- (Public Value) UCANR: Safeguarding abundant and healthy food for all Californians
- Author: Pershang Hosseini
- Author: Tong Zhen
- Author: Matthew Fatino
- Author: Brad Hanson
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![Figure C](https://ucanr.edu/blogs/UCDWeedScience/blogfiles/107204small.png)
Broomrapes (Orobanche and Phelipanche spp.) are obligate plant parasites with a broad range of agricultural crop hosts. In non-parasitic plant species, seeds generally initiate germination when exposed to favorable conditions of temperature, humidity, oxygen, and, occasionally, light. However, for obligate parasitic plants like broomrapes, a chemical signal from the host plant is essential. Germination of broomrape can only occur under appropriate soil conditions and when the seed receives a strigolactone chemical signal released from the roots of a suitable host. Strigolactones (SLs) are carotenoid-derived hormones that play a crucial role in various aspects of plant growth and development. Fertilizers can regulate...
- Author: Ben A Faber
- Posted by: Gale Perez
![Palmer amaranth](https://ucanr.edu/blogs/UCDWeedScience/blogfiles/107133small.jpg)
Rely® 280 Herbicide Available for Use in California Avocado Groves
The California Department of Pesticide Regulation (DPR) has approved the herbicide Rely® 280 (glufosinate-ammonium) for use in avocado groves in California. Rely® 280 is a post-emergence broad-spectrum herbicide for use against broadleaf and grassy weeds. Glufosinate-ammonium is an excellent alternative to glyphosate, especially for those weeds that have developed glyphosate resistance.
The California Avocado Commission provided funding for Dr. Peggy Mauk, extension professor for subtropical horticulture at the University of California, Riverside, to conduct efficacy trials with...
/h3>- Author: Jorge Antonio Angeles
- Posted by: Gale Perez
![Figure 1. From left to right: Silverleaf nightshade (Solanum elaegnifolium), Black nightshade (Solanum nigrum), Hairy nightshade (Solanum physalifolium). Weeds in the nightshade family can be found in orchards and in annual crops. Silverleaf nightshade produces silver green leaves, violet flowers, and yellow berries. Black and hairy nightshades produce white flowers and black berries. UC IPM.](https://ucanr.edu/blogs/UCDWeedScience/blogfiles/106360small.png)
Silverleaf nightshade, Solanum Elaeagnifolium, is perennial weed that is native to South America, Mexico, American Southwest and Southern States. This herbaceous and woody summer weed belongs to Solanaceae just like other weeds such as black nightshade (Solanum nigrum), hairy nightshade (Solanum physalifolium) and horsenettle (Solanum carolinense). It can be found throughout California and in grows in desert and semi-arid areas. Silverleaf nightshade is often found growing in different cropping systems, rangeland, pastures, roadsides, and disturbed areas. Silverleaf nightshade is highly adaptable and can tolerate a wide range of soil and climatic conditions such as high temperatures, low rainfall,...
- Author: Whitney B Brim-Deforest
- Posted by: Gale Perez
![Rice (photo credit: Brad Hooker)](https://ucanr.edu/blogs/UCDWeedScience/blogfiles/106159small.jpg)
This year brings several new chemical tools to California rice. With many herbicide-resistant species as well as emerging problematic weed species, the new chemistries are a welcome tool for managing resistance and preventing the selection of resistant biotypes.
Last year, we had use of Loyant® CA Rinskor™ active (florpyrauxifen-benzyl) for the full season (registered late in 2022). Loyant®, which is an auxin mimic, is applied as a foliar product. It gives additional options for early-season control of sedges and broadleaf weeds, and although not strong on watergrasses when applied alone, provides added control when tank-mixed with other herbicides for grass control. Based on data collected in 2022-2023, two good...
- Posted by: Gale Perez
![Interviews on electric weeding research](https://ucanr.edu/blogs/UCDWeedScience/blogfiles/106107small.jpg)
From the eOrganic and Performance and Economics of Electric Weed Control in Organic Perennial Crops Project:
Electric Weeding Research Updates
(Click HERE to see the presentations)
- Electric Weed Control in Orchards • Tong Zhen, Ph.D. student (Hanson Lab) at UC Davis
- Crop Safety and Weed Control in Organic Highbush Blueberries Using Electric Weeding • Luisa Baccin, Ph.D. student (Moretti Lab) at Oregon State University