. Cooperative economic insect report. Beneficial insects; Insect pests. 270 Beet Leafhopper and Curly Top Conditions in the Southern Great Plains and Adjacent Areas, 19 57 Studies by Romney during the 1930's showed that the spring breeding areas of the beet leafhopper (Circulifer tenellus (Bak.)) east of Arizona and Utah were confined to southern New Mexico and southwestern Texas. Drought since 1951, with less than one-half normal rainfall in the western half of Texas and eastern New Mexico, has allowed the beet leafhopper to spread over this area and into western Oklahoma and western Kansas.
. Cooperative economic insect report. Beneficial insects; Insect pests. 270 Beet Leafhopper and Curly Top Conditions in the Southern Great Plains and Adjacent Areas, 19 57 Studies by Romney during the 1930's showed that the spring breeding areas of the beet leafhopper (Circulifer tenellus (Bak.)) east of Arizona and Utah were confined to southern New Mexico and southwestern Texas. Drought since 1951, with less than one-half normal rainfall in the western half of Texas and eastern New Mexico, has allowed the beet leafhopper to spread over this area and into western Oklahoma and western Kansas. Curly top, a virus disease transmitted by this insect, has been widely distributed over this area since 1953. Spinach growers in the Winter Garden area of Texas, flax growers in Bee and Live Oak Counties of Texas, and to- mato and sugar-beet growers in the remainder of the area have suffered the greatest losses. In order to gather more in- formation on this problem and to determine what might take place in 1957, a study was made in eastern Colorado and New Mexico and in western Texas. Oklahoma and Kansas during February and early March 1957. The map shows that adults of the leafhopper were found well distributed from the Rio Grande River east to the 98th meri- dian and north to the Arkansas River Valley of Colorado and Kansas, but the populations were very low. Nymphs and newly developed adults were found from the Big Bend area of Texas south to the tip, which shows that this insect had been breeding in that area during the winter. The only high con- centrations of leafhoppers were found near Pharr, Texas, in the extreme southern tip. In general, the population was one of the smallest found during the past 4-year I ° WERE FOUND. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Animal a
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