Aug 20, 2020
Some 25 to 30 percent of vineyards in Washington state have nematode population densities that are considered damaging. Nematodes have a slow, chronic negative impact on vine health. Plants have less foliage and visible weak spots in the field.
Inga Zasada, Research Plant Pathologist with the USDA Agricultural Research...
Aug 6, 2020
Pierce’s Disease is caused by bacteria spread by xylem sucking insects. The bacteria move quickly throughout the vine causing disease which blocks the flow of liquid through the plant. Symptoms of leaf scorching – leaves that are curled and dried up on the edges - show up mid-summer. This pathogen is successful...