Legume Genomics and Genetics 2025, Vol.16, No.6, 297-312 http://cropscipublisher.com/index.php/lgg 297 Feature Review Open Access Effects of Continuous Rainy Weather on Pea Pod Set Rate and Preventive Measures Xingde Wang, Tianxia Guo Institute of Life Sciences, Jiyang College, Zhejiang A&F University, Zhuji, 311800, Zhejiang, China Corresponding email: tianxia.guo@jicat.org Legume Genomics and Genetics, 2025 Vol.16, No.6 doi: 10.5376/lgg.2025.16.0030 Received: 30 Oct., 2025 Accepted: 15 Dec., 2025 Published: 28 Dec., 2025 Copyright © 2025 Wang and Guo, This is an open access article published under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Preferred citation for this article: Wang X.D., and Guo T.X., 2025, Effects of continuous rainy weather on pea pod set rate and preventive measures, Legume Genomics and Genetics, 16(6): 297-312 (doi: 10.5376/lgg.2025.16.0030) Abstract Pea is one of the important legume crops in my country, but its pod setting rate is easily affected by environmental conditions. In recent years, continuous rainy weather has occurred frequently in some planting areas, resulting in insufficient light, soil moisture and high incidence of diseases, which have led to the obstruction of pea flowering and pod setting and a decrease in yield. This study focuses on the physiological mechanism of pea pod setting, systematically analyzes the specific effects of continuous rainy weather on the pea pod setting rate, including photosynthetic restriction, root inhibition and pollination and fertilization barriers, compares the response differences of different pea varieties to continuous rain, explores the characteristics of highly sensitive and shade-tolerant varieties and their pod setting rate under rainy conditions, and proposes targeted prevention and control strategies and field management measures on this basis. Through case analysis in Yunnan, Gansu, Guizhou and other places, local experience is summarized and the effectiveness of the above measures is verified. This study provides a scientific basis for coping with the decline in pea pod setting rate under abnormal climatic conditions, and hopes to enhance the risk resistance of pea production. Keywords Pea; Pod setting rate; Pontinuous rain; Pariety resistance; Prevention and control measures 1 Introduction Pea (Pisum sativumL.) is a leguminous crop with a long history of cultivation in my country, and it occupies an important position in the edible bean industry. According to statistics, my country's edible bean crops are mainly broad beans, peas and mung beans, and the total planting area of the three accounts for more than 90% of the total edible bean area. In recent years, with the promotion of new varieties and new technologies, the yield and total output of edible beans such as peas have increased significantly. In particular, in the past decade, broad beans and peas have gradually shifted from harvesting dry grains to harvesting fresh pods for marketing, which has promoted the development of my country's bean industry (Chen et al., 2021). Peas are not only eaten as fresh vegetables, but also as food and feed. They are an important source of protein for adjusting grain and oil supply and developing animal husbandry. my country's main pea producing areas are distributed in the southwest and northwest, such as Yunnan and Gansu provinces, where the planting area is large. However, the yield of peas is subject to factors such as the number of pods (i.e., pod setting rate) and the number of grains per pod. Among them, improving the pod setting rate is the key to achieving increased production (Yang et al., 2022). In recent years, in actual production, the low pod setting rate of peas in some areas has become a problem that restricts the increase of yield, which has attracted the attention of researchers and growers. Continuous rain refers to a rainy and low-sun weather process that lasts for many days, generally accompanied by a significant lack of sunshine, long-term high air humidity, and sometimes low temperature. In the middle and lower reaches of the Yangtze River in my country, the "plum rain" in early summer every year is a typical continuous rain phenomenon. Its cause is that the warm and humid air currents in the south and the cold air in the north interact for a long time, forming a stable frontal precipitation belt (Wu et al., 2021). In addition to the plum rain period, continuous rainy weather processes often occur in southwest my country and South China in early spring and autumn. Studies have shown that abnormal atmospheric circulation is an important cause of continuous rain. When the large-scale circulation adjusts slowly and the cold and warm air currents maintain a confrontation
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