Regulation of digestive enzymes activity and main metabolites of Agrotis ipsilon (HUFN.) and Heucoverpa armigera (HBN.) larvae in response to kinin peptide [electronic resource].

Includes reference.

Kinin-peptides are a group of structurally related neuropeptides stimulating gut motility and fluid by Malpighian tubules in insects. For studying the effect of these neuropeptides on digestive enzymes activities and concentration of main hemolymph components, leucokinin IT was injected into Agrotis ipsilon (Hufn.) and Helicoverpa armigera (Hbn.) 5th instar larvae at doses of 20, 25, 30 and 40 μl. The neuropeptide leucokinin II reduced the release of digestive enzymes, protease, amylase and trehalase; also, it inhibited the fonnation of total protein. Meanwhile, it exerted a stimulatory effect by increasing the activity of invertase enzyme and the formation of total carbohydrates and total lipid in both A. ipsilon and H. armigera larvae.

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