Laboratory evaluation of the effects of triflumuron on the development of Rhodnius prolixus nymph

Memórias do Instituto Oswaldo Cruz

Cb Mello¹  D Mendonça-lopes¹  D Feder¹  Cd Uzeda¹  Rm Carneiro¹  Ma Rocha¹  Ms Gonzalez¹ 

[1] ,Universidade Federal Fluminense Instituto de Biologia Departamento de Biologia GeralNiterói RJ ,Brasil

关键词: Rhodnius prolixus;    triflumuron;    benzoylphenylurea;    chitin synthesis inhibitor;   

DOI  :  10.1590/S0074-02762008000800017

来源: SciELO

【 摘 要 】

Studies were carried out to evaluate the efficacy of the growth regulator, triflumuron (TFM) (Starycide® sc 480 Bayer), for disrupting the development of Rhodnius prolixus fifth-instar nymph by oral, topical or continuous treatment. All treatments were able to induce high levels of mortality, delay development and molt inhibition. Oral treatment induced molt inhibition in all insects that survived at doses of 0.25, 0.50 and 5.0 mg/mL of a blood meal. The highest levels of both mortality in 24 h and molt inhibition were always observed after topical treatment. The lowest doses needed to obtain considerable biological effects were always observed after continuous treatment. In this way, the highest levels of mortality within 30 days were detected after continuous treatment, which also induced an extended inter-molting period, a lower number of over-aged nymphs and the highest level of molting in nymphs that survived. Moreover, the effects of TFM on insects were often displayed in a dose response manner. These results indicate that TFM acts as a potent growth inhibitor of R. prolixus nymphs and has the potential to be used in integrated vector control programs against hematophagous triatomine species.

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