CONTROL OF RHIZOME ROT OF GINGER THROUGH SELECTED CHEMICALS, BIOAGENT, PLANT EXTRACTS AND SOIL AMENDMENT

Abstract

An experiment was conducted in the field laboratory of Sher-e Bangla Agricultural University, Dhaka, Bangladesh during the period from April 2006 to December 2006. Data on disease incidence and disease severity was recorded at 90, 105, 120, 135, 150 and 165 Days After Sowing (DAS) DAS with 15 days intervals and analyzed. The highest performances were observed in case of application of Trichoderma harzianum, garlic extract and neem extract in all recording days in controlling the disease. At 90 DAS, the lowest disease incidence (hill infected) recorded at 90, 105, 120, 135, 150 and 165 DAS respectively were 6.67 %, 33.33%, 33.33%, 20.00%, 13.33% and 13.33% in case of Trichoderma harzianum where it was 66.67%, 93.33, 100 %, 100%, 100% and 100%, respectively in control. Similarly the lowest disease severity (0.20, 0.80, 0.28, 0.05, 0.04 and 0.04) was recorded at 90, 105, 120, 135, 150 and 165 DAS in case of Trichoderma harzianum where it was 6.82, 20.51, 18.39, 21.97, 30.12 and 28.65, respectively in control. The promising performances were also observed in case of garlic extract and neem extract. The highest yield was recorded in case of Trichoderma harzianum (11.67 t /h) followed by garlic extract (6.33 t/h) and neem extract (6.11 t/h). The lowest yield was recorded in control (2.78 t/h) preceded by Folicur (3.65 t/h).