Abbreviation of Scales on Apple Plant in Junggo (Tulungrejo Village of Batu City, Indonesia)

Abstract

Scales have attacked 9 hectares of apple land spread in 8 villages of Bumiaji sub-district such as Giripurno village, Tulungrejo village, Pandanrejo village, Sumbergondo village, Bulukerto village, Punten village, Gunungsari village, and Bumiaji village. This pest is a perennial pest on apple crops and difficult to control. The current way of control has not been able to overcome this pest problem. This research was conducted to find out abbreviation of scales on apple plant at Junggo, Tulungrejo Village, Bumiaji Sub-district, Batu City. Number of duct tape observed as many as 18 units of experiment and trap color as much as 30 unit experiment. The results showed that the total population of scales that can occur in one year is 1322 individu with a generation of 7.20 months and the rate of breeding speeds of 3.21in one parent. Decrease of scales occurs in March to May and September to November. In March to May it is suspected to be caused more by natural enemies, whereas in September to November it is caused more by rainfall factor.