Diversity of hymenoptera parasitoid wasp in oil palm with the presence and absence of non crop vegetation

Abstract

The diversity of hymenopteran parasitoid wasps is influenced by the presence of the host, the number and type of flowering vegetation as a food source for adult parasitoids. This study aims to determine the effect of reducing non-crop vegetation by cattle grazing disturbances on the impact of beneficial ecosystem services, especially parasitoids wasp in oil palm plantations. This disturbance phenomenon is important to study, so that it can see the response of each parasitoid wasp due to reduced vegetation and become the basis for strategies for habitat enrichment in oil palm plantations. Sampling was carried out in six blocks, including six oil palm blocks consisting of three blocks with non-plant vegetation disturbance and three blocks without disturbance. Insect collection uses yellow pot traps, malaise traps, and sweeping nets. In total, 4273 individuals belonging to 185 morphospecies, 24 families, and 9 superfamilies were collected from all sampling methods. The diversity and abundance of Hymenopteran parasitoids wasp are strongly influenced by the presence or absence of non-plant vegetation, especially flowering herbs. The reduced non-crop vegetation was followed by a decrease in the population of several Hymenopteran parasitoid wasps both in terms of abundance and richness.