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Field application of soil granular insecticides for the control of the cotton leafworm in egypt



Field application of soil granular insecticides for the control of the cotton leafworm in egypt



Acta Agronomica Academiae Scientiarum Hungaricae 26(1-2): 144-151



The first field trial in Egypt for controlling the cotton leafworm [Spodoptera, littoralis (Boisd.)] through soil application with granular insecticides is presented. The main advantages which encouraged such an approach are that it offers a way of eliminating the harmful effects of pesticides on both mammals and beneficial insects, such as prediators, parasites, honey bees and domestic animals. The experiment consisted of 19 treatments on cotton: 3 insecticides, 2 rates of application, 3 schedules and 1 untreated check, each replicated three times in a complete randomized block design. Insecticides formulated as granules of 5% chlorpyrifos, disulfoton and 10% Cyolane were applied as soil surface treatments. Each insecticide was investigated at 2 rates of kg actual toxicant/ha as follows: (1) chlorpyrifos at 1.19 and 1.79; (2) disulfoton at 2.98 and 3.57; (3) Cyolane at 0.95 and 1.19. Insecticides were applied twice for each treatment during the cotton growing season. The first application started on June 20, July 3 and July 16 for the 3 tested schedules, respectively. The second application for the same tested schedules was carried out at a uniform date on Aug. 3rd. Due to lack of Cyolane and disulfoton quantities, plots of moderate and late schedules were applied chlorpyrifos at rates of 23.81 and 35.71 kg in the 2nd application. All plots were irrigated uniformly as soon as granules were sown. Generally, based on the data presented here, applying granular insecticides as soil surface treatment appears to be promising as an alternative method for the control of the cotton leafworm.

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Accession: 005460141

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Related references

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