Weeds Continued from Page 7
Mick Canevari, a UCCE farm advisor emeritus, said ideally he’d like to see growers apply pre-emergent herbicides in November or early December so they can take advantage of rains to incorpo- rate products into the soil. Pre-emergent herbicides kill weed seeds before they germinate or seedling weeds just after germination. The late fall timing also allows growers to apply prod- ucts before leaf fall. “When the plants start defoliating, that barrier helps because it prevents sunlight and germination for a month and helps extend the weed control,” said Canevari, who conducts weed control trials in San Joaquin County. A properly timed fall pre-emerge pro- gram may provide weed control through most of the winter, he said. Growers may follow up in late winter or early spring with post-emergent herbicides to manage already germinated weeds or a tankmix of pre- and post-emergent products. As mostly contact materials, post-emer- gent herbicides work best on small weeds,
Spring is a good time to apply post-emergent herbicides to address weeds in vineyards, at left. John Roncoroni, University of California Cooperative Extension weed science advisor emeritus in Napa County, right, says standing water may lead to more weed problems this year.
Canevari said. That may be a challenge this season, because rains provided am- ple moisture and weeds grew “pretty much uncontested” for months, he said. Standing water in some vineyards also has prevented growers from making timely herbicide applications. “If you think an herbicide is going to
control weeds that are 2 to 3 feet tall, it’s not going to happen,” Canevari said. What some growers may end up doing is making several post-emergent her- bicide applications this season to try to knock down overgrown weeds, he said. Among the weeds Roncoroni sees as potentially more troublesome this year are cheeseweed, also known as malva; ryegrass; nutsedge and horseweed. “Cheeseweed can be a problem every year, but it could be a bigger problem this year,” Roncoroni said. “It’s one of the first weeds to germinate during the fall, and we’ve had good growing condi- tions. By the time you’re getting out into your vineyards, these things are going to be huge.” If cheeseweed becomes too large,
Roncoroni said growers may have to incur additional expenses to hire hand crews to hoe out the tough, woody- stemmed plants. Italian ryegrass is a “huge” problem in North Coast vineyards, particularly those biotypes resistant to multiple herbicide modes of action. That includes glypho- sate, which at one time was the go-to her- bicide for ryegrass. Horseweed, also known as marestail, germinates in the fall as well as in the spring, he said. As with most other weeds, growers obtain the best control when they target small plants. “In light soil, when it’s given a chance, it can grow to be 6, 7 or 8 feet tall, which is a problem,” Roncoroni said. Many populations of horseweed and the related hairy fleabane are resistant to both glyphosate and paraquat herbicides. Yellow nutsedge flourishes in well-watered fields and vineyards. With standing water a problem in many areas this year, Roncoroni said he expected the weed to be a larger problem for some growers. Nozzle selection also is important to help herbicides hit weed targets, Roncoroni said. Some labels specify nozzle types or droplet sizes. Aside from those, he said, flat fan or other low-pres- sure nozzles that produce larger, cours- er droplet sizes help reduce drift and minimize potential off-target damage to young, tender plant tissue. With the possibility of larger weeds this season, Roncoroni said additional surfactants, which enhance herbicidal activity, may be needed. Ammonium sulfate, a common plant nutrient, also can boost glyphosate activity. In hard water, it ties up positively charged cal- cium, sodium and iron atoms and pre- vents them from binding with glypho- sate molecules. In addition, he said growers should check product labels for optimum wa- ter pH. Most herbicides work best when water is somewhat acidic in the 4-6 pH range. If water pH is above 7, or neutral, Roncoroni recommended adding a buf- fer to acidify it unless otherwise specified on the label. (Vicky Boyd is a reporter in Modesto. She may be contacted at vlboyd@att.net.)
MIGHTY BIG MIGHTY BIG SAVINGS .
www.californiabountiful.com
Get cash back 1 Get cash back 1 Get cash back 1
OR Low-rate financing 2 OR Low-rate financing 2 OR Low-rate financing 2
A Farm Bureau Production
LOCAL STATIONS KERO/23 Bakersfield
Get cash back 1 The small but mighty WORKMASTER™ 25S sub-compact tractor could be the perfect fit for you. Its 25-hp engine, three-point hitch and standard rear and mid-mount PTOs make it ideal for yard, landscape and property maintenance jobs. Its compact design makes it a cinch to maneuver, and a simple dual-pedal transmission eliminates shift levers and clutching. Just press and go.
Sat.
8:30 p.m.
KHSL/12 Chico/Redding Sat.
7:00 p.m. Sun. 6:00 a.m. Sun. 11:30 a.m.
OR Low-rate financing 2
KVPT/18 Fresno/Visalia
KCAL/9 7:30 p.m. KCBA/35 Monterey/Salinas Fri. 12:00 p.m. KMIR/36 Palm Springs Sat. 3:30 p.m. KSBY/6 Santa Barbara/San Luis Obispo Sun. 5:00 p.m. KMAX/31 Sacramento Sat. 7:30 p.m. KUSI/51 San Diego Sun. 11:30 a.m. KRON/4 SF Bay Area Sat. 6:30 p.m. Los Angeles Sat. SATELLITE TV RFD-TV: Dish Ch. 231, DirectTV Ch. 345
Hurry, offers end soon. Stop in today or visit nhoffers.com.
TULARE GARTON TRACTOR INC. 559-686-0054 www.gartontractor.com TURLOCK GARTON TRACTOR INC. 209-632-3931 www.gartontractor.com UKIAH GARTON TRACTOR INC. 707-468-5880 www.gartontractor.com WOODLAND GARTON TRACTOR INC. 530-615-2828 www.gartontractor.com
NEWMAN GARTON TRACTOR INC. 209-862-3760 www.gartontractor.com SANTA ROSA GARTON TRACTOR INC. 707-586-1790 www.gartontractor.com STOCKTON GARTON TRACTOR INC. 209-948-5401 www.gartontractor.com
FAIRFIELD GARTON TRACTOR INC. 707-425-9545 www.gartontractor.com FRESNO GARTON TRACTOR INC. 559-485-9090 www.gartontractor.com MADERA GARTON TRACTOR INC. 559-674-2496 www.gartontractor.com MODESTO GARTON TRACTOR INC. 209-538-0911 www.gartontractor.com
Sun. 8:00 a.m.*
*Times listed are Pacific Time SIMULCAST/STREAM KRON-ON
Sun. 6:30 p.m.
1 Cash back amounts vary and are applied at time of sale. Cash back offers are only available when financing purchase with CNH Industrial Capital America LLC or CNH Industrial Capital Canada Ltd. 2 For Commercial use only. Customer participation subject to credit qualification and approval by CNH Industrial Capital America LLC or CNH Industrial Capital Canada Ltd. See your participating New Holland dealer for details and eligibility requirements. Down payment may be required. Not all customers or applicants may qualify for this rate or term. CNH Industrial Capital America LLC and CNH Industrial Capital Canada Ltd. standard terms and conditions apply. Canada Example: The interest rate will be 0.00% for 36 months. Total contract term is 36 months. Based on a retail contract date of January 1, 2023, with a suggested retail price on a new WORKMASTER 25S and loader of C$26,486 customer provides down payment of C$5,297.12 and finances the balance of C$21,188.88 at 0.00% per annum for 36 months. There will be 36 equal monthly payments of C$588.58. The total amount payable will be C$26,486, which includes finance charges of C$0.00. Taxes, freight, setup, delivery, additional options or attachments not included in suggested retail price. Offer is nontransferable. Offers end March 31, 2023; subject to change or cancellation without notice. ©2023 CNH Industrial America LLC. All rights reserved. CNH Industrial Capital and New Holland are trademarks registered in the United States and many other countries, owned by or licensed to CNH Industrial N.V., its subsidiaries or affiliates.
Now trending
@cabountiful
8 Ag Alert March 22, 2023
Powered by FlippingBook