Armadilhas luminosas não funcionam para o mosquito da dengue e são antiecológicas 
Autor: Sirlei Antunes Morais | Publicado: 2016-06-15T22:57:00-03:00

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O que acontece no corpinho

Ao longo da evolução os mosquitos desenvolveram um
determinado comportamento e uma sensibilidade tal que permite a eles o direcionamento até as fontes de
alimento ou a alguns alvos específicos a fim de realizarem as suas atividades
fisiológicas e ecológicas. Essas fontes podem ser o néctar que corre no sistema
venoso das plantas ou o sangue de animais, incluindo o homem. Os mosquitos
também são atraídos para fontes de água para alimentação ou para pôr ovos no
caso das fêmeas. Nas antenas e no aparelho bucal dos mosquitos têm receptores
que reconhecem determinados sinais emitidos por cada um desses alvos. Esses sinalizadores podem ser hormônios, voláteis de substâncias açucaradas, gases emitidos ou partículas
de calor.



As armadilhas com luz 

No caso das armadilhas luminosas o principal atrativo é uma luz branca ou
de determinada cor como o azul chamado de luz escura ou raios de luz de
diferentes comprimentos de ondas como o ultravioleta. Esse tipo de atração é
válido para alguns insetos de comportamento oportunista, mas não para mosquitos
que têm a sinalização dos seus alvos de modo peculiar e variado.&nbsp;






A questão da ecologia&nbsp;
Por isso, as armadilhas luminosas não são tão atrativas para
mosquitos, mas atraem e sacrificam uma variedade de insetos importantes ecologicamente.
Pois muitos deles são predadores e polinizadores e também servem de presa
para uma variedade de aves, anfíbios e peixes.



Coisas de mosquitos&nbsp; 
Os mosquitos têm olhos compostos e se direcionam melhor para locais com
pouca ou nenhuma luz, pois alvos muito reflexivos confundem a sua visão. É claro que os alvos coloridos facilitam a sua visão e direção, pois emitem espectros
de luz seletivos e comprimentos de ondas mais estreitos, sem muita refletividade. Contudo,
isso não significa que os mosquitos sejam atraídos para fontes de luz coloridas como o
azul, amarelo ou verde, uma vez que eles se direcionam para um
determinado alvo por uma série inimaginável de outros fatores.