Effectiveness of indigenous Heterorhabditis sp. against lepidopterous crucifer pest complex in Indonesia
1999
Suyanto, Agus | Hansen, Gunner K. (Asian Institute of Technology, Pathum Thani (Thailand). School of Environment. Agricultural System Field Study)
Effectiveness of indigenous entomopathogenic nematode Heterorhabditis sp., from the crucifer production area of Banjarnegara district, Central Java province, Indonesia, against a lepidopterous pest complex was investigated in the laboratory. The nematodes were developed in a monoxenic culture, which contained beef homogenates and bacteria Xenorhabdus sp. The results showed that the efficacy of Heterorhabditis sp. on the diamondback moth Plutella xylostella (L.) (Lepidoptera: Yponomeutidae) was less than on the cabbagehead caterpillar Crocidolomia pavonana (F.) (Lepidoptera: Pyralidae) and the cluster caterpillar Spodoptera litura (F.) (Lepidoptera: Noctuidae). The larval mortality was positively correlated with the increase of the nematode concentrations. In contrast, the percentages of pupa and adult emergence were directly negative correlated with the increases of the concentrations. Our results indicated that the effective concentration on the cabbagehead caterpillar (C.pavonana) and the cluster caterpillar (S. litura) was 300 nematodes/ml of water, while it was 450 nematodes/ml of water to be effective for the diamondback moth (P. xylostella).
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