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on potatoes in most parts of Davis County. Some fields are 
almost completely destroyed at the present time by psyllid 
yellows, while others run from 5'" to 100 per cent diseased. 
The first generation is nearly completed, and adult psyllids 
are "becoming very abundant. » 
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Wisconsin 
CABBAGE 
IMPORTED CABBAGE WORM ( Pieris rapae L.) 
J. J. Davis (July 25): The cabbage worm was abundant at 
Monterey, French Lick, and Lafayette July 3-17. 
E. L. Chambers (July 18): Serious losses of cabbage and 
cauliflower are being reported throughout the State this 
summe r . 
L. Haseman (July 26): The imported cabbage worm was scarce 
until about July 15 and since then worms and adults were very 
abundant at Columbia. ■ • 
M. H. t Swenk (July 1-15) : Beginning early in July the 
iraportqp. cabbage worm was frequently complained of as doing 
injury to cabbage in various parts of the State. (July 18): 
The imported cabbage worm is moderately abundant over the 
entire State. 
G. F. Knowlton (July 16): Cabbage worms are seriously 
damaging some cabbage patches. 
SOUTHERN CABBAGE WORM ( Pieris protodice B. & L.) 
F. L. Thomas (July 17): Very abundant on collards in a 
summer garden at College Station in July. 
DIAMOND-BACK MOTH ( Plutella maculipennis Curt.) 
W. W. Baker (July 17): Several reports have been received 
of rather heavy damage by this pest to cabbage fields near 
Kent. Cabbage, kale, and turnips are heavily infested at 
Grand Mound, One small patch of cabbage was dusted with 
barium fluosilicate and a good kill obtained. 
CABBAGE APHID ( Brevicoryne brassicae L.) 
J. J. Davis (July 25): The cabbage aphid is abundant at 
New Carlisle July 4. 
E. L. Chambers (July 18): Many requests for control are 
being received from LaCrosse, Outagamie, and Winnebago Counties. 
