. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 22 LETTS -<»il to the depth f l inch. Mmi\ f the larva effected pen< within one after being placed n the grabs, hut ordinarily the vials were Bel aside for _' i hours to insure â maximum parasi( In 1922 porous-clay blocks were substituted for the ri. |L Fig. 19.âReproductive organs of Protena ffarita: A, condition before mating; B. aft* r zation, showing eggs and larvae in the distended egg sac these blocks bearing upwards of 100 cells i >f a size suitable to aca immi - date the grubs used. These blocks w
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 22 LETTS -<»il to the depth f l inch. Mmi\ f the larva effected pen< within one after being placed n the grabs, hut ordinarily the vials were Bel aside for _' i hours to insure â maximum parasi( In 1922 porous-clay blocks were substituted for the ri. |L Fig. 19.âReproductive organs of Protena ffarita: A, condition before mating; B. aft* r zation, showing eggs and larvae in the distended egg sac these blocks bearing upwards of 100 cells i >f a size suitable to aca immi - date the grubs used. These blocks were more satisfactory in <â . way and resulted in a considerable savin*: in time. With this method it was possible for one person to inoculate more than 1,00 per day. provided a sufficient number of flies were 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 Dept. : Supt. of Docs. , G. P. O.
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Keywords: ., bookauth, bookcentury1900, bookdecade1910, booksubjectagriculture
