Biological characteristics of Leersia japonica (Makino) Honda and its implications for weed management

文献类型： 外文期刊

第一作者： Fang, Jiapeng

作者： Fang, Jiapeng;Yuan, Guohui;Gao, Yuan;Shen, Guohui;Tian, Zhihui

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关键词： Leersia japonica; biological characteristics; agronomic measures; weed management

期刊名称：PEST MANAGEMENT SCIENCE （ 影响因子：3.8； 五年影响因子：4.3 ）

ISSN： 1526-498X

年卷期： 2025 年 81 卷 1 期

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收录情况： SCI

摘要： BACKGROUND:Leersia japonica(Makino) Honda is a perennial weed and currently identified as a new dominant weed species inricefields in many countries, including China. Here, we studied the biological characteristics combined with nonchemical man-agement ofL. japonicato develop a proper control strategy of this weed.RESULTS: The results showed that 33/28 degrees C in a 12 h:12 h, light:dark photoperiod were the most suitable growth conditions forseedling regeneration. Salt (NaCl) inhibits the regeneration of seedlings totally at a concentration of 51.3 mM. Seedlings ofL.japonicacould regenerate in a wide range of pH environments (from 3.50 to 9.50), endowingL. japonicawith strong pH adapt-ability. Osmotic stress also inhibits the regeneration of seedlings totally at-0.13 MPa. A long dehydration time inhibits theregeneration of seedlings; no seedlings could be regenerated for 15 h. With low soil moisture content (33.3% and 50%), theregeneration rate and aboveground fresh weight (FW) were significantly lower than these with high soil moisture content(66.7% and 100%). Stem segments buried in the surface (0 cm) of soil could produce seedlings with the highest regenerationrate (37.5%) and seedling aboveground FW (0.64 g). As the soil depth increased, the regeneration rate and aboveground FWdecreased significantly and no seedlings could be regenerated beyond 6.9 cm.CONCLUSION: Based on these biological characteristics ofL. japonica, creating an environment that is not conducive to regen-eration combined with an appropriated tillage system could effectively reduce its occurrence.(c) 2024 Society of Chemical Industry.

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