Study on the disease and pest risk of white cucumber germplasm resources in Hangzhou and its control technique

doi:10.16178/j.issn.0528-9017.20240560

Abstract

Abstract:

In this study, we investigated the occurrence of pests and diseases of 3 local varieties of white cucumber germplasm resources collected from Hangzhou area, analyzed their susceptibility to diseases and pests, explored the disease and pest risk and developed the control technique for them. The results showed that under the condition of natural occurrence, different germplasms of white cucumbers have significant differences in the susceptibility to diseases and pests. The most susceptible germplasm to seedling disease was 2022CA1-1. Downy mildew was the most susceptible disease in the field period, and the most susceptible germplasm was 2022CA1-2 whose peak disease index of spring and autumn cucumber were 77.89 and 80.04, respectively. The susceptibility of 2022CA1-1 and 2022CA1-2 to the bacterial angular leaf spot were moderate which showed higher than 2022LH1-1. The most susceptible germplasm to powdery mildew was 2022CA1-2 which led to heavy occurrence in the middle and late growth stage. Aphis gossypii, Bemisia tabaci, Thrips palmi were the most susceptible pests, and Diaphania indica was moderate. Liriomyza sativae and Tetranychus cinnbarinus could be often investigated but less amount of occurrence. The incidence extent of all major pests had no obvious difference between different germplasms of white cucumber. On the basis of susceptibility analysis results to pests and diseases in various germplasm, the green techniques against different stages which included preplanting, seedling and field period were formulated. The findings of this study could be useful for breeding and utilization of resistance germplasm in white cucumber.

Key words: white cucumber, germplasm resource, diseases and insect pests, susceptibility, control technique

CLC Number:

S431.192

WU Yanjun, HONG Wenying, ZHU Xuyan, HUA Yonggang, WANG Qun, NI Jinzhuang, HU Qinmian, CHEN Rui. Study on the disease and pest risk of white cucumber germplasm resources in Hangzhou and its control technique[J]. Journal of Zhejiang Agricultural Sciences, 2025, 66(3): 681-686.

Figures/Tables 6

Fig.1 The occurrence of downy mildew in different germplasm resources of white cucumber

Fig.2 The occurrence of bacterial angular leaf spot in different germplasm resources of white cucumber

Fig.3 The occurrence of powdery mildew in different germplasm resources of white cucumber

Fig.4 The occurrence of Aphis gossypii in different germplasm resources of white cucumber

Fig.5 The occurrence of Bemisia tabaci in different germplasm resources of white cucumber

Fig.6 The occurrence of Thrips palmi in different germplasm resources of white cucumber

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