UCCE Master Gardeners of San Joaquin County
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UCCE Master Gardeners of San Joaquin County

Posts Tagged: resistance

And Now Paraquat

52268 original

A recent call about the poor control of marestail (horseweed, Conyza canadensis) to glyphosate (Roundup®) wasn't surprising, but that paraquat didnt do the trick was.  It turns out that there is multiple resistance to the materials. ...

Posted on Monday, June 4, 2018 at 8:00 AM
Tags: avocado (4), citrus (30), fleabane (2), hairy (1), herbicide (61), horseweed (7), marestail (4), pesticide (14), resistance (6)
Focus Area Tags: Agriculture

Traveling for the Holidays? Don’t Let the Bed Bugs Bite!

Egg, five nymphal stages, and adult bed bugs, Cimex lectularius. {D.W.Choe]

Do you plan to stay in a hotel during the holidays this year? If so, do you know how to look for bed bugs and prevent them from coming home with you? UC IPM can help. We have detailed information as well as videos to help make your holidays bed...

Posted on Thursday, December 22, 2016 at 2:54 PM
Tags: bed bugs (24), bite (10), holidays (8), hotels (2), inspect (1), pesticide (14), prevention (8), resistance (6), uc ipm (223)

Horseweed resistance

Conyza (young)

From the Topics in Subtropics blog ∴ June 15, 2016 Researchers have now confirmed that six glyphosate-resistant weed species have been identified in California. Four have been known to exist for some time; they are horseweed (marestail,...

Posted on Wednesday, June 22, 2016 at 5:00 PM

Herbicide resistant weeds in your neighborhood

Young plants of hairy fleabane

From the Topics in Subtropics blog :: July 5, 2013   It is not always easy to kill weeds with herbicides for several reasons, but if you apply the right material at the right time to susceptible weeds you expect control. But you should never...

Posted on Thursday, March 20, 2014 at 7:50 AM
Tags: glyphosate (31), hairy fleabane (8), herbicide (61), horseweed (7), marestail (4), resistance (6), weeds (64)

Getting horseweed and hairy fleabane back under control in central California


While both horseweed and hairy fleabane have been here since farming began in the region, it's only since about 2003 that they have become such an obvious problem, particularly in tree and vine systems and non-crop areas. In the past, the traditional...

Posted on Thursday, March 13, 2014 at 7:53 AM
Tags: hairy fleabane (8), herbicide (61), horseweed (7), resistance (6), weeds (64)

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