Abstract:

In order to research the effect of different Jatropha curcas mixed mode on the prevention and control of pests and diseases, an investigation was made on the insect and disease community composition and structure in a Jatropha curcas L. plantation with Woodfordia fruticosa-Dodomaea viscose-Macadamia integrifolia-Coffea arabica-Arehromeris lehmahii, Dalhenqia dituaifolia-Mangifera indica-Bauhinia purpurea stars mixture and Jatropha curcas-Macadamia integrifolia belt mixture; Jatropha curcas-Dalhenqia dituaifolia belt mixture; Jatropha curcas-Zea mays belt mixture. The community character index and principal component analysis were used to study the characters and stability of the insect community. The results showed that a total of 47 insect species and 33 diseases were recorded. In mixture pattern of forestry, the abundance, diversity, and evenness index of insect community were higher while the dominance index was lower. Compared with those in monocultured Jatropha curcas L. pure forest, the diversity index of insect and diseases community decreased in the order of Jatropha curcas L. plantation with Woodfordia fruticosa-Dodomaea viscosa-Macadamia integrifolia-Arehromeris lehmahii, Dalhenqia dituaifolia-Mangifera indica-Bauhinia purpurea stars mixture>Jatropha curcas-Macadamia integrifolia belt mixture>Jatropha curcas-Dalhenqia dituaifolia belt mixture>Jatropha curcas-Zea mays belt mixture. Thus, the insect and disease community in Jatropha curcas mix plantation with Woodfordia fruticosa-Dodomaea viscosa-Macadamia integrifolia-Arehromeris lehmahii, Dalhenqia dituaifolia-Mangifera indica-Bauhinia purpurea stars mixture was relatively stable.