Demographic Analysis Armoured Scale (Diaspididae Family) on Apple Plant in Junggo, Tulungrejo Village, Bumiaji District, Batu City

Abstract

Scales have attacked Bumiaji District such as Tulungrejo village. This pest is a perennial pest on apple crops and difficult to control. Scales (Hemiptera: Diaspididae) are pests native to Southeast Asia, India, Korea and China. At present, scales have spread widely throughout the world, in all tropical and subtropical regions. Scales have spread to several countries, namely the Mediterranean, South Africa, South America, Australia, New Zealand, the Pacific islands, peninsulas of India, the Philippines, the Middle East, Japan and Indonesia. Demographic analysis is carried out on the birth, death and reproduction schedule of a population so that life history will be obtained. The traps used are sticky traps and color traps. Determination of sample plants was carried out systematically as many as 48 plants sampled (10% X apple population in 1 field) on Manalagi apple plants (Malus sylvestris). The sample plants are apple plants that are affected by scales. Demographic analysis of scaly ticks obtained was a gross reproduction rate (GRR) of 138 individuals per generation, a net reproduction rate (Ro) of 1322 individuals per parent per generation, intrinsic accretion rate (rm) of flea scales of 0.03 individuals per parent per day , the generation period (T) of 7.20 months scale ticks so that there are 1-2 generations per year and a double period (DT) that is for 23.10 days.