外源茉莉酸和水杨酸甲酯对西花蓟马生长发育和种群动态的影响

Effects of exogenous jasmonic acid and methyl salicylate on developmental duration and population dynamics of Frankliniella occidentalis

为明确不同外源因子对菜豆的诱导抗性及对西花蓟马的影响,研究了茉莉酸、水杨酸甲酯、西花蓟马为害、机械损伤诱导处理的菜豆对西花蓟马生长发育和种群动态的影响。结果表明外源茉莉酸、水杨酸甲酯、西花蓟马为害处理菜豆植株显著延长了西花蓟马未成熟期的发育时间,较健康植株分别延长4.72、2.87和4.95d,也造成西花蓟马的存活率不同程度的下降。西花蓟马在机械损伤处理和健康植株发育时间差异不显著。不同处理均使西花蓟马种群数量明显下降,并且茉莉酸的抑制作用最明显。因此,外源茉莉酸和水杨酸甲酯诱导的菜豆可对西花蓟马生长发育和种群动态产生不同程度的影响,且茉莉酸的诱导抗性要优于水杨酸甲酯。本结果对探索西花蓟马的防治新策略有一定的参考价值。

In order to explore the induced resistance of bean plants by different exogenous factors and its effects on Frankliniella occidentalis,the influences of bean plants treated with jasmonic acid（JA）,methyl salicylate（Me-SA）,thrips-infested and mechanical damage on the developmental duration and population dynamics of F. occi-dentalis were studied. The results showed that the developmental duration of immature stage of F. occidentalis was significantly prolonged when treated with exogenous JA,MeSA and thrip-infestation,with 4.72,2.87 and 4.95 d longer than that of the healthy plant,respectively,and the survival rate of F. occidentalis decreased to different extents. The difference in the development duration of F. occidentalis between healthy and mechanical-ly damaged plants was insignificant. The population dynamics of F. occidentalis significantly decreased under dif-ferent treatments,and JA had the most significant inhibitory effect. Therefore,the bean plants induced by exoge-nous JA and MeSA had effects on the developmental duration and population dynamics of F. occidentalis,and the effect of induced resistance by JA was bigger than that of MeSA.These results could provide guide for exploring new control strategies for F. occidentalis.