The book The Bean Thrips Heliothrips of Fasciatus Pergande was written by author Harry Merwin Russell Here you can read free online of The Bean Thrips Heliothrips of Fasciatus Pergande book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is The Bean Thrips Heliothrips of Fasciatus Pergande a good or bad book?
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On March 27, 1911, cabbages in the laboratory yard were slightly infested. Where they had fed long the underside of the leaf was full of the silvery-white feeding marks of this insect and the tiny black specks of excrement. Cauli- flower suffers to the same extent as the less valuable cabbage. This insect has also been found feeding quite extensively on let- tuce, potato, and tomato. At Hollywood, Cal. , in February, 1911, it was very abundant on the foliage of pea vines, but the infestation di...d not appear to increase, probably because the vines were quite old. PEAR. Mr. S. W. Foster found pear foliage badly injured on August 31, 1909, at Martinez, Cal. He wrote: The foliage gave the appearance from a distance of having been scalded. Close examination showed that the leaves were often injured in large areas on either or both surfaces. The larvae, feeding only on these outer surfaces, soon cause the blackened areas. As the tree has made most of its growth for the season and the fruit crop has been harvested, it is hardly probable that this species will prove of serious consequence to the growers unless it should get so numerous as to appear in numbers early in the season.
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