Indonesian

Abstract

Bayu MSYI. 2015. Attack level of various pod pests on soybean germplasm. Pros Sem Nas Masy Biodiv Indon 1: 878-883. Increasing productivity of soybean in Indonesia is constrained by attacks of pests. Soybean pod pests are the major pest causing the highest yield loss. There are three groups of soybean pod pests, i.e. pod borer (Etiella zinckenella), pod sucking bugs (Riptortus linearis, Nezara viridula, Piezodorus hybneri) and pod feeder (Helicoverpa armigera). The objective of this study was to determine the attack level of pod pests on soybean germplasm. The research was conducted in May-September 2010 in the Laboratory of Entomology at Kendalpayak Research Station, Balitkabi, Malang. The experimental design was augmented design, 68 treatments with six replicates. The attack of pod sucking bugs, pod borer, and pod feeder were done with observed symptoms on the pods and seeds. The results showed that pod sucking bugs, pod borer and pod feeder attacked all of the soybean germplasm that conserved with the percentage of pods damaged ranged from 9.63 to 80.93% and the percentage of seeds damaged ranged from 4.50-76.11%. The pod damage caused by pod sucking bugs, pod borer, and pod feeder were 1.34-73.13%, 0.19-74.20% and 0-5.11% respectively and the seed damage were 0.54- 70.78%, 0.08-49.78% and 0-3.01%. The low percentage of the pod and seed damage due to pod sucking bugs, pod borer, and pod feeder were in Gepak Ijo, MLGG 377 and Gepak Kuning. The symptom of pod sucking bugs in pods and seeds were a small hole with lightly browned. The symptom of pod borer was dirt caused by larvae. However, the symptom of pod feeder was a huge hole in the pod.