- 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>- Posted by: Gale Perez
![Weed Science Society of America (WSSA) logo](https://ucanr.edu/blogs/UCDWeedScience/blogfiles/106927small.png)
Sterile Pollen Technique Shows Promise for Palmer Amaranth Weed Control
Newly published research provides a novel and sustainable weed-management strategy
WESTMINSTER, Colorado – 22 May2024 – Recently published research in the journal Weed Science shows that a sterilization technique commonly used to control insect pests can be modified to control weeds that require pollination to reproduce. More specifically, the researchers determined that employing a sterile pollen technique (SPT) could effectively disrupt Palmer amaranth (Amaranthus palmeri S.) reproduction.
Palmer amaranth remains among the most detrimental weeds in North American agriculture,...
/h3>- Author: Ryan Hill
- Author: Marcelo Moretti
![Pollinator habitat coverage in response to herbicide treatments](https://ucanr.edu/blogs/UCDWeedScience/blogfiles/106853small.png)
Introduction:
Pollinator insects are essential to produce many economically and nutritionally important crops grown in the western USA. These crops include blueberries, almonds, sunflowers, cucurbits, and many others. Almond pollination in California plays a vital role in the apiary industry, driving beekeepers to haul huge numbers of bee colonies to California for the few weeks in late winter when almonds bloom. Bees are selective of the pollen and nectar they forage, and diverse floral resources can allow bees to forage according to their nutritional needs (Leponiemi et al. 2023). Planting pollinator habitat in natural areas, gardens, and agricultural land is one method of supporting bee health....
- Author: Drew Lyon
- Posted by: Gale Perez
![Downybrome, Italian ryegrass, winter wheat](https://ucanr.edu/blogs/UCDWeedScience/blogfiles/106368small.jpg)
In my previous position as the Extension Dryland Cropping Systems Specialist with the University of Nebraska Panhandle Research and Extension Center in Scottsbluff, I focused my research efforts on intensifying and diversifying the winter wheat-fallow cropping system. The addition of summer crops into the rotation was a first step. Inserting summer crops such as proso millet, sunflower, or corn reduced the frequency of summer fallow from every other year to once every three years. Summer crops also helped in the management of winter annual grass weeds such as downy brome, jointed goatgrass, and feral rye. As I looked for ways to eliminate summer fallow from the rotation, my attention turned to forage...
- 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,...