| Asiatic apple leafminer (Lithocolletis ringoniella Mats.)is an important pest being harmful to apple production in Luochuan counry, Shaanxi province. The occurrence capacity of Asiatic apple leafminer has been observed by using attractant in apple orchards, and the relationship between the occurrence capacity and meteorological factors has been analyzed. The results indicate that there is a significant relationship between the occurrence capacity and humidity. The occurrence of overwintering generation in March is quite coinstantaneous with a small population, when is the best period to control it. |