Efficacy of resistant varieties and the parasitoid Aphidius colemani (Hymenoptera:Aphidiidae) in integrated pest management (IPM) to Myzus persicae (Hemiptera: Aphididae) in Egyptian sugar beet fields

Abstract

This work was undertaken at the experimental farm of Sakha Agricultural Research Station during 2021/2022 and 2022/2023 seasons. For  investigating the role of resistant varieties and Aphidius colemani Viereck (Hymenoptera:Aphidiidae) parasitoid in Integrated Pest Management (IPM) of Myzus persicae (Sulzer) (Hemiptera: Aphididae) in sugar beet fields. Results indicate that significant difference  among the three varieties (LP17B4011, FD18B4018 and FD17B4010) in the numbers of aphid populations and infested plants with this  aphid throughout the two seasons LP17B4011 variety more resistant than FD18B4011 and FD17B4010 ones. Mean ±SE (Mean number of  aphids and infested plants) were 0.807±0.01 and 0.471± 0.0 to LP17B4011 and 1.425± 0.02 and 0.614± 0.03 to FD 18B4018. Also ,7.661±1.2  and 2.377± 1.01to FD17B4010 during 2021/2022.While, (0.330 ± 0.01 and 0.235± 0.02), (0.567± 0.01and 0.520± 0.01), (9.044± 2.11 and 2.710  ± 1.03) for the three cultivars, respectively in 2022/2023. In such concern, the parasitism efficiency of A. colemani against M. persicae on  the three varieties was 47.05 ,36.66 and 34.78 % to the three varieties, respectively in 2021/2022. Moreover, 57.14, 39.39 and 36.84 % for  three varieties respectively in 2022/2023. Consequently, planting the resistant variety + A. colmani parasitoids are very important and  efficient elements in IPM of M. persicae in sugar beet fields.