Occurrence dynamics of Grapholita molesta and Carposina sasakii in pear orchard in Baiyin and Zhangye,Gansu province
In Baiyin and Zhangye,Gansu province,triangular traps were used to monitor the number of adult populations of Grapholita molesta and Carposina sasakii,and the dynamic changes of the populations of the two types of fruit-boring pests were analyzed during the three consecutive years(2021-2023).The result show that,G.molesta is the dominant pest in the region.It has three generations and an incomplete 4th generation throughout the year.Overwintering adults begin to appear in early to April.The first-generation peak period is from mid-May to beginning of June.The peak of the second generation is in the early to middle of July.The peak of the third generation occurs from late August to mid-September.The total amount of moths in different regions and years varied greatly,with a maximum of 3 835 moths per trap and a minimum of 412 moths per trap,respectively.In this region.C.sasakii occurs two generations a year,with a relatively low occurrence rate,annual trapping amount below 70 per trap.By collating and analyzing three years of data from three monitoring sites,we preliminarily grasped the occurrence regularity of G.molesta and C.sasakii in Gansu province.To achieve good control effect,prevention and control should be carried out in mid-April before the peak of the overwintering generation.
Grapholita molestaCarposina sasakiioccurrence dynamicsfruit-boring pest
NETL
NSTL
万方数据
