Parameter Kehidupan Dan Demografi Kepik, Diconocoris Hewetti (Dist.) (Hemiptera: Tingidae) Pada Dua Varietas Lada

Abstract

Life parameters and demographic of bug peper laceDiconocoris hewetti (Dist.) (Hemiptera: Tingidae) on twopepper varietiesPepper lace bug (PLB), Diconocoris hewetti (Dist.) (Hemiptera:Tingidae), is one of the insect pests attacking pepper in Indonesia.Research was conducted with the objective to compare various life historyand demographic parameters of PLB on two pepper varieties. The effectof two pepper varieties on various life parameters and demographic ofPLB was conducted in green house and farmer field on Bangka Island,since October 2003 to February 2004. The experiment covered the effectof LDL and Chunuk varieties on eggs and nymphal development, maleand female adults longivity and fecundity. Besides the effect ofdevelopment stage on inflorescence, shoots and young berries to adultslongivity were observed. The effect of varieties to demographic parametersof PLB was studied by rearing the bugs since egg to adult laid eggs. Theresult revealed that difference variety was influenced life history anddemographic parameters of PLB. Nymphal development time of PLB were17.3 and 13.0 days, male adult longivity 10.2 and 18.8 days, female adultlongivity 13.6 and 16.9 days, fecundity 13.9 and 24.5 eggs per female,respectively on Chunuk and LDL. The life history of PLB adult was longeron stage-3 inflorescences than stage-1 or stage-2. The intrinsic rates ofincrease (r) were 0.0741 and 0.0827, net reproductive rate (Ro) 6.98 and8.52, mean generation time (T) 26.21 and 25.91 days, finite rate ofincrease (λ) 1.0769 and 1.0862 on Chunuk and LDLrespectively.Generally, variety LDL was much better food source for thedevelopment of D. hewetti. If there were no inflorescences available, thePLB was able to survive by feeding on shoots or young berries. Adultlongivity was 12.1 days on shoots and 23.5 days on young berries. Theimplication of this research is as the basic information in the next researchfor PLB control