. Bug vs. bug: nature's method of controlling injurious species. Insects; Beneficial insects; Insect pests. FIG. 7. Hippodamia ambigua, enlarged. Hippodamia ambigua, pupa. FIG. 9. Hippodamia ambigua, larva. HYMENOPTERA. Seutellista eyanea, Motsch. (Plate IV, Figs. 1, la, 16, lc.) This is comparatively a new introduction into our State, having been secured from South Africa, where it was found to be a very effective worker on the black scale (Saisseta oleae). In the short time it has been estab- lished among us, it has done most remarkable work, and, so far, promises to be as efficient a check
. Bug vs. bug: nature's method of controlling injurious species. Insects; Beneficial insects; Insect pests. FIG. 7. Hippodamia ambigua, enlarged. Hippodamia ambigua, pupa. FIG. 9. Hippodamia ambigua, larva. HYMENOPTERA. Seutellista eyanea, Motsch. (Plate IV, Figs. 1, la, 16, lc.) This is comparatively a new introduction into our State, having been secured from South Africa, where it was found to be a very effective worker on the black scale (Saisseta oleae). In the short time it has been estab- lished among us, it has done most remarkable work, and, so far, promises to be as efficient a check for the black scale as the Vedalia has been on the cottony cushion scale. Of its introduction, Mr. Craw writes: It was not until Prof. Charles P. Lounsbury, Government Entomologist of Cape Colony, called attention to the Seutellista eyanea as an efficient enemy of the black scale in that country, that its true value was recognized. Through the efforts of the Hon. S. F. Leib, of San Jose, and Mr. Ed. M. Ehrhorn, of Mountain View, Senator Perkins appealed to the United States Department of Agriculture to use its good offices toward securing this valuable insect. Several colonies were forwarded to Mr. Ehrhorn. but, unfortunately, without any practical results from either sending. On October 1, 1901, Professor Lounsbury wrote me: "By to-morrow's boat we start you two boxes containing cuttings of oleander bearing parasitized scale. It is not ideal material by any means, and this is not the season we most wish to send in, but the scale and its parasites are both so scarce that we must send what we find as soon as we find it. Most of the scale in your. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Isaac, John; California. State Commission of Horticulture. Sacramento, W. W. Shannon, Supt. State Printing
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectinsects, bookyear1906
