Abstract:

Fruit flies are one of the hazards that affect the production efficiency of Chinese bayberry, and attractants are effective measures to lure and kill fruit flies. This study analyzed the correlation between the quality indicators of Chinese bayberry fruit and the number of fruit fly larvae. It was found that the total acid content, citric acid content, malic acid content, and oxalic acid content of the Chinese bayberry fruit were significantly positively correlated with the number of fruit fly larvae. Further adjustments were made to the ratio of sugar to vinegar, and high sugar to vinegar ratio (2∶1) and low sugar to vinegar ratio (1∶2) fruit fly attractants containing microbial source attractants were formulated. Different cultivation methods, such as trellis cultivation and early facility cultivation, were set up to analyze the control effect of different cultivation methods on fruit flies with open field cultivation as a control. The results showed that the early facility cultivation had the highest control effect (77.57%)on fruit files, followed by trellis cultivation (71.96%), and the low sugar to vinegar ratio attractant had a significantly higher control effect (65.58%) than the high sugar to vinegar ratio attractant (32.87%); The usage parameters of low sugar to vinegar ratio attractants had been clarified. About 20 days before harvesting, they are hung on the outer branches of the tree about 1.5 meters above the ground, with one bottle hung with one tree in between (about 10 meters apart). The prevention effect can reach 64.01%. This method is a fruit fly trapping technique with obvious prevention effect, low cost and long-lasting effectiveness.

Key words: Chinese bayberry, fruit flies, attractants, prevention and control