Effectiveness of Trichogramma chilonis (Ishii) against Sugarcane Stem Borer, Chilo infuscatellus (Snell) in Different Sugarcane Varieties

Abstract

These studies were conducted to find out the efficacy of different release methods of Trichogramma chilonis (Ishii) in different sugarcane varieties for the management of sugarcane stem borer, Chilo infuscatellus (Snell) in sugarcane plant crop. The results showed that the infestation of C. infuscatellus in different sugarcane varieties started in April and continued till the end of the October. Significantly lowest percent infestation of C. infuscatellus (1.76%) was recorded in variety CP-77/400 followed by SPSG-79 (2.80%). While significantly highest percent infestation (3.36%) of C. infuscatellus was recorded in variety Mardan-92. The data also showed significant differences in the different release methods of T. chilonis. Significantly lowest percent infestation (1.74%) of C. infuscatellus was recorded in different plots treated with inundative release method followed by plots treated with inoculative release method, where 2.68% infestation of C. infuscatellus was recorded. Maximum percent infestation of C. infuscatellus 3.50% was recorded in control. The data regarding the yield of sugarcane revealed that significantly highest yield, 89.38 tones ha^-1 was recorded in CP-77/400 through inundative release method. Overall, inundative release method and variety CP77/40 was found most effective in reducing the percent infestation of sugarcane stem borerand increasing the yield of sugarcane.