- Posted by: Gale Perez
Area IPM Advisor
Applied Research and Extension
Northern Sacramento Valley (Butte, Glenn, Colusa, Sutter, Yuba, and Tehama counties)
The University of California, Agriculture and Natural Resources (UC ANR), a statewide program with local...
Root-inhibiting herbicides (like pendimethalin or trifluralin) are soil-applied and pre-plant incorporated as a standard practice for conventional processing tomatoes in the Sacramento Valley.
Earlier this year, I visited a young processing tomato field with herbicide injury on a significant amount of plants. The plants had the swelling I've seen with trifluralin injury on tomatoes and no/very little root growth above the root ball/transplant plug. They were also very brittle and easily snapped in half which can be characteristic of pendimethalin injury. Some of the affected plants had snapped at the weakened area likely from the north winds over the previous weekend. More plants were affected in the sandier pockets of the...
Richard Smith is the University of California Cooperative Extension Monterey County Vegetable Crop Production and Weed Science Farm Advisor. He also covers Santa Cruz and San Benito counties.
Weeds are an important host of Impatiens Necrotic Spot Virus (INSV) in the Salinas Valley. It is a tospovirus that is spread primarily by western flower thrips (Frankliniella occidentalis). It has a wide host range of over 600 species of plants, including vegetables such as lettuce, tomatoes and peppers and many ornamentals. In the Salinas Valley, many weed species serve as a.../span>
- Author: Mike Pitcairn
- Author: Lincoln Smith
- Author: Patrick J. Moran
- Posted by: Gale Perez
Mike Pitcairn is with the California Dept. of Food & Agriculture (email@example.com). Lincoln Smith (firstname.lastname@example.org) and Patrick Moran (email@example.com) are with USDA Agricultural Research Service....
- Author: Petr Kosina
A brand-new online course on Diagnosing Herbicide Injury focusing on how an herbicide injury situation can arise, what information can help diagnose symptoms during field investigations, and what tools are available to you, is now available from the UC Statewide Integrated Pest Management program (UC IPM).
When unexplained damage is noticed on a crop or other non-weed plant, herbicides are often a primary suspect. That is no surprise because herbicides are very powerful and effective tools used to control weedy plants in a wide variety of locations. However, symptoms of many...