UC Weed Science (weed control, management, ecology, and minutia)

Branched broomrape can be difficult to detect in processing tomato fields due to its small stature. Its extended period of emergence and rapid progression from emergence to flowering (shown here) to having mature seed further complicate control strategies. (Photo credit: Matthew Fatino)

The potential threat of branched broomrape for California processing tomato: A review

August 12, 2021

By Brad Hanson

From the California Agriculture 75(2):64-73. https://doi.org/10.3733/ca.2021a0012 ********** Abstract Branched broomrape (Phelipanche ramosa), a parasitic weed that was the focus of a $1.

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UC Rice Pest Management Course 2021 eventbanner

EVENT :: Rice Pest Management Course 2021

August 10, 2021

EVENT: UC Rice Pest Management Course 2021 DAY/DATE: Friday, Sept. 10, 2021 LOCATION: Hamilton Road Field (on West Hamilton Rd. between Hwy. 99 and Riceton Hwy.

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EVENT :: Weed identification webinar

August 8, 2021

The UC Statewide IPM Program is hosting a free webinar.

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Figure 1. Mature common chickweed flower and leaves close-up.

Poor control of common chickweed with ALS-inhibitor herbicides reported in multiple small grain fields in the southern San Joaquin Valley. Is it a new case of herbicide resistance in California?

August 4, 2021

By Brad Hanson, Mark E Lundy, Nicholas E Clark, Sarah E Light

Common chickweed (Stellaria media) (Figure 1) is a winter annual found throughout California and considered to be one of the most common broadleaf weeds infesting cereal crops (also referred as small grains) in the state (Wilen 2006).

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CDFA issues stop use notice on organic pesticides Whack Out Weeds! and EcoMight-Pro

August 2, 2021

By Karey Windbiel-Rojas

Whack Out Weeds! and EcoMight-Pro contain glyphosate, bifenthrin and permethrin and CDFA has issued a stop order for use on organic farms in the state of California. The press release is shown below.

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