山地杏园桃小食心虫的危害与防治研究初报

A Preliminary Study on the Harm of Carposina Niponensis Walsingham to Apricot Orchard in the Hilly Areas and the Pest Control

认为桃小食心虫Carposina niponensis Walsingham在山地杏园中一年发生1～2代,在土内作扁圆形冬茧越冬,以越冬代成虫对杏果造成产卵危害,蛀果率高,损失极为严重。进而认为桃小食心虫的越冬成虫在山地杏园的发生与危害较苹果产区的时间,一般要提早10天左右,这也和食物因子以及山地杏园的田间小气候有直接关系。经防治试验后,杏的虫果率被控制在3％以下,取得了明显的防治效果。

Carposina niponensis Walsingham is one of the most important pests of apricot orchard in the hilly areas in Shangzhou city, Shaanxi province, when the apricot fruits are ripe, as many as 50～70 percent of the orchards is seriouses harmed in some districts. The production of hilly apricot has substained heavy losses. The happening rule and biology of the pest and the method of its control were studied during 1988 to 1991. The metnod effectuated obviously and the injuried fruits rate is controlled under three percent of the ripe apricots.