Dispersal of the pea leaf miner Liriomyza huidobrensis (Blanchard, 1926) (Diptera: Agromyzidae): a field experiment

FENOGLIO MARÍA SILVINA; VIDELA MARTIN; SALVO ADRIANA; JUAN MANUEL MORALES

REVISTA DE LA FACULTAD DE CIENCIAS AGRARIAS DE LA UNIVERSIDAD NACIONAL DE CUYO

UNIV NACIONAL CUYO

Lugar: Mendoza; Año: 2018

0370-4661

AbstractMovement of herbivore insects within agroecosystems can ultimately determine the level ofdamage to crops. We experimentally assessed the dispersal of Liriomyza huidobrensis (Blanchard,1926) (Diptera: Agromyzidae) under field conditions. In addition, we evaluated if body size wasrelated to dispersal distance. Eight hundred individuals of L. huidobrensis were released in thecentral point of a series of concentric circles (6, 12, 24, 48, and 96 m in radius), where 117 yellowsticky traps were set to recapture the insects. Circular Statistics were used to evaluate flightdirection whereas hurdle models were used to analyze dispersal probability in relation to distance.Five percent of the released individuals were recaptured in the traps, being 36m the mediandistance of recapture. The distribution of recaptured insects was not random around the differentcircles, but the preferential dispersal direction was not explained by wind direction. The incidenceof recaptured L. huidobrensis of both sexes significantly decreased at increasing the distances fromthe release point, but decayed faster for females. We did not find an effect of body size on dispersaldistance of recapture. Our results suggest that the pea leaf miner dispersed actively andpreponderantly mainly to over short distances, but events of longer flights may also occur,especially in for males.