|Lettuce infectious yellows virus|
|LIYV on a Lettuce|
|Species:||Lettuce infectious yellows virus|
Lettuce infectious yellows virus (LIYV) of lettuce, cucurbits, and other vegetable crops was first recognized as a distinct viral pathogen in the Southwestern USA. and Mexico in the early 1980's, associated with increases in populations of sweet potato whitefly.
Leaves show yellowing and/or reddening between veins and stunting of affected plants. Chlorosis of leaves may develop into brittleness.
Compact lettuce heads fail to develop.
In cucurbits, a splotchy mottle or interveinal chlorosis develops on mature leaves. This may be accompanied by vein-clearing, mild mosaic, subtle curling of the tips of young leaves, and a leathery texture in older leaves. Plants are stunted, exhibit poor fruit set and/or incomplete fruit development. Symptoms may appear as early as 3 weeks after plants emerge or 10-12 days after inoculation.
- ↑ Duffus, J.E. Mayhew, D.E. and Flock, R.A. (1982). A new whitefly transmitted virus of the desert Southwest (abst.). Phytopathology 72:963.
- ↑ Brown, J.K. and Poulos, B.T. (1989). Detection of lettuce infectious yellows virus in greenhouse and field inoculated plants using an indirect enzyme-linked immunosorbent assay. J. Rio Grande Valley Hon. Soc. 2:13-18.
- ↑ Brown, L.G. Brown, J.K. and Tsai, J.H. (1990). Lettuce Infectious Yellows Virus. Plant Pathology Circular No. 335. Fla. Dept. Agric. & Consumer Serv, Division of Plant Industry.
- ↑ a b Brown, J.K., and Nelson, M.R. (1986.) Whitefly-borne viruses of melons and lettuce in Arizona. Phytopathology 76:236-239.
- ↑ Ray, D.T. McCreight, J.D. McGrady, J.J. and Brown, J. K. Resistance in cultivated and wild lettuce to lettuce infectious yellows virus. College of Agriculture Vegetable Rept., Series P-78. Coop. Ext. Serv./Agric. Expt. Stn., Univ. of Arizona, Tucson. 115 pp.
|Adverse conditions||Bolting · Calcium deficiency · Phosphorus deficiency|
|Diseases||Aster yellows · Bacterial leaf spot of lettuce · Downey mildew · Grey mould · Lettuce infectious yellows virus · Mosaic virus · Sclerotinia rot|
|Pests||Aphid · Cutworm · Flea beetle · Root-knot nematode · Slug|