. Bulletin of the Department of Agriculture. Agriculture. 20 BULLETIN 1032, U. S. DEPARTMENT OF AGEICULTURE, Because of the overlapping of the generations, one can scarcely do more than speculate as to the date of occurrence of the stages of the second and third generations on the bogs; and the latest dates of the occurrence, particularly of the moths of the first generation and all the stages of the second and third generations, could only be obtained, therefore, by rearing methods. NATURAL ENEMIES. PARASITES. Insects. Although numerous very small wasplike insects (members of the order H
. Bulletin of the Department of Agriculture. Agriculture. 20 BULLETIN 1032, U. S. DEPARTMENT OF AGEICULTURE, Because of the overlapping of the generations, one can scarcely do more than speculate as to the date of occurrence of the stages of the second and third generations on the bogs; and the latest dates of the occurrence, particularly of the moths of the first generation and all the stages of the second and third generations, could only be obtained, therefore, by rearing methods. NATURAL ENEMIES. PARASITES. Insects. Although numerous very small wasplike insects (members of the order Hymenoptera) can be seen flying over the tops of the vines on. ^uLf/s ^ ^c/iyi7 ^c/ly/s ^oiy/g mI?So ^clyai Fig. 10.âEgg deposition by blackhead fireworm moths of the first generation. Records every three hours from July 15 to 20; Sea view, Wash., 1918. badly infested bogs on warm, clear days, none of these could be reared from collections of the eggs and larvae of Rhopobota naevana from ^'arious bogs. Circumstances indicate very strongly, however, that the blackhead fireworm on the Pacific coast is parasitized, to a certain ex- tent at least, although not as much as on some dry cranberry bogs in the East. Fungous Disease of the From about the beginning or middle of August it is very common to find, especially on the older and more badly infested cranberry bogs, areas of 3 to 5 inches or more in diameter of old leaves beneath the vines which have the appearance of being smeared with a floury- wdiite substance. Closer examination of these areas will show that this whitish appearance is due to the fruiting growth of a para- sitic fungus,® which attacks and kills the pupse concealed in their cocoons in these old leaves. This fungus is showm growing from the â ' Determined by Dr. A. T. Speare, of the Bureau of Entomology, as a species of Please note that these images are extracted from scanned page images that may have been digitally enhanced for readabi
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