. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 26 WHITE FLIES INJURIOUS TO CITRUS IN FLORIDA. or less extent. (See fig. 1.) The 17 counties referred to, arranged in order of the number of bearing citrus trees, is as follows: Orange, Lake, Volusia, Polk, Putnam, Brevard, Hillsboro, De Soto, Lee, Manatee, Dade, Marion, St. Lucie, Osceola, Sumter, St. John, and Alachua. Palm Beach as well as Dade and Monroe Counties are infested with the cloudy-winged white fly, as hereafter noted, but so far as known the citrus white fly does not occur there. In order of the pe
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 26 WHITE FLIES INJURIOUS TO CITRUS IN FLORIDA. or less extent. (See fig. 1.) The 17 counties referred to, arranged in order of the number of bearing citrus trees, is as follows: Orange, Lake, Volusia, Polk, Putnam, Brevard, Hillsboro, De Soto, Lee, Manatee, Dade, Marion, St. Lucie, Osceola, Sumter, St. John, and Alachua. Palm Beach as well as Dade and Monroe Counties are infested with the cloudy-winged white fly, as hereafter noted, but so far as known the citrus white fly does not occur there. In order of the percentage of groves infested the foregoing counties which are known to be infested would be arranged about in the following order, so far as our obser- vations and records show: Marion, Alachua, St. John, Manatee, Orange, Lee, Volusia, Polk, Putnam, Lake, Hillsboro, Sumter, De Soto, Osceola, and Brevard. If the groves infested by the cloudy- winged white-fly only were also taken into consideration, Hillsboro and Lake Counties would be transposed in the list, as would Osceola and Brevard, l)ut aside from this there would be no change. The arrange- ment is only approxi- mate, being based on observations made by the various men connected w4th the wdiite-fly investiga- tions upon informa- tion and samples of infested leaves re- ceived from corre- spondents and upon nearly 250 replies received in response to circular letters sent out in the spring of 1907. At the present time the writers estimate that througliout the State of Florida about 40 per cent of the citrus groves are infested by the citrus white fly, and that an additional 5 (or 10) per cent are infested by the cloudy-winged white fly alone. The citrus white fly occurs in nearly all the larger towns in north- ern Florida, infesting the various food plants which are grown as ornamentals as well as the citrus fruit trees which are grown to a limited extent. The insect is of common occurrence, principally on Cliina trees, cape
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