. Circular. Insect pests; Insect pests. Fig. 2.—The alfalfa caterpillar ( Female in the adult or butterfly stage, larged. (Original.) eurytheme) : One-half en- ill the Valley Yuma culture reported the caterpillar infesting the lucern fields in Big- horn County, and in the year 1907 another correspondent re- ported it as a "cutworm," damaging the alfalfa at Hanford, Cal. This caterpillar is also known to have injured alfalfa in Utah. In 1909 Mr. C. N. Ainslie, of the Bureau of Entomology, found the eggs and larvae of this species on alfalfa at Springer, N. Mex., but do
. Circular. Insect pests; Insect pests. Fig. 2.—The alfalfa caterpillar ( Female in the adult or butterfly stage, larged. (Original.) eurytheme) : One-half en- ill the Valley Yuma culture reported the caterpillar infesting the lucern fields in Big- horn County, and in the year 1907 another correspondent re- ported it as a "cutworm," damaging the alfalfa at Hanford, Cal. This caterpillar is also known to have injured alfalfa in Utah. In 1909 Mr. C. N. Ainslie, of the Bureau of Entomology, found the eggs and larvae of this species on alfalfa at Springer, N. Mex., but doing no appar- ent damage. In the same year Mr. E. O. G. Kelly, also of the Bureau of Entomol- ogy, found the larvae feeding on alfalfa at AVellington, Kans. In Arizona, Salt Kiver and in the Valley, farmers say that on an average about one year in ever}' three or four the " worms " become sufficiently numerous to cause considerable damage. In the Sacramento Valley, and in the irrigated alfalfa regions of south-central California, according to Mr. W. E. Packard, of the California Agricultural Experiment Station, the butterflies are quite numerous during certain years and cause more or less damage. However, not until alfalfa began to be widely grown in the newly irrigated region in the Imperial Valley of southern California did the butterfly assume such pro- portions, and appear with such regularity each season, as to become a dread to the farmers, particularly to those confining their efforts wholly to alfalfa gi'owing. It was in 1909, after a season when the larvae had taken all of one crop of hay, causing a loss of hundreds of dollars on his 320-acre ranch, as well as a similar loss to dozens of other ranchers in the valley, that Mr. J. A. AYalton, of the Imperial Valley, wrote the United States Department of Agi'iculture asking for a remedy or a [Cir. 133]. Fig. 3.—The alfalfa caterpillar (Eurymus eurytheme) : Male in the adult or butterfly stage. One-half enlar
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectinsectp, bookyear1904
