HUBEI AGRICULTURAL SCIENCES ›› 2026, Vol. 65 ›› Issue (6): 87-92.doi: 10.14088/j.cnki.issn0439-8114.2026.06.014

• Plant Protection • Previous Articles     Next Articles

Efficacy of 5% metaldehyde granules on Pomacea canaliculata control and seedling protection in rice-crayfish fields

WANG Miao-miao1,2, YANG Jian3,4, SUN Xiao3, TIAN Mao-tao1,2, JING Da-qian5, YANG Cheng6, WANG Ben-fu1,2, CHENG Jian-ping1,2, ZHANG Zhi-sheng1,2   

  1. 1. College of Agriculture, Yangtze University, Jingzhou 434023,Hubei,China;
    2. Hubei Key Laboratory of Food Crop Germplasm and Genetic Improvement / Institute of Food Crops, Hubei Academy of Agricultural Sciences, Wuhan 430064,China;
    3. Sino-Agri Leading Biosciences Co., Ltd., Beijing 100052,China;
    4. Sino-Agri Profenghe Hubei Technology Co., Ltd., Wuhan 430070,China;
    5. College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070,China;
    6. Xishui County Bureau of Agriculture and Rural Affairs, Xishui 438200,Hubei,China
  • Received:2026-02-06 Online:2026-06-25 Published:2026-06-26

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Abstract: To evaluate the control efficacy of 5% metaldehyde granules against the golden apple snail (Pomacea canaliculata) and their protective effect on rice seedlings under the rice-crayfish co-culture system, a field experiment was conducted in rice-crayfish fields in Qianjiang City, Hubei Province. The treatments were set as follows：7.50 kg/hm2 of 6% metaldehyde granules (T1), 5% metaldehyde granules at doses of 4.50, 6.75, and 9.00 kg/hm2 (T2, T3, T4), and a non-treated blank control (CK). Snail mortality, the number of egg masses, and rice seedling loss rate were investigated at 1, 2, 7, and 14 days after application. The control efficacy and seedling protection rate were calculated accordingly. By 14 days after application, snail mortality in all metaldehyde-treated plots exceeded 80%. Compared with the T1 treatment, the mortality rates in T2, T3, and T4 treatments were significantly increased by 71.11%, 86.67%, and 95.56%, respectively, at 1 day after application. All treatments with 5% metaldehyde granules were significantly more effective than the 6% metaldehyde granule treatment in suppressing egg mass numbers and reducing rice seedling loss. Notably, the control efficacy of the T3 treatment reached 94.78% and 99.12% at 7 and 14 days after application, respectively. Considering both control efficacy and environmental impact, an application rate of 5% metaldehyde granules ranging from 4.50 to 6.75 kg/hm2 was recommended for the management of the golden apple snail.

Key words: rice-crayfish field, golden apple snail(Pomacea canaliculata), metaldehyde granules, control efficacy

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