Part of the NATO ASI Series book series (NSSA, volume 276)
Identification of Western Flower Thrips
Western flower thrips (WFT) is distinguished from other Frankliniella species by the shape of antennal segment III, the size of the pronotal anteroangular setae, the position of the ocelli and interocellar setae, and the complete comb of posteromarginal setae on tergum VIII. The position of the interocellar setae, which arise from just inside the triangle formed by lines connecting the outside edge of the three ocelli, is critical because it is used to combine species into working groups within the genus. The distance between the posterior ocelli is more than twice their diameter. The base of antennal segment III is without a sharp angulation and the pronotal anteroangular setae are almost as long as the anteromarginal setae. These characteristics were documented with scanning electron micrographs (SEM).
© Springer Science+Business Media New York 1995