Calag Archive

Not available – first paragraph follows: In the overall scheme of things in agriculture, cabbage yellows is not a particularly damaging disease. The pathogen, however — Fusarium oxysporum f. sp. conglutinans, referred to as “Foe” — belongs to a group of troublesome, very damaging, and economically important fungi that cause the Fusarium wilt diseases. The main species, F. oxysporum, has varieties (called “forma species”) that lead to heavy losses in crop plants worldwide, including cotton, tomato, banana, cucurbits, crucifers, and many ornamental crops.

Not available – first paragraph follows: Common corn rust caused economic loss to sweet corn growers in San Diego County during 1978-80 and in Orange County in 1985. The disease, caused by the fungus Puccinia sorghi, is favored by cool temperatures and high relative humidity.

Not available – first paragraph follows: Tehama County is California's northernmost area of sugarbeet production. Sugar-beets previously were planted in the early spring and harvested in the fall of the same year. In 1978, however, it was decided to overwinter the crop in this area for harvest the following spring. This decision was based on improving the efficiency of the nearby processing plant by increasing the length of its run and on the 10-mile isolation of the Tehama County beet-growing area from other beet-growing areas. This isolation was considered sufficient to prevent the transfer of aphid-borne viruses from the overwintered beets to the early-spring-planted beets to the south.