FIELD EVALUATION OF FIVE WHEAT VARIETES AGAINST INSECT PEST INFESTATION

Abstract

The experiment was conducted to evaluate the infestation status of insect pest on different wheat variety. Five wheat variety (BARI GOM -24, BARI GOM-25, BARI GOM-27, BARI GOM-28and BARI GOM-29) were used as a test crop to conduct the study. The experiment was laid out in Randomized Complete Block Design with three replications. Total 5 insect pests were found from this experiment among wheat aphid and wireworm as major and leaf hopper, grass hopper and cereal leaf beetle as minor insect of wheat. The highest insect pest was found in grain filling stage and lowest was found in panicle initiation stage. In grain filling stage, the lowest number of aphid (6.26) was recorded from BARI GOM-29 and the highest number of wheat aphid (9.11) was found in BARI GOM-24. Effect of different varieties of plant height, filled grain, unfilled grain, weight of 1000 grain and yield showed significant. The highest yield (3.56 tha-1 ) was recorded in BARI GOM-29 and the lowest yield 2.29 tha-1 was recorded in BARI GOM-25. The highest percentage of infested spike hill-1 was recorded in BARI GOM-27 and lowest was found in BARI GOM-29. The lowest yield loss (31.53%) was recorded in BARI GOM-29. This is might be due to physical resistance of the varieties. BARI GOM-29 recommended to wheat growers as it is found the most resistant/tolerant wheat cultivar against wheat insect pest with maximum grain yield as compared to other cultivars.