Study on the Overwintering Characteristics and Control Strategies of Psylla chinensis
- Received Date: 01/06/2021
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Key words:
- Psylla chinesis /
- overwintering place /
- corrugated paper /
- sulphur mineral oil
Abstract: To develop more effective control strategies of Psylla chinensis in China, this study used corrugated paper to simulate the overwintering place of the pest, and explored the relationship between its overwintering behavior and the environmental temperature, as well as the characteristics of the overwintering parts of the pear tree. The trapping and killing effects of the combination of "corrugated paper + pesticides" and "corrugated paper + black film" on winter-form pear psylla were also studied. The results showed that when the average temperature was 5℃, the winter form pear psylla began to move toward the overwintering places; when the average temperature was 0℃, few pear psylla were found in the orchard and basically entered the overwintering state; pear psylla mainly moved from the branch tip to the main stem and main branches for overwintering. The pesticides (sulphur mineral oil, sodium rosinate, lime sulfur mixture, bifenthrin and chlorpyrifos) and corrugated paper could repel the overwintering pear psylla, and sulphur mineral oil showed the highest repellent effects. The temperature of the overwintering place and the mortality of pear psylla could be increased through corrugated paper and black film method.