Attraction Of Volatiles From Wilted Leaves Of Populus Simonii Carr. On Helicoverpa Armigera

Helicoverpa armigera (Hübner) is a serious pest of cotton in China. It took place and harmed the crops seriously in recent years in our country,has become an important country wide agrieulture pest,we have not effitive methods to control it at present.It is an important way to control H. armigera (Hübner) with withered Populus simonii Carr Branches. Filed and labbioassay experiments of attraction of the volatiles from wilted leaves of Populus simonii Carr for H. armigera (Hübner) were conducted. The main results are as follows:The Extraction of Populus Simonii Carr Attract Helicoverpa armigera ( Hübner):It can conclude from the experiment that not only wilt branches and leaves but also only leaves can attract cotton worm which could prove that wilt leaves of the Populus simonii Carr can attract adults cotten worm.The experimentation were done indoor and outdoor in order to validate whether the volatile sprite of the wilt leaves can attract adults of cotton worm,and the results testified the wilt leaves of Populus simonii Carr can attract Helicoverpa armigera ( Hübner).While extraction of the wilt leaves can also atrract adult Helicoverpa armigera ( Hübner).Attraction of Populus simonii Carr and black light lamp for Cotton Bolloworm Helicoverpa armigera ( Hübner): The trapping effects of three generations Helicoverpa armigera in cotton field had showed that black light lamp had trapped more moths than Populus simonii twig bundles;the trapped female moths as more as male moths;the number of the males captured was not correlated significantly with that of the female captured(P>0.05);the quanlity of egges near the Populus simonii twig bundles was correlated significantly with that the quanlity of egges near the black light lamp(P>0.05);the quanlity of egges near the black light lamp was not correlated significantly with that of the contract.So at the max time of the moths appearing it is better to use black light lamp and Populus simonii Carr twig bundles to attract the moths.The preliminary analysis of the components of the volatiles from withered Populus simonii Carr leaves: A study was reported about the chemical components of the volatilizing odor from Populus simonii Carr leaves. The odor was extracted by steam distillation and further identified by gas chromatograph-mass spectrometry, sixteen peaks were obtained from the extracted odor, in which sixteen components were identified. Among these components, the number of Cycloheptanone and 1,2-Cyclohexanedione was the largest,and their percents are 33.93% and 31.55%.It can conclue that components of the volatiles from withered Populus simonii Carr leaves may be has attractive effect to Helicoverpa armigera (Hüber) .Effects of interaction of Populus simonii volatiles on EAG response of Helicoverpa armigera (Hüber): The Electroantennographic (EAG) responses of Helicoverpa armigera (Hübner) moths to eight kinds of Populus simonii Carr volatiles were tested. Nomated-Male moths, Virgin, mated male, mated female moths to eight Populus simonii Carr volatiles were significant different(P<0.05), This indicated that different component of Populus simonii Carr volatiles might induced different behavior function. Significant differences of EAG response to sigal component and mixtures component of Populus simonii Carr volatiles(P<0.05).Different day-old Helicoverpa armigera Hüber EAG response to Populus simonii Carr volatiles were different.Attraction of volatiles from wilted leaves of Populus simonii Carr. on Helicoverpa armigera (Hübner)moth:It can conclued from the experiments that Populus simonii Carr can attract Helicoverpa armigera Hüber not because of its especially structure but because of its especially volatiles compounds.