University of California

Western celery mosaic


Henry H. P. Severin
Julius H. Freitag

Authors Affiliations

Henry H. P. Severin was Associate Entomologist in the Experiment Station; Julius H. Freitag was Junior Entomologist in the Experiment Station.

Publication Information

Hilgardia 11(9):493-558. DOI:10.3733/hilg.v11n09p493. September 1938.

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Abstract does not appear. First page follows.

Western celery mosaic has increased in the celery-growing districts in Los Angeles, Orange, San Mateo, Santa Clara, Alameda, Yolo, and Sacramento counties and is causing serious losses to the growers. The destructiveness of western celery mosaic was evidenced by a reduction in yield in the Venice district: Milbrath(17)4 reported that in 1932 a total of 2,737 cars of celery went from that district; in 1933 there were about 982 cars, and the estimate for 1934 is less than 500 from approximately the same acreage. Brock(1) estimated that in 1934 celery mosaic in the Venice district reduced the production of celery to about 16 per cent of normal car loadings. The decline in yields during 1930-1934 in two celery districts in Los Angeles County is shown in .

Table 1.

Yields of Celery in the Venice and Culver Districts, Los Angeles County

Yield per acre, in half in cratesYearAcreageProduction, half crates1930.............................7001,026718,2001931.............................1,100740814,0001932.............................1,500661991,5001933.............................1,300555721,5001934.............................900311279,9001935.............................200800160,0001936.............................950926879,7001937.............................950847804,650

Sources of data:


1930-1931: from Milbrath (18, 19).

1932-1937: Milbrath, D. G., and Harold J. Ryan. A method of control of western celery mosaic. California State Dept. Agr. Mo. Bul. 27 (3): 290-95. 1938.

In 1933 the f.o.b. value of the celery crop in Los Angeles County was $1,965,455. This value was exceeded by only two other crops—eitrus and walnuts. In 1934, the f.o.b. value of the celery crop was $838,490; the celery crop was fifth in importance.5

Celery infected with western celery mosaic when shipped to the middle western and eastern markets becomes soft in transit according to growers.

Literature Cited

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Severin H, Freitag J. 1938. Western celery mosaic. Hilgardia 11(9):493-558. DOI:10.3733/hilg.v11n09p493

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