Sinergisme Serbuk Daun Ageratum conyzoides, Rimpang Curcuma longa, dan Zingiber officinale terhadap Sitophilus oryzae L.

Abstract

Sitophilus oryzae are one of the most serious stored grain pests in the worldwide. Control by using synthetic insecticides with fumigation on can cause to S. oryzae resistance. One way of control that can be applied is to use a botanical insecticide. The research aimed to determine the synergism of A. conyzoides leaf powder, rhizome Curcuma longa and Z. officinale against imago S. oryzae. The research methods included single and mixed toxicity testing. Application leaf powders A. conyzoides, rhizome C. longa, and Z. officinale separately as well as an effective mixture of S. oryzae. Application A. conyzoides leaf powder single have LC50 value 3.96 mg/g and LC90 15.43 mg/g, Z. officinale rhizome has a value LC50 6.29 mg/g and LC90 15.43 mg/g, and rhizome powder C. longa has LC50 value 5.27 mg/g and 31.49 mg/g. The mixture leaf A. conyzoides with Z. officinale rhizome powder has an LC50 value of 2.47 mg/g and LC90 of 6.86 mg/g, whereas the mixture with powder C. longa has LC50 2.75 mg/g and 12.85 mg/g. The mixture of leaf powder A. conyzoides with rhizome C. longa and Z. officinale is more toxic than its single and synergistic to imago S. oryzae. The mixture A. conyzoides leaf powder with Z. officinale rhizome powder is more toxic and synergic than its mixture with rhizome powder C. longa. Application leaf powder A. conyzoides, rhizome powder C. longa and Z. officinale on single and mixture can be used to control S. oryzae pests in grain during storage