. Bulletin of the Department of Agriculture. Agriculture. THE PEAE THRIPS IN CALIFOENIA. 27 following close behind. The increase in emergence during the season 1909 (fig. 12) and the tapering off in the same year was more gradual 300 275 1 2SO 225 f\ J \ 200 / } V / \ /7S / \ /50 . i f \ /2S J \ /OO y / 1 7^ / f \ SO -^ t-> / V -/ f V V V O / ^--. '^ '^^^/^^W^K^ .V .a .J. ^ ^ . ,, .. ^2^^^^^ya 20 22 2^ 2e 2e Fig. illustrating emergence of adult pear thrips at laboratory, Walnut Creek, Cal., 1909. (Original.) than during the season 1910 (fig. 13). This difference was most p
. Bulletin of the Department of Agriculture. Agriculture. THE PEAE THRIPS IN CALIFOENIA. 27 following close behind. The increase in emergence during the season 1909 (fig. 12) and the tapering off in the same year was more gradual 300 275 1 2SO 225 f\ J \ 200 / } V / \ /7S / \ /50 . i f \ /2S J \ /OO y / 1 7^ / f \ SO -^ t-> / V -/ f V V V O / ^--. '^ '^^^/^^W^K^ .V .a .J. ^ ^ . ,, .. ^2^^^^^ya 20 22 2^ 2e 2e Fig. illustrating emergence of adult pear thrips at laboratory, Walnut Creek, Cal., 1909. (Original.) than during the season 1910 (fig. 13). This difference was most probably mfluenced during the latter season by the /^ /6 /& 20 22 34 26 28 ^ ^ 6 G /O /2 /4 /e /& 20 22 24 26 28' Fig. showing emergence of pear thrips in cages under trees in held at Wahiut Creek, Cal., 1909. (Origmal.) OP EMERGENCE TO TEMPERATURE AND RAINFALL. The average mean temperature for February and March, 1911, or the two months when practicaUy aU of the thrips emerged, was. 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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