Biological Control of Myzus Persicae (Sulzer) By Release Coccinella Septempunctata L. On Strawberry Plants Under Glasshouse Conditions

Abstract

This study was carried out to evaluate the management of Myzus persicae (Sulzer) (Hemiptera: Aphididae) which infesting strawberry plants Fragaria ananassa (L.) by releasing different levels of the seven spotted lady beetle, Coccinella septempunctata L. (Coleoptera: Coccinellidae). This study was carried out under glasshouse conditions at two locations (Governorates), Nobariya (Behera governorate) and Perkash (Giza governorate) during season 2019/2020. The seven spotted lady beetle, C. septempunctata was released for one time at the beginning of February on strawberryplants at the two locations at rates of 30, 60 and 90 eggs/plant. In the first level of release (30 eggs/plant), at Behera Governorate the reduction percentages in the population of M. persicae increased gradually whereas it was 21.0, 31.0, 41.0, 44.0 and 50.0% in mid-February, first-March, mid-March, first-April and mid-April, respectively. The same trend was achieved at Giza Governorate. Also, in the second level of release (60 eggs/plant), at Behera Governorate the reduction percentages in the population of M. persicae increased gradually whereas it was 27.0, 33.0, 44.0, 48.0 and 55.0% in mid-February, first-March, mid-March, first-April and mid-April, respectively. The same trend was achieved at Giza Governorate. Lastly, at the third level of release (90 eggs/plant), at Behera Governorate the reduction percentages in the population of M. persicae increased gradually whereas it was 29.0, 37.0, 41.0, 49.0 and 52.0% in mid-February, first-March, mid-March, first-April and mid-April, respectively. In addition, the same trend was achieved at Giza Governorate.