Insecticidal Effect of Leaf Extract of Gamal (Gliricidia sepium) from Different Cultivars on Papaya Mealybugs (Paracoccus marginatus, Hemiptera: Pseudococcidae)
Journal Title: IOSR Journal of Agriculture and Veterinary Science (IOSR-JAVS) - Year 2019, Vol 12, Issue 1
Abstract
Polar extract of gamal leaves (Gliricidia sepium) from various cultivars in Lampung, Indonesia, is revealed to show insecticidal effect on various types of mealy bugs, but its effect on papaya meally bugs (Planacoccus marginatus) is not yet known. This study aims to determine the insecticidal effects of water extract formulation of gamal leaf powder from four different cultivars, namely Bandar Lampung (BL) cultivars, Pringsewu (PR), North Lampung (LU) and West Lampung (LB) against papaya mealy bugs. There were five formulation preapared namely Formula 1, 2, 3, 4 and 5. Each formula is differentiated based on the LC50 ratio of each cultivar extract (BL:PR:LU:LB) consecutively are 1:1:1:1, 2:1:1:1, 1:2:1:1, 1:1:2:1 and 1:1:1:2. Mortality data were analyzed by probit analysis to determine LC50, then continued with Anara test and LSD test with SPSS 16.0 to determine the effectiveness of the formulation. The results showed that crude leaf extracts of gamal from LU, PR, LB, and BL cultivars can kill papaya mealy bugs with the LC50-72 values of 0.033%, 0.090%, 0.184% and 1.818% respectively. The bioassay test of the fromulation showed a a mortality rate up 86.7%. Formula 1 is more effective than the other four formulas. Thus it can be concluded that the extract of gamal leaf water has the potential to be used as a natural insecticide.
Authors and Affiliations
Nismah Nukmal, Gina Dania Pratami, Emantis Rosa, Aprilia Sari, Mohammd Kanedi
Keywords
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- EP ID EP445306
- DOI 10.9790/2380-1201030408.
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