CHEMICAL CONTROL OF THE CITRUS SNOW SCALE Unaspis citri (COMSTOCK, 1883) (HOMOPTERA, DIASPIDIDAE)
Abstract
This research was carried out at Taquari Experiment Station, to study the insecticide action of various pesticides against the citrus snow scale, in a 'Valencia' orange orchard. The treatments and quantities of active ingredient, in grams per plant, were: flufenoxuron 0.375, flufenoxuron 0.375 plus mineral oil 40.0, teflubenzuron 0.375, teflubenzuron 0.375 plus mineral oil 40.0, mineral oil 40.0, malathion 0.75 plus mineral oil 40.0, buprofezin 1.25, buprofezin 2.50, buprofezin 1.25 plus mineral oil 37.8, mineral oil 37.8 malathion 0.75, plus mineral oil 37.8, malathion 0.75, and check. The estimate of the population was made 18 and 56 days after the pulverization of the products. On each plant, two arcas of 10 cm' were marked on the infested stems and branches, one day before spraying. From the results obtained, the more .efficient products were malathion plus mineral oil, buprofezin plus mineral oil and malathion.
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