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the San Joaquin Valley injured "by the alfalfa weevil and this would 
not he classed as economic damage. The average number of larvae 
collected per 100 sweeps of an insect net in this field exceed 3,000. 
The highest larval populations in other fields wore seldom more than 
500 and in many fields the count did not exceed 100 per 100 sweeps of 
a net. The highest average larval count per 100 sweeps was 89 at 
Pleasanton on April 17, and on the same day in the San Francisco Bay 
area larval counts in fields not cut were from 49 to U76 per 100 
sweeps. Parasitization of large larvae "by Bathyplectos in different 
fields in San Joaquin Valley on April 8 ranged from 14 to 76:pcrcent. 
At Pleasanton 96 percent of the large larvae were parasitized on 
April 6. In the San Francisco Bay, area parasitization ranged from 
87 to 91 percent. 
PEA APHID ( Illinoia pisi Kith.) 
New Jersey. J. B. Schmitt (March): This aphid was found reproducing on 
alfalfa the 1'aSt week in March and is still reproducing. 
Delaware. L. A. Stearns (April 23): Because of the unusually early season, 
pea aphids are appearing in considerahlo abundance in Sussex Coi.inty. 
Virginia. H. 0. Walker and L. D. Anderson (April 2b): Many alfalfa fields 
are rather heavily infested. Although they arc not nearly as abun- 
dant as last year, these aphids arc present in many of the pea fields. 
Indications arc that most of the garden peas in Norfolk and Princess 
. Anne Counties will escape serious injury. However, a few of the pea 
fields on the Eastern Shore of Virginia arc becoming rather heavily 
infested and at least two of the larger canners have started control 
operations. 
Louisiana. C. 0. Eddy (April): Thdse insects appear in small numbers in 
southern Louisiana but arc abundant in the northern part of .the State. 
Kentucky. W. A. Price (April 27): The aphid is abundant on alfalfa at 
Princeton and Henderson in western Kentucky. .... 
Wisconsin. J. E. Dudley, Jr. (April 19): The first aphid, .an adult stem- 
mother, was found near Madison on April k. This' aphid must have hatch- 
ed the first of April or before. Alfalfa was looked over twice weekly 
since the middle of March but eggs were very scarce last fall* 
Kansas. H. R. Bryson (April 25): Some pea aphids arc present in the 
State but are not causing damage. 
Utah. G. P. Knowlton (April 3): First-, second-, and third-instar aphids 
and eggs were found in a gravelly, west-sloping alfalfa field at Mill 
Creek, in Salt Lake County. (April 21): A mature stem-mother, and 
first- to fourth- instar nymphs of the second generation, some with 
well-developed wing pads, were found on alfalfa and sweetclover at 
Willard, Ogden, and near Provo. (April 25) : A few winged and mature 
second-generation apterous pea aphids arc now present on alfalfa. In the 
Payson-Benjamin area of Utah County these insects arc parti cularly 
abundant for this early in the season. 
