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

Posts Tagged: herbicide application

Drip-applied Kerb (Pronamide) in lettuce

Figure 1. Untreated plot (left) and Pronamide (Kerb at 2.5 pints/A) applied via drip tape (right) 30 days after transplanting of romaine lettuce. Areas most distant from drip tape that supplied herbicide show weed survivorship.

Over the years of Kerb use in lettuce (more like decades) there has been a lot of work on application methods. Our transplanted lettuce in southern California is usually grown on drip and when possible, we like to apply all things through it. Our fields...

Posted on Tuesday, January 29, 2019 at 3:24 PM
Focus Area Tags: Agriculture Pest Management

Weed control under a changing climate

Maor Matzrafi is a post-doctoral researcher with Marie Jasieniuk's lab at UC Davis.

Maor Matzrafi is a post-doctoral researcher with Marie Jasieniuk's lab at UC Davis. It is well known that herbicide efficacy is strongly associated with environmental conditions (Kudsk and Kristensen, 1992), and this is why applicators are required...

Posted on Tuesday, August 7, 2018 at 9:59 AM

2017 Automated Thinner/Weeder Spray Materials Evaluation

Figure 1. A three 80-inch bed wide automated thinner (note the rectangular treated areas where the unwanted plants are removed interspersed with unsprayed areas for the keeper plants)

Lettuce in the Salinas Valley is direct seeded by planting 3–4 times the amount of seed need and then thinning the stand to the desired spacing. Lettuce is one of the few crops that is still thinned because seed is still cheap enough and high yield...

Table 1. Weed counts (no/2 ft2) on Sept. 26 (4 days after application)
Table 1. Weed counts (no/2 ft2) on Sept. 26 (4 days after application)

Table 1. Weed counts (no/2 ft2) on Sept. 26 (4 days after application)

Table 2. Weed counts (no/2 ft2) on Sept. 29 (7 days after application)
Table 2. Weed counts (no/2 ft2) on Sept. 29 (7 days after application)

Table 2. Weed counts (no/2 ft2) on Sept. 29 (7 days after application)

Figure 2. Sharpen at 1.0 oz/A
Figure 2. Sharpen at 1.0 oz/A

Figure 2. Sharpen at 1.0 oz/A

Figure 3. Shark at 9.7 mls/A
Figure 3. Shark at 9.7 mls/A

Figure 3. Shark at 9.7 mls/A

Figure 4. Suppress (+Oroboost & oil)
Figure 4. Suppress (+Oroboost & oil)

Figure 4. Suppress (+Oroboost & oil)

Figure 5. Raptor at 4.0 oz/A
Figure 5. Raptor at 4.0 oz/A

Figure 5. Raptor at 4.0 oz/A

Figure 6. Rely 29 oz/A (Sept 26)
Figure 6. Rely 29 oz/A (Sept 26)

Figure 6. Rely 29 oz/A (Sept 26)

Posted on Monday, November 27, 2017 at 3:50 PM

An Alternative Preemergence Herbicide Strategy for Summer Grasses in Orchards

As most orchardists and pest control advisors are well aware, glyphosate-resistant weeds have been one of the biggest weed management challenges in California orchard crops for several years. Depending on where you are located in the Central Valley,...

Posted on Thursday, March 31, 2016 at 3:32 PM

Home made herbicides? Some thoughts about 'Do It Yourself' weed control.

Screenshot 2015-05-27-10-22-22

I was browsing the internet the other day and came across a web-site that told me I could kill weeds without using pesticides. Naturally, I was intrigued and decided to read up on DIY chemical weed control. I won't be posting any recipes on this blog...

Posted on Wednesday, May 27, 2015 at 2:28 PM

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