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Submitted in Partial Fulfillment of the Requirements for the Degree of DOCTOR OF PHILOSOPHY In Agricultural Sciences
| Content Provider | Semantic Scholar |
|---|---|
| Author | Taha, G. Z. |
| Copyright Year | 2015 |
| Abstract | This study was conducted to evaluate the performance of spinosad (Tracer 24SC®) and its efficacy on acridid pests (desert locust, Schistocerca gregaria and several species of grasshoppers) in comparison with both conventional pesticides, chlorpyrifos and malathion in the laboratory on one side and with chlorpyrifos under the field conditions on the other side. Also, to evaluate efficacy of the fungus, Metarhizium anisopliae var. acridum (Green Muscle®) on the target pests under the egyptian environmental conditions at different periods in some places in Egypt which considered favorable breeding sites. Also, laboratory trails were carried out, to test the effect of spinosad combined with M. anisopliae var. acridum spores on their viability. It could be concluded from the present study that, spinosad proved as a successful agent to control both locust and grasshoppers under the egyptian conditions. At concentration of 65ml/100L water spinosad caused 75% mortality among S. gregaria after 24hr that reached 100% after 48hr., while chlorpyrifos caused 85% and 100% mortality after 24 and 48 hr., respectively. When it was applied against common grasshoppers at concentration of 50ml/100L water, it caused 83.3% and 100% mortality after 24 and 48hr., respectively; meanwhile chlorpyrifos caused 85% and 100% after the same periods, respectively. The fungus M. anisopliae var. acridum showed promising results for locust and grasshoppers control. A dose of 50g/ha. fungus diluted in diesel resulted in an optimal mortality of locusts and grasshoppers in the cages during 21 days, followed by 50g/ha. dose diluted in vegetable oil. The combined application of spinosad at sublethal doses with M. anisopliae var. acridum demonstrated novel tool to control locust and grasshopper in Egypt, where spinosad could overcome the delay in action of the fungus providing reasonable rapid action, also the combined application reduces the cost of control operation. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://www.cu.edu.eg/data_journals/2/articles/2727/submission/copyedit/2727-5341-1-CE.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
