<p><strong>Spodoptera litura is a pest in vegetable plants that attacks the leaves and stems. Damage arising from the attack of S. litura can decrease the productivity of plants. Synthetic pesticides are often used in controlling the population of S. litura, but synthetic pesticides have a high negative impact. Potential entomopathogenic nematode Heterorhabditis spp. believed to be effective for controlling pest populations. This study aims to find out the pathogenic value of entomopathogenic nematode Heterorhabditis spp. to the larvae of S. litura. Based on the results obtained Heterorhabditis spp. has a positive influence in causing mortality in the larvae of S. litura. Heterorhabditis spp. mortality of up to 42%. Symptoms indicated by larvae of S. litura affected by Heterorhabditis spp. among them the behavior becomes passive, the body becomes flaccid, the cuticle turns red and the tissues inside the body are destroyed. Obtained pathogenicity value Lc 50 Heterorhabditis spp. 7,690 IJ/ml, as for the factors affecting Heterorhabditis spp. such as humidity, temperature, pH, and light intensity.</strong></p><p><em><strong>Keywords – </strong>Entomopathogenic Nematodes, Pathogenicity, Spodoptera litura</em></p>
Lepidiota stigma (F) (Coleoptera; Scarabaeidae) is the key pest in sugarcane plantation caused devastated damaged on roots. The objectives of this research are to determine virulence of Steinernema sp, an entomopathogenic nematodes to larvae of L. stigma in laboratory. The Experiment was conducted in the laboratory, Agrotechnolofy Department University of Jember. Filter paper and sand method was used to determined the effective concentration of entomopathogenic nematodes againts larva of white grub.The result showed that all entomopathogenic nematodes able to kill larvae of white grub L. stigma at all level concentration and soil depth. The result also convinced that Steinernema sp. origin from Kediri was more virulence compared with the other isolates.
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