A monoclonal antibody was prepared by the hybridoma technology. It reacted only with the protein of Liriomyza trifolii (Burgess) and not with that of Chromatomyia horticola Goureau or Liriomyza sativae Blanchard in indirect enzyme-linked immunosorbent assay. It was effective even after being diluted more than 8.192×106-fold. The detection sensitivity of the antibody was 31.3 µg/ml under controlled conditions. Positive reaction was achieved with all laboratory-reared L. trifolii samples, including larvae, pupae, and adults. An indirect enzyme-linked immunosorbent assay system was successfully established to detect L. trifolii in the field. This antibody was successfully used to determine the L. trifolii collected in different locations, from different host plants, and in different seasons. More than 50% of leafminers collected on Brassica chinensis var chinensis, Apium graveolens (Miller) Persoon, Vigna unguiculata (L.)Walpers, Phaseolus vulgaris L., Lactuca sativa L., and Chrysanthemum coronarium (L.) Cassini ex Spach were L. trifolii, indicating that those six plant species might be the preference host plants of L. trifolii. Population of L. trifolii peaked in September, October, or November in Hangzhou, Zhejiang. These results suggest a great potential of using this McAb for precisely identifying L. trifolii and monitoring the population dynamics of L. trifolii in the field.
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Vol. 108 • No. 2