Efficacy of Trichogramma chilonis (Ishii) (Hymenoptera: Trichogrammatidae) for Management of Sugarcane Stem Borer Chilo infuscatellus (Snell) in Different Varieties of Ratoon Sugarcane Crop

• Published in: Pakistan journal of zoology Vol. 46; no. 6
• Main Authors: Ahmad-Ur-Rahman Saljoqi Kamran Anwar Sadur-Rehman, Salim, Muhammad
• Format: Journal Article
• Language: English
• Published: Lahore AsiaNet Pakistan (Pvt) Ltd 01.12.2014
• Subjects: Chilo; Hymenoptera; Trichogramma chilonis; Trichogrammatidae
• ISSN: 0030-9923

The study evaluated Trichogramma chilonis (Ishii) as a potential biological control agent against sugarcane stem borer Chilo infuscatellus (Snellen) in different sugarcane varieties in ratoon crop. The aims were to study the effectiveness of inundative and inoculative field release methods of T. chilonis and varietal response against C. infuscatellus and yield of sugarcane ratoon crop. The experiment was laid out in Randomized Complete Block Design. The results showed that the infestation of C. infuscatellus in different sugarcane varieties started in April and continued till the end of the October. Inundative release method and variety CP77/400 was found most effective in reducing the percent infestation of sugarcane stem borer and increasing the yield of sugarcane. The data revealed that the percent infestation of C. infuscatellus of sugarcane was found highly significant in different varieties. Significantly lowest percent infestation of C. infuscatellus (3.45%) was recorded in variety CP-77/40. This was followed by variety SPSG-79 where the percent infestation of C. infuscatellus was 4.55. While significantly maximum percent infestation of C. infuscatellus of 5.31 was recorded in variety Mardan-92. The data further revealed that significant differences in the percent infestation of C. infuscatellus were observed in different plots treated with different release methods of T. chilonis. Significantly lowest percent infestation of C. infuscatellus of sugarcane 3.26% was recorded in different plots treated with inundative release method followed by plots treated with inoculative release method where 4.71% of C. infuscatellus were recorded. Maximum percent infestation of C. infuscatellus (5.34%) was recorded in the control. The data regarding the yield of sugarcane revealed that significantly highest yield was recorded in all varieties in the inundative release method as compared with the inoculative release method. Highest yield 68.70 tones ha-1 was recorded for CP-77/400 through inundative release method.