. Bug vs. bug: nature's method of controlling injurious species. Insects; Insects, Injurious and beneficial. 20 CALIFORNIA STATE HORTICULTURAL COMMISSION. and does as good work as the Vedalia. The latter, however, was first introduced, and its reputation became so great that all others were over- shadowed by it. The Novius koehelei, hoAvever, has proved itself equally as prolific and quite as voracious a devourer of the cottony cushion scale as its companion. This ladybird is also an introduced species, having been sent from Australia for the State Board of Horticulture by Mr. Koebele on his s
. Bug vs. bug: nature's method of controlling injurious species. Insects; Insects, Injurious and beneficial. 20 CALIFORNIA STATE HORTICULTURAL COMMISSION. and does as good work as the Vedalia. The latter, however, was first introduced, and its reputation became so great that all others were over- shadowed by it. The Novius koehelei, hoAvever, has proved itself equally as prolific and quite as voracious a devourer of the cottony cushion scale as its companion. This ladybird is also an introduced species, having been sent from Australia for the State Board of Horticulture by Mr. Koebele on his second trip to that country. The illustrations give a good idea of this beautiful and active little ladybird. It feeds upon the cottony cushion scale {Icerya purchasi), searching out the solitary scales even better than the Vedalia. It passes through its different stages in about the same time as the FIG. 1. Xovius kot'bek'i, mak', enhirSLMl. FIG. 2. Novius koebelei, female, enlarged. Novius bellus (Beautiful ladybird). (Plate I, Fig. 8.) This is also an Australian species, having been introduced into California from that country by Mr. George Compere. It is one of the several coccinellid enemies of the cottony cushion scale, and has done very excellent work upon that pest. It has been generally distributed over the State. Vedalia sp. (Plate I, Fig. 2.) This is an unnamed species of Vedalia, from its color commonly known as the "Black ; It is also an Australian species, introduced by the State Board of Horticulture through Mr. George Compere, and is another of the coccinellids which prey upon the cottony cushion scale. Rhizobius ventpalis (Black ladybird). (Plate IV, Figs. 3, 3a, 86.) This is also an Australian ladybird, introduced by the State Board of Horticulture through Mr. Koebele, and is one of the natural enemies of the black scale {Saisseta [Lecanium] oleae). This ladybird was intro- duced for work on tlie black scale, and was generally distrib
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectinsects, bookyear1906
