Control methods and key technical points for the peach fruit moth

(1) Manual and physical control. Scraping bark to destroy pupae: during the dormant season of winter jujube, manually scrape off the coarse bark and scaly bark on the trunk and branch forks; beforehand, spread plastic sheeting under the tree to collect the bark and cocoons, then pour boiling water over them in a centralized manner. Blacklight trapping of adults: during the adult emergence period, set up blacklight lamps (insect-killing lamps) to trap and kill adults. From May to June, remove the moth cocoons missed by chemical control. From early September, tie grass bundles at the trunk and branch forks to attract the insects for pupation, then take them down and burn them.

(2) Chemical control. The key is to carry out control of the first-generation larvae well, basically in sync with the jujube geometrid, and the pesticides used are the same. Control of the second-generation larvae coincides with the period around the flowering stage, when natural enemy organisms occur in large numbers; when selecting pesticides, avoid harming natural enemies and honeybees. Benzoylurea insecticides can be used, such as 20% triflumuron suspension concentrate at 8000-10000 times dilution, with a residual effect lasting more than 15 days; alternatively, 5% Cascade (flufenoxuron) emulsifiable concentrate at 1500 times dilution can be used to also control spider mite pests. In combination with these pesticides, choose 20% Amitraz (amitraz) at 1000-2000 times dilution, 20% Miesijing at 2000-3000 times dilution, or 50% Miesijing suspension concentrate at 5000-6000 times dilution.

(3) Biological control. Mating disruption using sex pheromones: see the relevant content on peach fruit moth sex attractants described earlier. Biological control with natural enemies: under conditions that protect natural enemies, release of Trichogramma can be used; during the egg-laying period of the second-generation adults (starting in mid-to-late July), release 3000-5000 Trichogramma dendrolimi per tree; based on field egg surveys, it is best to release once each at the early and peak stages of eggs (with an interval of about 4 days each time), and the field egg parasitism rate can reach more than 85%. Use of microbial insecticides: spray Bt (10 billion viable spores/g) emulsion at 500 times dilution, or Beauveria bassiana ordinary powder (10 billion viable spores/g) at 500-600 times dilution.