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EFEITO DO CONTROLE CULTURAL E QUíMICO SOBRE O áCARO DA NECROSE DO COQUEIRO, EM COCO-AN?O IRRIGADO

DOI: 10.1590/S0100-29452001000300026

Keywords: coconut, cocos nucifera, aceria guerreronis.

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Abstract:

one of the most harmful pests of coconut tree crop is the mite aceria guerreronis. this pest damage the coconut fruits in the first development stage, causing partial or total losses in fruit production. the objective of this work was to evaluate the effect of chemical products and crop management in the control of a. guerreronis, aiming to use them in a management program for this pest. the research was carried out in petrolina-pe from august to december, 1999. a complete randomized block design, with four treatments and four replications, was used. each replication consisted of two plants of green dwarf coconut tree variety. treatments were: a ? cleaned plants without chemical control; b ? cleaned plants with chemical control; c ? plants not cleaned and with chemical control; d ? plants not cleaned and without chemical control. all fruits damaged by mite were taken out from plants in the treatments with cleaned plants for three times. fenpyroxymate, tetradifon and adhesive, at the levels 200ml, 300ml and 15ml for 100 l water, respectively, were mixed and applied for three times. results showed that the individual uses of chemical products and crop management had efficiency of 26-87% and 64-89%, respectively, on mite control. however, the association of these two control managements showed a synergic effect on mite control with efficiency of 87-96%.

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