Resumo

CERMELI, M.; MONTAGNE, A.; CASTRO, R.  e  ROMERO, R.. Chemical control of Thrips palmi Karny (Thysanoptera, Thripidae) on field beans (Phaseolus vulgaris L.) II.. Rev. Fac. Agron. [online]. 2002, vol.19, n.1, pp.1-8. ISSN 0378-7818.

A new field trial for the control of Thrips palmi Karny on field beans was held at Santa Cruz, State of Aragua in March 1993. Products, formulations and dosages used were: avermectina (Vertimec 1.8 EC) 1 L/ha, cartap (Padan 50% SP) 2 kg/ha, diflubenzuron + paraffinic oil (Dimilin 25% WP + SafTSide 80%) 1 kg/ha + 7 L/ha, fenobcarb (Osbac 50% EC) 1.5 L/ha, flufenoxuron (Cascade 100 EC) 1 L/ha, imidacloprid (Confidor 350 SC) 0.75 L/ha, isazofos (Miral 500 SC) 2 L/ha, pyriproxyfen (Admiral 10% EC) 1 lL/ha and propetanphos (Blotic 35% EC) 1 L/ha. A total of four applications and five evaluatios were performed, one previous to treatment and again seven days after each application. In nymph control, the most effective treatments were imidacloprid, 85.97%. avermectin 74.74%, pyropoxifen 69.57 %, cartap 57.16%, flufenoxuron 51.36%, diflubenzuron + oil 24.70%.. Fenobcarb, isazofos and propetanphos gave higher population percentages than control in adults but with less efficiency. Similar results were observed in the control of adults but with a lower efficacy, avermectin 50.21%, pyriproxyfen 45.05%, flufenoxuron 24.45%, cartap 22.73% and imidacloprid 8.59%. Diflubenzuron + oil 2.612%. , Fenobcarb, isazofos and propetanphos gave higher populations than the control group.

Palavras-chave : Thrips palmi; chemical control; Phaseolus vulgaris.