics of Phytopthora capsicum Control under Fennel and Pepper Intercropping[J]. JOURNAL OF YUNNAN AGRICULTURAL UNIVERSITY（Natural Science）, 2022, 37(6): 932-939. DOI: 10.12101/j.issn.1004-390X(n).202203039

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Growth Promotion and Development and Dynamics of Phytopthora capsicum Control under Fennel and Pepper Intercropping

1.
Key Laboratory of Agrobiodiversity and Pest Management, Ministry of Education, Yunnan Agricultural University, State Key Laboratory for Conservation and Utilization Bio-Resources in Yunnan, Kunming 650201, China
2.
College of Tobacco Science, Yunnan Agricultural University, Kunming 650201, China

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Received Date: March 15, 2022
Revised Date: September 25, 2022
Accepted Date: September 26, 2022
Available Online: September 29, 2022
Published Date: November 29, 2022

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Abstract

Abstract

PurposeTo study the effects of pepper intercropping with fennel on Phytophthora capsici.
MethodsPepper monoculture and pepper intercropping with fennel were set in Xundian County, Kunming City, Yunnan Province, comparing the differences of biomass, root morphology and enzyme activity between the two cropping patterns. The incidence and disease index of the two cropping patterns were evaluated by Logistic model.
Results Pepper intercropping with fennel was beneficial to the growth of fennel and pepper root. The root length and root surface area of pepper in intercropping pattern were extremely significantly higher than monoculture pattern (P<0.01), and there were significant differences in root diameter and root volume between two patterns (P<0.05). In intercropping pattern, the asymptotic maximum incidence and disease index and the maximum growth rate of pepper were significantly lower than pepper monoculture pattern (P<0.05), but without significant difference in initial growth rate (P>0.05). Intercropping pattern significantly delayed the time of reaching the maximum instantaneous rate. The activities of superoxide dismutase and catalase in pepper roots under intercropping pattern were significantly higher than monoculture pattern (P<0.05), but without significant difference in peroxidase (P>0.05).
ConclusionPepper intercropping with fennel can reduce the incidence and disease index of P. capsici, delaying the outbreak time of P. capsici, promoting the growth of root system and enzyme activity of root and increasing the resistance of pepper.
- intercropping,
- Phytophthora capsici,
- disease index,
- incidence of disease,
- instantaneous growth rate

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