Yield Loss Assessment and Determination of Control Thresholds for Anthracnose on Red Pepper

This study was carried out to develop control thresholds for anthracnose on red pepper. To investigate relationship between anthracnose incidence and diseased fruits, experimental plots with six treatments were established. There existed close correlation between rate of diseased fruits and yields in field (Y = -16.83X + 327.57, R² = 0.83), in rain shelter (Y = -4.92X + 361.02, R² = 0.84), and in rain shelter with rain (Y = -5.91X + 359.71, R² = 0.76). Control thresholds for anthracnose of pepper were 0.9% diseased fruits per plant in field and from 1.7 to 2.3% diseased fruits rate per plant in rain shelter.