Observation on the overwintering sites and early spring transfer damage pattern of Apolygus lucorum Meyer-Dür in apple orchard in the Jiaodong area
The aim of this study was to elucidate the overwintering and early spring transfer pattern of Apolygus lucorum Meyer-Dür in apple orchards in the Jiaodong area from 2020 to 2021.The number of overwintering eggs laid by A.lucorum on apple bud scales,pruning wounds,old warped barks,and branch tips was investigated.The number of A.lucorum trapped by the sticky tape at 0.5 m and 1.0 m from the ground,and the damage on apple root seedlings and weeds within 1.0 m diameter were investigated.The results showed that the majority of overwintering eggs were found at the bud scales,followed by the pruning wounds,accounting for 60.58％and 32.69％of the total eggs,respectively.The number of eggs at bud scales and the pruning wounds decreased over time,with a greater decline observed at the bud scales.The number of A.lucorum trapped by sticky tape at 0.5 m above the ground was significantly higher than or equivalent to that caught at a height of 1.0 m.The peak of catching occurred on 5 May,with the majority of A.lucorum caught in two periods,6:00-8:00 and 20:00-22:00.The number of A.lucorum trapped in the late peak was relatively larger,and the number trapped on the shady side was greater than that on the sunny side.A.lucorum presented a clear preference for different host plants in the apple orchard.From 21 April to 5 May,the root seedlings suffered the most,followed by Hemisteptia lyrata,Malus pumila,Humulus scandens,Artemisia argyi,Amaranthus retroflexus and Solanum nigrum.On 12 May,the damaged rate of apple shoots was 48.03％,which was higher than that of other hosts.
appleApolygus lucorum Meyer-Düroverwinteringearly spring transfer habit
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万方数据
