Additional host plants of curly top

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Introduction

In a recent paper,⁽⁹⁾ the host plants of curly top in the families Chenopodiaceae, Leguminosae, and Cucurbitacea were given. Forty varieties of economic plants were reported to be naturally infected with curly top and 120 varieties were experimentally infected with the disease. Eight different species of weeds were demonstrated to be naturally infected with curly top, and nineteen weeds and shrubs to be experimentally infected with the disease.

During 1925 several varieties of peppers failed owing to curly top in the interior regions of California.⁽⁶⁾ McKay⁽⁵⁾ reported as high as 90 per cent of the peppers affected with curly top at The Dalles, Oregon, during 1926. Crawford⁽³⁾ found a large percentage of Chili peppers affected with curly top in New Mexico during 1927.

According to Crawford† the experimental planting of tobacco (Nicotiana rustica) at the State College, New Mexico, was entirely destroyed by curly top. Tobacco was infected with the disease near Albuquerque. E. G. Beinharts also reported that tobacco was infected with curly top in Arizona.

During the 1925 outbreak of the beet leafhopper, horse-radish was demonstrated to be naturally infected with curly top in the Sacramento Valley.⁽⁶⁾ According to McKay,⁽⁵⁾ horse-radish was seriously infected with curly top in Oregon during 1926, and in some fields as high as 95 per cent of the crop was diseased.