Preliminary study on the transfer pattern of Grapholita moles ta between peach and walnut orchards
To determine the best time window for G.molesta control in walnut orchards,the transfer damage and population dynamics of Grapholita molesta between peach and walnut orchards in Hotan county was studied.Monitoring sites were set up in both peach and walnut orchards.Occurrence dynamics of G.molesta between peach and walnut orchards were monitored,and egg-laying situation and fruit decay rate were investigated in walnut orchards.The results indicated that there were five generations of G.molesta in one year in peach orchards in Hotan county.Overwintering adults started to appear in late March,and adults of each generation peaked in early April,mid-May,late June to early July,late July to early August and early September.The first generation and the second generation occurred seriously,with the phenomenon of overlapping.Two generations occurred in walnut orchards in one year,with adults laying eggs on walnut fruit and leaves,mainly with larvae harming the fruit.In late June,it started to move from the peach orchard to the walnut orchard,and in late August it moved from the walnut orchard to the peach orchard,with an obvious pattern of host transfer.Early July is the critical period for G.molesta control in the walnut orchard.
万方数据
维普
