PENGARUH KONSENTRASI DAN INTERVAL BIOSIDA DAUN SIRSAT (Annona muricata) UNTUK MENGENDALIKAN HAMA ULAT KUBIS (Plutella xylostela)

Abstract

This study aims to determine the affect of concetration and interval awarding of soursop leaf biocide which are effective for controlling Plutella xylostela. The research was conducted at the green house and experimental garden of the Faculty of Agriculture of the University of Wisnuwardhana Malang, East Java from Juli to December 2015. This study used Randomized Completely Design (RCD), arranged in factorial consisting of th fisrt factor consosted of thr 4 levels (K) and the secon factor consists of 2 levels (J), then 8 treatment combinations were obtained. The results were obtained are : a) a combination of soursop leaf biocide treatment with a concentration of 100 gr/lt with a frequency of application 1 time (K2I1), biocide soursop leaf with a concentration of 100 gr/lt with a frequency of application 2 time (K2I2) and a soursop leaf biocide concentration of 150 gr/lt with an application frequency 2 time (K3I2) can control the population of Plutella xylostela pets by quickly starting first day  observation b) application of sirsak leaf biocide concentration of K2 gave the highest yield of  1042% higher for the wight of wet stover and soursop leaf biocide concentrade of 50 gr/lt (K1) 700% higher for stover weight compared to without biocide. c) application of soursop leaf biocide with a frequency of 2 time (I2) is able to control Plutella xylostela pests compared to other treatments d) Plutella xylostela life cicle from eggs to imago is 40 days