Agallia quadripunctata (Provancher)Membracoidea : Cicadellidae
|Diseases Transmitted||Pathogen Type|
|Crops Affected by Agallia quadripunctata (Provancher)|
This species is a vector of the New Jersey and New York strains of potato yellow dwarf virus a
nd wound tumor virus of clover in the Eastern United States, Transmission of these viruses from diseased crimson clover to healthy crimson clover plants was first reported by Black (81) in 1944. However, transmission of the New York strain of potato yellow dwarf was rare; only 2 of 465 specimens used in the tests were vectors. In three separate experiments, quadripunctata transmitted the New York strain of potato yellow dwarf virus to 5 of 131 test plants, the New Jersey strain to 64 of 310 test plants, and wound tumor virus to 32 of 179 test plants. No transmissions were effected with clover club leaf virus. Latent period of both strains of potato yellow dwarf virus in the vector varied from 15 to 36 days and for wound tumor virus, 14 days.
This species is not considered an important natural vector in the natural spread of these viruses owing to its association with plant habitats outside of virus sources.
Small, very robust species, male 3.75—4.00 mm., female 3.95—4.25 mm.
General color light brown. Vertex with two distinct black spots; pronotum with two distinct black spots near posterior margin, spots sometimes faded in males; elytra uniformly light brown.
Pygofer in lateral aspect about 1½ times wider than long, caudal margin produced posteriorly at middle to large, blunt truncate lobe; aedeagus in lateral aspect very long, narrow, tubelike along distal three-fourths, shaft extremely narrow in dorsal aspect; gonopore terminal; style in dorsal aspect bibbed, lobes short, curved, margins smooth; female seventh sternum in ventral aspect with caudal margins slightly rounded and sinuate.
species, related to
can be separated by the pygofer with the middle of the caudal margin produced posteriorly to a broad lobe and the aedeagus with the shaft sharply attenuated apically in dorsal aspect.
|Nielson, M. W. 1968b. The leafhopper vectors of phytopathogenic viruses (Homoptera, Cicadellidae). Taxonomy, biology and virus transmission. United States Department of Agriculture Technical Bulletin . 1382 386 pp.|