. Bulletin of the Department of Agriculture. Agriculture. THE BLACKHEAD FIRE WORM OF CRANBERRY. 21 cocoon in the lower row of specimens in fi<^ure 11. The specimens in the top row have been dissected from tlie loosely constructed cocoons and show the fungous disease growing on the pupse. While tliis disease certainly causes the death of a large number of pupse on bogs where it is prevalent, not too much reliance should be placed on it in the control of the firew^orm, since the greatest part of the damage by the fireworm is done to the vines before the time when the fungous disease is g
. Bulletin of the Department of Agriculture. Agriculture. THE BLACKHEAD FIRE WORM OF CRANBERRY. 21 cocoon in the lower row of specimens in fi<^ure 11. The specimens in the top row have been dissected from tlie loosely constructed cocoons and show the fungous disease growing on the pupse. While tliis disease certainly causes the death of a large number of pupse on bogs where it is prevalent, not too much reliance should be placed on it in the control of the firew^orm, since the greatest part of the damage by the fireworm is done to the vines before the time when the fungous disease is growing rapidly. The weather also may or may not be favorable to its rapid growth, and hence its killing power and spread are likely to vary considerably from one season to Fu;. 11. 1 uijyous iir, d Spiiaria, growing from the blackhead fireworm puiJik- iu ihfir cocoons. Slightly enlarged. PREDACIOUS ENEMIES. Spiders. On the cranberry bogs of the Pacific coast spiders of various kinds are found in very large numbers and doubtless devour many fire- Avorm larvie and moths. Insects. A large number of " ladybugs " are also seen on cranberr}^ bogs, and their presence there sometimes causes alarm to a grower who is not familiar with their habits. One species, the California red ladybird beetle,^" is very common, and both larvse and beetles can be seen actively walking over the tips of the cranberry uprights any 10 Specimen!^ determined by Mr. E. A. Schwarz, of the Bureau of Entomology, a9 Coccinella califoniica 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 United States. Dept. of Agriculture. [Washington, D. C. ?] : The Department : Supt. of Docs. , Govt. Print. Off.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectagriculture, bookyear
