Validoxylamine A showed a potent inhibitory activity against insect trehalase in a competitive manner with a Ki value of 4.3 x 10(-10) M. The other validoxylamines and validamycins also exhibited the activity in vitro. Injection of these compounds to young last instar larvae of the tobacco cutworm, Spodoptera litura, elicited the morphological abnormality followed by death after the cessation o...

Biotransformation of nerol by larvae of the common cutworm (Spodoptera litura) was investigated. The resulting major metabolites were (2Z,6E)-1-hydroxy-3,7-dimethyl-2,6-octadien-8-oic acid and 8-hydroxynerol, and the minor metabolites were 9-hydroxynerol and (2Z,6E)-1-hydroxy-3,7-dimethyl-2,6-octadien-8-al. (2Z,6E)-1-Hydroxy-3,7-dimethyl-2,6-octadien-8-oic acid is a novel compound. The results ...

Insecticidal crystal proteins of Bacillus thuringiensis bind to receptors in the midgut of susceptible insects leading to pore formation and death of the insect. The identity of the receptor is not clearly established. Recently a direct interaction between a cloned and heterologously expressed aminopeptidase (slapn) from Spodoptera litura and the Cry1C protein was demonstrated by immunofluoresc...

Pengendalian hama secara kimiwai telah menimbulkan dampak negatif sehingga pengendalian yang ramah lingkungan sangat perlu dikembangkan di antaranya adalah penggunan agen pengendali hayati seperti Beauveria bassiana. B. bassiana merupakan salah satu berpotensi untuk mengendalikan berbagai spesies ulat gerayak Spodoptera litura. Kajian ini bertujuan mengetahui efektivitas dari media padat terhad...

Armyworm (Spodoptera litura) is an important pest that damages the leaves of soybean. SlNPV one type pathogen has potential as a biocontrol agent to control armyworms because it specific, selective, and effective. This study aimed investigate compatibility between lemongrass in controlling armyworm. The Research was conducted at Laboratory Indonesian Legumes Tuber Crops Institute (ILETRI) from ...

Tanaman jagung merupakan salah satu tanaman pangan yang biasa dikonsumsi masyarakat Indonesia. Kerusakan akibat serangan Spodoptera litura pada mencapai 85% bahkan dapat menyebabkan gagal panen. Salah upaya untuk mengendalikan ialah menggunakan entomopatogen Beauvaria bassiana. Tujuan penelitian ini adalah mengetahui pengaruh aplikasi bassiana (Bals.) Vuil. terhadap mortalitas dan intensitas li...

Volicitin [N-(17-hydroxylinolenoyl)-L-glutamine] has previously been identified from the lepidopteran larval regurgitant as an elicitor of plant volatile emission. The efficient incorporation of free oxygen into volicitin by Spodoptera litura larvae is demonstrated here by rearing them under (18)O(2) for three days. (18)O-labeling of the hydroxyl group of volicitin was confirmed by liquid chrom...

If the carbon dioxide (CO(2)) concentration in the atmosphere changes in the future, as predicted, it could influence crops and insect pests. The growth and development of the tobacco caterpillar, Spodoptera litura (Fabricius) (Noctuidae: Lepidoptera), reared on peanut (Arachis hypogea L.) foliage grown under elevated CO(2) (550 ppm and 700 ppm) concentrations in open top chambers at Central Re...

Herbivory-induced responses in plants can both negatively affect subsequently colonizing herbivores and mitigate the effect of herbivory on the host. However, it is still less known whether plants exhibit specific responses to specialist and generalist herbivores in non-secondary metabolite traits and how specificity to specialists and generalists differs between invasive and native plant popul...

Eight chimeric insecticidal protein (IP) genes were constructed between the 130-kDa and 135-kDa IP genes of Bacillus thuringiensis subsp. aizawai, and expressed in Escherichia coli JM103 cells. The characterization of the produced chimeric IPs indicated that the variable region (VR1) in the amino-terminal half of the IPs is responsible for the insecticidal activity against larvae of Spodoptera ...