Study on Inhibition of Microcystis aeruginosa Crude extricated substance to the Trypsin-like of larvae of cotton bollworm(Helicoverpa armigera)'s Midgut in Different pH Conditions

In the experiments,we selected cotton bollworm(Helicoverpa armigera) as object of the studies.We detected the effect of which crude extricated substance inhibited the activity of trypin-like enzyme in Helicoverpa armigera mid-gut in pH=10.4 and pH=8.6 conditions.In both the different alkaline conditions,the inhibiting effect are stable and are ehanced with the increase in the concentration of microcystins crude extricated substance.However,in the pH=10.4 of the highly alkaline conditions inhibition efficiency was lower than pH = 8.6 in the weak alkaline conditions,the inhibition efficiency.With this inhibiting,effect of microcystins can influence digestion and the absorption of insects,and then affects its growth and devolepment,and so on,even death.We would not only to use it to kill the insect by the poison,but also to find one new living thing medicament or genetic engineering technical raw material will apply in pest's comprehensive program of public order.