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595 > Image 595 of Annual report. 1921

Part of Kentucky Agricultural Experiment Station

1 il Q. = o , . . * 3- Czzculm N0. Ag 27 A the beetles thus secured. They are close at hand, ready to re- , sume active life and place their eggs when warm weather ar- f rives in spring. Early plantings compared with those made later in the spring at Bowling Green appear to show that those started early, and thus before the beetles wake up and place l their eggs, are less badly da.maged than others planted late in the spring. Plants taken up late in the spring may convey Y the beetles to new beds either as eggs, young grubs, or as T adults. gl 1 FOOD PLANTS AND THE SOURCES OF INFESTATION. As far as is known the erownborer attacks no other cul- tivated crop besides the strawberry. Doubtless originally it fed upon the wild strawberry of this country, since it is a native insect, and hence these plants should be destroyed on land before starting a bed there. lf it feeds upon any weed Z occurring about cultivated ground no one appears to have recorded it. The weeds most likely to harbor the insect are members of the same botanical family (Rosaceae) as the straw- berry. There are some of these growing on cultivated ground T at Bowling Green and elsewhere in the State. They are peren- V nial herbs, in some eases with a general resemblance to the t_ strawberry, a few of them even having a short underground i stem in which the crown borer might Gnd sufficient food to support it until it reached maturity. Of these native and in trodueed plants those most likely to harbor the pest are given ' below. `K ]. The Indian Strawberry (Duchesnea indica). This plant i bears a close resemblance to the cultivated strawberry both in its foliage and fruit. Its leaves are smaller, its flowers yellow, the small red fruit with a deceptive resemblance to that of the strawberry, but insipid. The plant multiplies rapidly in 1 cultivated ground and on lawns, by runners. It has been ob- served in \\'arren County, and is rather common locally about Lexington. The species is an introduction from Asia. i 2. Five-finger, (in