Mahanani Tri Asri, Evie Ratnasari, Winarsih
The objective of this study was to elucidate the biopesticidal effect on the relative pest abundance, leaf damage, and soybean yield (on dry weight basis). This study was conducted in 2 areas, Bedali soybean center, Lawang and Sumobito, Jombang, East Java, Indonesia. The study was conducted in 100 m2 soybean field having 600 plants in 5 treatment groups. Spodoptera litura Multicaspid Nuclear Polyhedrosis Virus, an entomopathogenic fungus (Lecanicillium lecanii), and Azadirachta indica (neem or mimba seed extract) were used in kaolin and ethyl p-methoxycinnamate in the ratio of 1:1:1:4:15%. The relative pest and predator populations were recorded and soyabean yield was determined. After treatment, total pests and predators found in the Bedali Lawang area were 269 and 548 compared to 390 and 456 in Sumobito-Jombang area. The damage to the soybean crop in the Bedali Lawang treated area was (42%) but more severe (63.08%) in Sumobito-Jombang area. The soybean yield in Bedali-Lawang and Sumobito-Jombang in treated area was 16.84 and 47.09 g/plant, which was significantly higher than recorded in controls (13.38 and 25.80 g/plant). © 2020. KRF.
Department of Biology, Faculty of Mathematics and Natural Sciences, State University of Surabaya, Surabaya, 60213, East Java, Indonesia
