Development stages of soybean varieties against pod sucking pest Riptortus linearis F. (Hemiptera: Alydidae) under two different cultivation technologies

Pod sucking pest, Riptortus linearis , is one of the important pests on soybeans which cause high yield losses. In order to reduce yield loss, information related to the development stages of resistant varieties and appropriate cultivation technology is needed. This study aimed to determine the relationship between the development stages of soybean varieties and cultivation technology on the population and intensity of pod sucking pests, R. linearis , attack and soybean yield. The study was conducted in a split plot design with two factors, namely cultivation technology [recommendation technology (TR) and existing technology (TE)], and soybean varieties: [Detap-1 (V1), Dega-1 (V2), Anjasmoro (V3), Biosoy (V4), and Dena-1 (V5)]. Each treatment combination was replicated three times resulting in 30 experimental plots. The results showed that soybean varieties affected the population and intensity of R. linearis . Development stages of soybean varieties that positively correlated with pest populations were plant height with a correlation coefficient value r =0.52, followed by pod trichome density ( r =0.12), and the number of pods attacked ( r =0.49). While the character that correlated with the intensity of pest attack was the density of trichomes ( r =0.20). Recommended cultivation technology can increase soybean productivity between 0.1 – 0.47 ton/ha compared to farmers’ existing technology.