Abstract
The population fluctuation of Bemisia tabaci (Genn.) studied on winter plantation of cucumber plant Cucumis sativus L. of 2018/2019& 2019/2020 seasons under greenhouse condition at Giza governorate, Egypt and, the insecticidal activities of two heavy nano metals (cu++ & mg++) and two commercial oils (camphor& Piper nigrum), its concentrations compared with recommended bio-insecticide (biofly) and recommended chemical insecticide (actara) were evaluated against B. tabaci (eggs & immature stages). The high infestation were in 2nd week of November and 2nd week of December with 428 eggs/10 leaves & 390 nymphs/10 leaves, respectively in season 2018 /2019, and recoded highly infestation in 2nd and 4th week of November with 390 eggs/10 leaves & 423 nymphs/10 leaves, respectively in the season 2019/2020. Camphor oil was the most effective with mortality percent 97.6% followed by Piper nigrum oil (93.6%) compared with chemical insecticide (actara).
Highlights
Cucumber, Cucumis sativus L. (Cucurbitaceous) is one of the most important vegetables, it is widely distributed all over the world
The population fluctuation of Bemisia tabaci (Genn.) studied on winter plantation of cucumber plant Cucumis sativus L. of 2018/2019& 2019/2020 seasons under greenhouse condition at Giza governorate, Egypt and, the insecticidal activities of two heavy nano metals and two commercial oils, its concentrations compared with recommended bio-insecticide and recommended chemical insecticide were evaluated against B. tabaci
In recent years the use of synthetic insecticides in crop protection programmers around the world has resulted in environmental hazards, pest resurgences, pest resistance to pesticides, and lethal effect to non-target organisms in the agro-ecosystems in addition to direct toxicity to users it was necessary to search for safe alternative materials for pest control, which can minimize the use of synthetic pesticides
Summary
Cucumis sativus L. (Cucurbitaceous) is one of the most important vegetables, it is widely distributed all over the world. The population fluctuation of Bemisia tabaci (Genn.) studied on winter plantation of cucumber plant Cucumis sativus L. of 2018/2019& 2019/2020 seasons under greenhouse condition at Giza governorate, Egypt and, the insecticidal activities of two heavy nano metals (cu++ & mg++) and two commercial oils (camphor& Piper nigrum), its concentrations compared with recommended bio-insecticide (biofly) and recommended chemical insecticide (actara) were evaluated against B. tabaci (eggs & immature stages).
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