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EFEKTIVITAS APLIKASI KOMBINASI EKSTRAK RUMPUT GRINTING (Cynodon dactylon) DAN UMBI TANAMAN GADUNG (Dioscorea hispida Dennst) SEBAGAI UPAYA MENEKAN INTENSITAS SERANGAN HAMA VEKTOR VIRUS MOSAIK (Aphis glycine) PADA TANAMAN KEDELAI (Glycine max L.)

MALIK, FAHMI FAISHAL (2018) EFEKTIVITAS APLIKASI KOMBINASI EKSTRAK RUMPUT GRINTING (Cynodon dactylon) DAN UMBI TANAMAN GADUNG (Dioscorea hispida Dennst) SEBAGAI UPAYA MENEKAN INTENSITAS SERANGAN HAMA VEKTOR VIRUS MOSAIK (Aphis glycine) PADA TANAMAN KEDELAI (Glycine max L.). Bachelors Degree (S1) thesis, University of Muhammadiyah Malang.

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Abstract

A. glycine soybean infestation caused yield loss reaching 58%. Environmentally friendly controls using vegetable ingredients will maintain environmental quality. This study was conducted to determine effectiveness of combined of gadung tuber and grass grinting extracts on soybean virus (A. glycine) vector pests and to know the mechanism of toxicity to these pests. The research was conducted from June to September 2018. The research began with extracting of gadung tuber and grinting, phytochemical screenning, preparation of soybean plants, rearing and collection of aphids, investment in aphids, in vitro testing and in vivo tests on bioassays. The effectiveness test of the application uses a simple Randomized Block Design (RBD). Variation analysis at 5% level, and Duncan's Multiple Range Test (DMRT) test. Calculations of LC50 and LT50 use probit regression analysis. The results showed that the highest compounds contained in gadung tubers were alkaloids, whereas in grinting grasses were saponins. Both of these compounds have the potential as a base for vegetable insecticides. The percentage of A. glycine mortality in P2 (Positive Control), P3 (1: 0) and P7 (3: 2) treatments was calculated from observations in the 60th minute, while treatment P4 (0: 1), P5 (1: 3) and P8 (3: 1) began to have A. glycine mortality in the 180th minute. Meanwhile, other combination treatments showed A. glycine mortality rates at 360 minutes. The combination treatment of gadung extract and grinting 3: 2 (v / v) (P7) and 3: 1 (P8) showed the most effective results compared to positive controls and other treatments with mortality mean values at all observations of 87.44% and 86, 7%. The LC50 value of gadung extract at the first observation was 3%, the grinting extract was 3.08%. The lowest LT50 value is in treatment P7 (3: 2) with a time of 3.88 hours. a combination of gadung extract and grinting can suppress A.glycine infestation and potentially a plant-based insecticide.

Item Type: Thesis (Bachelors Degree (S1))
Additional Information: 201510200311130
Uncontrolled Keywords: LC50, LT50, Mortality
Subjects: Q Science > QK Botany
S Agriculture > S Agriculture (General)
S Agriculture > SB Plant culture
Divisions: Faculty of Agriculture & Animal Husbandry > Department of Agrotechnology
Depositing User: Administration Library UMM 2
Date Deposited: 31 Jan 2019 02:10
Last Modified: 31 Jan 2019 02:10
URI : http://eprints.umm.ac.id/id/eprint/43837

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