Studies On The Alluring Role And Mechanism Of Sugar-acetic-acid Liquid To Grapholita Molesta

Grapholita molesta Busck belongs to Lepidoptera and it is the fruit tree pest worldwide. Its diets and host plants is widespread. It is widely distributed in major fruit area, It is seriously harmful to fruit production, so the prevention and cure of Grapholita molestahas attracted widespread attention.At present, the main control method is chemical control, resulting in pesticide residues, declining fruit quality, reducing natural enemies, destroying the ecological balance a series of drawbacks.Sugar-acetic-acid liquid is a kind of pollution-free pest control measures. This paper aims to study Grapholita aluring by sugar-acetic-acid liquid and the reaction behavior of Grapholita to the volatile chemicals of sugar-acetic-acid liquid. It provides a theoretical basis and factual basis for the proven attraction to sugar-acetic-acid liquid for Grapholita molesta, and pollution prevention Grapholita molesta. The major results outlined as following:(1) Using the method of Orthogonal experimental design, the test set 9 different proportions of sugar-acetic-acid liquid in the field to lure Grapholita molesta. The test to select 10-year-old peach base, randomly placed in nine different proportions sugar-acetic-acid liquid and contrast, then record the number of Grapholita molesta. The results found that sugar-acetic-acid liquid lured the best effect when brown sugar: vinegar: Liquor: water = 1:1.4:1:12, sugar-acetic-acid liquid for Grapholita molesta adults lure the best.(2) A y-tube olfactometer was used to compare the preferences of the Grapholita molesta adult for the nine different proportion of Sugar-acetic-acid liquid. It was found that male and female adults of Grapholita molesta showed the strongest trend when brown sugar: vinegar: liquor: water =1:1.4:1:12.(3) We combinationed of dynamic headspace acquisition, thermal desorption and GC-MS technology to analys the volatile chemicals of Sugar-acetic-acid liquid. We can get fifteen substances.Ketones, aldehydes, esters relative contents was about 41.45%, 25.84%, 21.96%.A y-tube olfactometer was used to compare the preferences of the Grapholita molesta adult for the standard compounds. So we obtained two kinds of substances which can make Grapholita molesta produce taxis.Then Ethanone,1-(4-ethylphenyl)- can make female adult produce taxis, and Ethanone,1-(3,4-dimethylphenyl)- can make male adult produce taxis.