INSECTS PESTS BEHAVIOR TO INSECTICIDE APPLICATION IN TWO MELON CULTIVARS IN THE AZUERO REGION, PANAMA. 1996
A trial was carried out in order to measure the insecticide effectiveness in the control of the most important pests in melon (Cucumis melo). Ten treatments were evaluated in a Completely Randomized Block design, with three replications. Eight treatments were evaluated with a Hi-Mark and two treatments with Honey Dew Green Flesh cultivar. The evaluated insecticides were: endosulfan, abamectin, fenitrothion, Bacillus thuringiensis, Neem seeds extract and two dosages of pimetrozin (all treatment with Hi-mark cultivar). The trial included a tester plot without insecticide application in both cultivars. When the cultivars tolerance for the aphid attack was assessed, the outcomes indicated the Honey Dew was the most affected cultivar by the pest; in addition, Hi-Mark hybrid is a cultivar with a high aphids population tolerance. When the yields of tester plots (without insecticide application) were matched up, the Hi-Mark plot improved in 15.1 t/ha to Honey Dew plot. The yield decreased in Honey Dew, by the aphid attack, was 91.1%, whereas, the yield reduction in Hi-Mark represented 32.5%, when these were compared with insecticides protected plots (endosulfan). Endosulfan and pimetrozin, at the evaluated dosages, were the more efficient in the aphid control. Fenitrothion, Neem seed extract and abamectin, followed this group in effectiveness for the aphid control. During the trial advance, the white fly population was very low (lesser than one white fly/leaf). The treatments containing endosulfan were better in control of fruit worm (lesser than 15% of damage fruit, at the harvest moment). The highest yields were obtained with treatments in base of endosulfan, abamectin and pimetrozin, while the lowest were founded in the tester plots of Honey Dew without insecticide application.
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| Format: | Digital revista |
| Language: | spa |
| Published: |
Instituto de Innovación Agropecuaria de Panamá
2002
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| Online Access: | http://www.revistacienciaagropecuaria.ac.pa/index.php/ciencia-agropecuaria/article/view/341 |
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