ABSTRACT
The present work was aimed at evaluating the efficacy of insecticides on the control of whitefly in chrysanthemum plants cultivated in plastic pots under greenhouse conditions. The experiment was carried aut in Marília, SP, Brazil. The treatments and doses (g a.i./100 L of water) were: thiacloprid 480 SC (9,6), spiromesifen 240 SC (9.6; 12 and 14.4) and betacyflutrin 50 CE (0.5), which were applied at weekly intervals four times. The equivalent spray volume was 1,000 L.ha-1. The chrysanthemum infestation was induced through the use of whitefly-infested tomato plants closed to the experiment. One day after spraying, the number of alive adult insects was counted in seven plants per plot and three leaves per plant. The insecticides thiacloprid, spiromesifen and betacyflutrin were efficient in the control of the whitefly, being significantly different from the control treatment.
KEY WORDS:
Thiacloprid; spiromesifen; betacyflutrin; Bemisia argentifolii; chrysanthemum.
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