Du Juan, Li Guangwei, Xu Xiangli, Wu Junxiang
Key Laboratory of Plant Protection Resources and Pest Management (Northwest A&F University), Ministry of Education, Yangling, 712100 Shaanxi, People's Republic of China.Key Laboratory of Applied Entomology, Northwest A&F University, Yangling, Shaanxi, People's Republic of China.
Environ Entomol. 2015 Dec;44(6):1522-30. doi: 10.1093/ee/nvv124. Epub 2015 Aug 13.
The oriental fruit moth Grapholita molesta (Busck) is a globally important insect pest. In some parts of its geographic range, the oriental fruit moth shifts its attack from peach orchards to pear orchards late in the growing season. The phenological effects of host plants on the performance of the moth were evaluated by examining the development and fecundity of the moth reared on peach (Prunus persica variety "Shahong") and pear (Pyrus bretshneideri variety "Dangshan Su") collected at various times of the growing season under laboratory conditions. Results showed that the moth developed faster on shoots and fruits of peach than on those of pear. The preimaginal survival rate was the highest on peach shoots, and the moth could not survive on pear fruit collected on May 10. For both peach and pear, the boring rates of neonatal larvae were significantly higher on shoots than on fruits, and the pupal mass of females was significantly higher on fruits than on shoots. The boring rate increased with pear fruits growing during later days. Fecundity was significantly less on pear shoots than on the other plant materials. The results of this study suggest a possible host adaptation process in oriental fruit moth.
桃小食心虫Grapholita molesta (Busck) 是一种全球重要的害虫。在其地理分布范围的某些地区，桃小食心虫在生长季节后期会将攻击目标从桃园转移到梨园。通过在实验室条件下，研究在生长季节不同时间采集的桃（Prunus persica品种“沙红”）和梨（Pyrus bretshneideri品种“砀山酥”）上饲养的桃小食心虫的发育和繁殖力，评估了寄主植物的物候对该蛾类表现的影响。结果表明，桃小食心虫在桃的嫩梢和果实上比在梨上发育得更快。预蛹存活率在桃嫩梢上最高，且该蛾类无法在5月10日采集的梨果实上存活。对于桃和梨，初孵幼虫在嫩梢上的蛀入率均显著高于果实，而雌虫在果实上的蛹重显著高于嫩梢。随着梨果后期生长，蛀入率增加。梨嫩梢上的繁殖力显著低于其他植物材料。本研究结果表明桃小食心虫可能存在寄主适应过程。
