| Animal Research: |
| Journal of Northwest Forestry University, 2014, 29(1):105-10. | | The Preliminary Study on Pesticidal Activity of Main Components in Coriaria Lactone[Reference: WebLink] |
METHODS AND RESULTS:
Toxic symptom and contact poisoning activity of tutin,Coriatin and corianin were observed on the larvae of Mythimna separata with 3,4,5and 6instars by leaf disk method and dripping method.The results showed that the poisoning symptoms for tutin included slow in action,coma,recovery,paralysis,and dehydration on body surface,but the symptoms did not appear by using Coriatin and corianin.After treated by different proportions(1∶3,1∶1,3∶1)of tutin and Coriatin,larvae with 3,4,5instars demonstrated the symptom of coma with various degrees,and the largest number of coma was 4instars,and the coma disappeared in 6instars.Different proportions of tutin and corianin caused a decreased number of coma symptom in the larvae with 3,and 4instars,and partial coma in 6instars.Direct dripping different concentrations of tuin to each instars insect demonstrated poisoning actions,concentration 1.00mg·mL-1 exhibited the strongest poisoning effect.Different ratios of tuin and Coriatin,tuin and corianin on armyworm had significant influence on appetite and cumulative mortality rates,along with the increase of Coriatin and corianin, the impact on armyworm food intake and cumulative mortality was more significant.
CONCLUSIONS:
It was preliminarily concluded that Coriatin and corianin demonstrated synergistic effect to insecticidal activity of tutin againstarmyworm. |
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