Abstract:

To clarify the application effect of Grapholitha molesta (oriental fruit moth, OFM) in Linqu cherry orchards, a field survey was conducted to monitor the occurrence dynamics of the oriental fruit moth and compared the mating disruption effect and rate of shoot decay in Linqu cherry orchards in 2021 by hanging disorientated wire. The results showed that the occurrence of G. molesta was from early April to July, and the occurrence of G. molesta adults was the highest on April 26 and June 14, with 33 and 38 adults per trap, respectively. After comparing different numbers of disorientated wire, it was found that the mating disruption rate under 300 clips/hm² treatment was the lowest, while that under 450 clips/hm² and 600 clips/hm² treatments had no significant difference, both were above 89%. The shoot decay rate of the treated orchards was obviously lower than that of the control area, and the control effect on shoot decay was more than 80%. According to the critical periods of the occurrence of G. molesta, hanging 450 clips/hm² of disorientated wire can basically control the occurrence and avoid the damage of G. molesta.

Key words: cherry orchard, oriental fruit moth, disorientated wire, mating disruption effect, biological control