| Aculops lycopersici was found in America in 1892 firstly, and was reported in Guangxi, China in 1980. From then on, it was found in Shanghai, Henna and other provinces. In China there was few research on habits of Aculops lycopersici and on the physiological and biochemical responses of tomato for damage by Aculops lycopersici. In this paper, we studied the spatial distribution of the pest and the responses of the damaged tomato plants, in order to provide foundation for control of A. lycopersici and breeding of resistant plants.1 Observing of damaging symptoms and detection of spatial distributionDamaged tomato leaves turned yellow first between leafstalks and leaves, then, whole leaves became red brown, especially the nervation. Damaged stem appeared brown or russet. The number of A. lycopersici reaches peak in the first ten days of July, and decreased later, which were correlative with breeding conditions of A. lycopersici.2 Effects on morphology indexes of tomatoThere were three treatments, each with twenty tomato seedlings in the experiment. There were significantly difference among treatments after three weeks. Results showed that height, stem diameter, number of total leaves of damaged plants were all smaller than control.3 Effects on contents of chlorophyll, sugar, soluble protein, amino acid and free prolineContents of chla, chlb, chlorophyll, carotenoid and soluble sugar in damaged leaves decreased with the increase of infestation days and the pest densities. Reduced sugar... |
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