- (Public Value) UCANR: Safeguarding abundant and healthy food for all Californians
- Author: Mark Bolda
Introduction: An interesting phenomenon that I've been called out to a number of strawberry ranches starting about five years ago has been the appearance of aborted flowers, also known by growers as duds, in noticeable numbers right around and after the longest day of summer - June 21, the equinox. As shown in Figures 1 and 2 below, the duds would present themselves as browned out centers of the flowers with no fruit forming subsequently.
With the idea that these duds may be caused by an excess exposure to ultraviolet (UV) radiation brought about by the longer days, I worked with a Salinas grower in 2018 and 2019 to apply a protective layer with a liquid surfactant called Shadow, (a lignin material...
- Author: Dustin Blakey
Our dry climate on the east side of the Sierra Nevada works wonders to control fungal diseases. Most fungi prefer moist environments. While we still get an occasional fungal pathogen, we seem to have greater problems with insects and viruses. In many cases the insects and viruses team up to cause real mayhem in the garden.
In our area we have been subject to continual attacks on tomatoes by viruses. Our most common viral issue is beet curly top virus spread by the beet leafhopper. It is widespread from Coso Junction through Bishop. You may be familiar with its distinctive symptoms: curled up leaves, possibly with a purple...
- Author: Luis Espino
The last time we saw a severe blast epidemic was 2011. Since then, we haven't had much blast; in fact, I had not see any blast at all during several years. I don't think 2019 qualifies as a severe blast year, but there is more blast than in the previous few years.
Blast is caused by a fungal pathogen, Pyricularia oryzae. This fungus can affect any plant part, and usually we refer to blast according to the tissue affected. Leaf blast, node blast, collar blast, and neck blast (when it affects the node right below the panicle) are all caused by the same pathogen.
- Author: Surendra K. Dara
Good nutrient management is essential not only for optimal plant growth, but also for maintaining good plant health and the ability of the plant to withstand biotic and abiotic stressors. Strawberry, a $3.2 billion commodity in California, requires good nutrient, water, and health management throughout its lengthy fruit production cycle. In addition to the primary nutrient inputs, certain supplements can be beneficial to the crop. A study was conducted in fall-planted strawberries from 2017 to 2018 using a plant-based anti-stress agent, humates, and sulfur, and a special formulation of NPK as supplements to the standard fertility program to evaluate their impact on...
Vegetation weed management
Vegetation weed management is something CAL FIRE feels strongly about, especially during times of drought. CAL FIRE interprets this type of weed management as a fuel reduction or fuel modification practice which helps growers create defensible space around their habitable structures or groves. Defensible space is a buffer between property (i.e. homes, groves, infrastructure) and plants (i.e. brush, trees, etc.) or other items surrounding the property to be protected that could catch fire and act as fuel.
Defensible space is needed to slow the spread of a wildfire and improves the safety of firefighters defending properties. Defensible space reduces the fire risk...