EFFECT OF DIFFERENT AGRO-ECOSYSTEMS ON ACTIVITY OF SOME PESTS INFESTING STRAWBERRY PLANTS IN EGYPT

Abstract

The survey of insect and mite pests recorded on strawberry plants revealed to two classes and five orders about seven insect pest species; (Myzus persicae, Bemisia tabaci, Empoasca decipiens, Franklienilla occidentalis, Thrips tabaci, Spodoptera littoralis, Pentodon bispinosus, belong to six insect families and one mite species (Tetranychus urticae) belong to Tetranychidae during two successive seasons 2018 and 2019 in the nursery and production land at Giza governorate. 1.2. The associated predators The survey of associated predators abundant strawberry plant revealed that, eight species; (Orius spp., Scolothrips sexmaculatus, Crysoperla carnea, Stethorus punctilllum, Coccinellaundecim punctata, Phytoseiulus persimilis, Neoseiulus californicus, Neoseiulus cucumeris) belong to five families of five orders during two successive seasons 2018 and 2019 in the nursery and production land at Giza governorate. 2. Effect of some ecological factors and its associated predators on population dynamics of pest infesting Festival cultivar of strawberry plants. 2.1. Frankliniella occidentalis 2.1.1. Population dynamics of Frankliniella occidentalis infesting Festival cultivar of strawberry plants There were no significant difference between population densities of F. occidentalis during two seasons 2018 & 2019 (106 and 102 thrips/10 leaves, respectively), whereas t value equal 0.04. In the first season 2018, the population of F. occidentalis gave two peaks on the 2nd week of July and 2nd week of August with total number 76 and 9 thrips/10leaves. While in the second season 2019, the population