摘要
【目的】德夸菌素(decoyinine,DCY)是一种新型植物生长调节剂。本研究旨在探究DCY浸种处理对商用水稻品种徐稻10与湘两优900抗褐飞虱Nilaparvata lugens的影响。【方法】利用年龄-龄期两性生命表测定和比较了褐飞虱初孵若虫取食不同浓度[0(清水对照),25,50和100 mg/L]DCY浸种处理的徐稻10和湘两优900植株后的生长发育、成虫繁殖力及种群生命表参数,并模拟其60 d内的种群增长情况。还调查了100 mg/L DCY浸种处理对褐飞虱雌成虫蜜露分泌量、体重及取食和产卵偏好的影响。【结果】与取食对照稻株相比,褐飞虱初孵若虫取食不同浓度DCY浸种处理的徐稻10植株后,若虫历期显著延长,成虫繁殖力(单雌产卵量)显著下降,种群参数净增殖率R_(0)、内禀增长率r_(m)和周限增长率λ显著降低,平均世代周期T和种群倍增时间DT显著升高;褐飞虱初孵若虫取食不同浓度DCY浸种处理的湘两优900植株后,若虫历期显著缩短,单雌产卵量显著下降,仅平均世代周期T显著升高,其他种群参数无显著差异。在两种水稻上,60 d种群模拟的结果表明3个处理组的种群大小都小于对照组的。取食100 mg/L DCY浸种处理的徐稻10与湘两优900稻株的褐飞虱雌成虫的蜜露分泌量和体重都显著低于取食对照组稻株的。取食和产卵选择试验表明,褐飞虱雌成虫更倾向于在对照稻株上取食和产卵。【结论】DCY浸种处理徐稻10与湘两优900后会提高其对褐飞虱的抗性。
【Aim】Decoyinine(DCY)is a new plant growth regulator.The aim of this study is to explore the effects of seed soaking with DCY on the resistance of commercial rice varieties Xudao 10 and Xiangliangyou 900 to the brown planthopper,Nilaparvata lugens.【Methods】After the newly hatched nymphs fed on Xudao 10 and Xiangliangyou 900 rice plants pretreated with different concentrations[0(clean water as the control),25,50 and 100 mg/L]of DCY by seed soaking,the growth and development,adult fecundity and population life table parameters of N.lugens were determined and compared by age-stage,two-sex life table,and the population growth was simulated within 60 d.The effects of seed soaking with 100 mg/L DCY on the honeydew excretion,body weight,and feeding and oviposition preference of the female adults of N.lugens were also investigated.【Results】When N.lugens fed on rice variety Xudao 10 pretreated with different concentrations of DCY by seed soaking,the nymphal duration was significantly prolonged,the fecundity(number of eggs laid per female)was significantly decreased,the population parameters including net reproductive rate R_(0),intrinsic rate of increase r_(m)and finite rate of increaseλwere significantly decreased,and the mean generation time T and doubling time DT were significantly increased,as compared with those in the control.When N.lugens fed on Xiangliangyou 900 rice plants pretreated with different concentrations of DCY by seed soaking,the nymphal duration was significantly shortened,the number of eggs laid per female was significantly decreased,and only the mean generation time T was significantly increased,while the other population parameters showed no significant change,as compared with those in the control.The results of 60-d population simulation showed that the population size of the three treatment groups was smaller than that of the control group.The honeydew excretion and body weight of female adults of N.lugens after feeding on Xudao 10 and Xiangliangyou 900 rice plants pretreated with 100 mg/L DCY by seed soaking were significantly lower than those of female adults feeding on rice plants of the control group.The feeding and oviposition preference tests indicated that the female adults of N.lugens preferred to feed and oviposit on the control rice plants.【Conclusion】The resistance of commercial rice varieties Xudao 10 and Xiangliangyou 900 to N.lugens is enhanced by seed soaking treatment with DCY.
作者
桂威
佘圣尧
盛超琦
张圆圆
杨国庆
徐刚
GUI Wei;SHE Sheng-Yao;SHENG Chao-Qi;ZHANG Yuan-Yuan;YANG Guo-Qing;XU Gang(College of Plant Protection,Yangzhou University,Yangzhou 225009,China)
出处
《昆虫学报》
CAS
CSCD
北大核心
2024年第4期559-571,共13页
Acta Entomologica Sinica
基金
江苏省自然科学基金项目(BK20220570)
国家自然科学基金项目(32302344)。
关键词
褐飞虱
水稻
德夸菌素
年龄-龄期两性生命表
抗虫性
Nilaparvata lugens
rice
decoyinine
age-stage,two-sex life table
insect resistance
