The tea tussock moth(Euproctis pseudoconspersa)is one of the most destructive chewing pests in tea plantations and causes a serious allergic reaction on the skin of tea plantation workers.The sex pheromone components ...The tea tussock moth(Euproctis pseudoconspersa)is one of the most destructive chewing pests in tea plantations and causes a serious allergic reaction on the skin of tea plantation workers.The sex pheromone components of its Japanese population were first identified as 10,14-dimethylpentadecyl isobutyrate(10Me14Me-15:iBu)and 14-methylpentadecyl isobutyrate(14Me-15:iBu),with a stereogenic center.Only 10Me14Me-15:iBu has been identified in the Chinese E.pseudoconspersa population.However,field tests have shown that 10Me14Me-15:iBu cannot meet the demand of effective pest control in China.To develop a high-efficiency E.pseudoconspersa sex pheromone formula,electroantennogram(EAG)recordings of(S)-and(R)-enantiomers of 10Me14Me-15:iBu and 14Me-15:iBu were obtained in the present study.The results demonstrated that the EAG responses of male antennae to(R)-enantiomers were significantly higher than responses to the(S)-enantiomers,and 14Me-15:iBu also elicited EAG activity.Field tests showed that the catch numbers of male moths by(R)-enantiomers were significantly higher(P<0.05)than those of(S)-enantiomers.Addition of 14Me-15:iBu significantly increased the catch numbers of both the(S)-and(R)-enantiomers.The efficient pheromone formula containing 0.75 mg(R)-10Me14Me-15:iBu and 0.1 mg 14Me-15:iBu showed significantly higher attractiveness than commercial pheromone products.Our study demonstrated that(R)-10Me14Me-15:iBu was the major sex pheromone component of E.pseudoconspersa,and 14Me-15:iBu might be the minor sex pheromone component.Furthermore,a high-efficiency sex pheromone formula for E.pseudoconspersa control was defined in this study.展开更多
The principal component method is to recombine multiple correlated indexes into a group of non-correlated comprehensive indexes to replace the original indexes for evaluation. The paper took the test data of growth an...The principal component method is to recombine multiple correlated indexes into a group of non-correlated comprehensive indexes to replace the original indexes for evaluation. The paper took the test data of growth and development of Euproctis pseudoconspersa Strand as a basis and used the principal component analysis method to analyze and investigate the test data. The research results indicate that the principal component analysis method is a model with actual operation value and evaluation reliability. When the electromagnetic radiation is higher than 100 K, the growth and development indexes of E. pseudoconspersa Strand are correlated to electromagnetic radiation frequency to some extent.展开更多
基金the National Key R&D Program of China(2021YFD1601100)the Key Research and Development Program of Zhejiang Province,China(2019C02033)+1 种基金the National Natural Science Foundation of China(31701795)the earmarked fund for the China Agriculture Research System(CARS-19).
文摘The tea tussock moth(Euproctis pseudoconspersa)is one of the most destructive chewing pests in tea plantations and causes a serious allergic reaction on the skin of tea plantation workers.The sex pheromone components of its Japanese population were first identified as 10,14-dimethylpentadecyl isobutyrate(10Me14Me-15:iBu)and 14-methylpentadecyl isobutyrate(14Me-15:iBu),with a stereogenic center.Only 10Me14Me-15:iBu has been identified in the Chinese E.pseudoconspersa population.However,field tests have shown that 10Me14Me-15:iBu cannot meet the demand of effective pest control in China.To develop a high-efficiency E.pseudoconspersa sex pheromone formula,electroantennogram(EAG)recordings of(S)-and(R)-enantiomers of 10Me14Me-15:iBu and 14Me-15:iBu were obtained in the present study.The results demonstrated that the EAG responses of male antennae to(R)-enantiomers were significantly higher than responses to the(S)-enantiomers,and 14Me-15:iBu also elicited EAG activity.Field tests showed that the catch numbers of male moths by(R)-enantiomers were significantly higher(P<0.05)than those of(S)-enantiomers.Addition of 14Me-15:iBu significantly increased the catch numbers of both the(S)-and(R)-enantiomers.The efficient pheromone formula containing 0.75 mg(R)-10Me14Me-15:iBu and 0.1 mg 14Me-15:iBu showed significantly higher attractiveness than commercial pheromone products.Our study demonstrated that(R)-10Me14Me-15:iBu was the major sex pheromone component of E.pseudoconspersa,and 14Me-15:iBu might be the minor sex pheromone component.Furthermore,a high-efficiency sex pheromone formula for E.pseudoconspersa control was defined in this study.
基金Supported by Science and Technology Program of the Education Department of Shaanxi Province Government(16JK1158)
文摘The principal component method is to recombine multiple correlated indexes into a group of non-correlated comprehensive indexes to replace the original indexes for evaluation. The paper took the test data of growth and development of Euproctis pseudoconspersa Strand as a basis and used the principal component analysis method to analyze and investigate the test data. The research results indicate that the principal component analysis method is a model with actual operation value and evaluation reliability. When the electromagnetic radiation is higher than 100 K, the growth and development indexes of E. pseudoconspersa Strand are correlated to electromagnetic radiation frequency to some extent.
