Efficacy Test of Neem Leaf Extract from Merauke Against Mortality of Spodoptera litura Larvae
Bernadus Aprian Keo(a), Johana Anike Mendes(b)* , Jefri Sembiring(b), Maya Sari Rupang (b), Mani Yusuf (b), and Anwar (b)

(a,b) Agrotechnology Department, Musamus University, Merauke, South Papua

*joannamendes[at]unmus.ac.id

Abstract

Onion (Allium fistolusum L) is one of the horticultural commodities that has the potential to be developed. This commodity has a beneficial economic value because it is needed by the community as an additive to several types of food. Decreased onion production often occurs due to the availability of nutrients needed less than optimal, extreme weather and pest attacks. Damage due to pest attacks can cause damage up to 80% so it requires proper control. The recommended control is to use botanical insecticides from neem leaf extract. The purpose of the study was to test the efficacy of neem leaf extract from Merauke on the mortality of S. litura larvae. This research was conducted in laboratories and screen houses. The design used is RAL. The research procedure is to multiply S. litura in the laboratory, planting onion plants in the screen house, collecting neem leaves and extraction. The doses used is 23.8 gr wet / 500 ml water, 47.4 gr wet / 500 ml water, 95 gr wet / 500 ml water, 190 gr wet / 500 ml water, 380 gr wet / 500 ml water. The extracted solution before application is diluted by adding 1500 ml of water so that the volume of the solution becomes 2 liters. 10 larvae of S. litura instar 3 were used as test insects. The test method is that 10 test larvae are placed on onion plants, then left for 15 minutes and the extract is sprayed evenly on onion plants. Spraying was carried out 2 times, namely at the beginning and 48 JSP. The results showed the highest mortality percentage of S. litura larvae at a dose of 380 grams of material/2 liters of water of 42%, while the lowest mortality percentage was found at a dose of 23.8 grams of material/2 liters of water of 4%.

Keywords: neem leaves, S.litura, onion

Topic: Agricultural Production