Abstract: In order to ensure grain production,utilize resources rationally,protect ecological environment and help farmers get higher income, the researches on planting patterns of intercropping grain and fruit were carried out in Pingguan county of Shandong province in 1986-1992.The results show that intercropping grain and fruit can enlarge the utilization of natural resources,increase the total output,per unit area,and enrich the soil with organic matter,total N, hydrolyzable N and available K,which is a planting system with fairness,elasticity and high efficiency for sus-tained agriculture.

Key words: B-biotype Bemisia tabaci, tomato, volatile, host selection, olfactory response.