Murad, Khodijah U.F. and Nukmal, Nismah (2020) The Effect of Storage Time on the Raw Material of Insecticide Candidate from Gamal Leaves (Gliricidia maculata) on The Stability of Toxicity to Control Mealy Bugs. In: 1st Universitas lampung International Conference on Science and Technology 2020, 19th November 2020, Zoom. (Submitted)

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Abstract. Mealybugs are pests that cause economic losses to cultivated crops such as papaya and cocoa. Mealybug pests cause productivity and fruit quality to decrease. Control using botanical insecticides that are more environmentally friendly can be done, one of which is using gamal leaves (Gliricidia maculata). Research on the potential of gamal leaves as a vegetable insecticide has been carried out in the last 10 years. To develop it into a botanical insecticide formula, a basic study is neededlevels of flavonoids and their toxicity to storage time. This study aims to determine the toxicity and levels of active compounds in the form of flavonoids on the storage time of gamal leaf powder. The test used raw materials for gamal leaves from 3 different origin of plant, namely North Lampung, West Lampung, and Pringsewu in the form of a powder which is then extracted using water and methanol as a solvent. The toxicity test used bioassay with the residual effect of two extracts, namely water extract and methanol extract against mealybugs. Mortality data were analyzed using probit analysis to determine LC50. The correlation between storage time and toxicity was analyzed using correlation analysis with the SPSS application.. The yield of methanol and water extract was decrease 1.05% – 9.41% and 0.34% - 34.70% this indicate that extract methanol of G. maculata more stable than water extract.The LC50 value from the probit analysis tended to increase between 0.011% - 0.077% with the storage time of powder raw materials, this indicated a decrease in the effectiveness of the toxicity between 28.2 - 78.1% depending on the type of origin of plant gamal leaf. The results show that the storage time of 6 - 24 months does not have significant effect on the stability of the toxicity and yield of the insecticide raw material powder from gamal leaves, but the longer the storage time, the lower the toxicity

Item Type: Conference or Workshop Item (Speech)
Subjects: Q Science > Q Science (General)
Divisions: Fakultas Matematika dan Ilmu Pengetahuan Alam (FMIPA) > Prodi Magister Ilmu Biologi
Depositing User: Ph.D Nismah Nukmal
Date Deposited: 18 Nov 2020 04:53
Last Modified: 18 Nov 2020 04:53

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