| Problem Code: |
Resis
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| Requesting State(s): |
Rios,Sonia (CA)
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| Potential Products: |
Matrix; Prowl H2O; Alion; Chateau; Select Max; Rely 280; Treevix; Pindar GT; Embed Extra; Rinskor
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| Reason for Need - Comments: |
Commercial dates, P dactylifera, the date palm, are produced in the United States. California produces the largest amounts of dates, followed by Arizona. These two states account for almost all US date production. Most date production takes place in the Coachella Valley, Riverside County, CA; Imperial County, CA; and Yuma County, AZ. The principal date cultivars produced are ‘Deglet Noor’ and ‘Medjool’. In 2017, California produced 35,000 tons of dates from 9,900 acres. Yield per acre was 3.82 tons, priced at $2,840 per ton. The total value of the crop was $98.8 million (“Noncitrus Fruits” NASS, 2018). Arizona has about 5600 acres of dates (T. Joseph, personal comm.) Most growers depend heavily on Roundup (glyphosate. Group 9) for their weed control, if any control is used at all. However, glyphosate is under increasing political and social scrutiny and when used exclusively can run the risk of creating glyphosate-resistant weed populations in orchard and nursery settings. Currently, only four herbicides (oxyfluorfen (Goal), carefentrazone (shark), glyphosate (Roundup), and pyraflufen (Venue) are registered in California for use in bearing date palm orchards, so work needs to be done to help palm stakeholders deal with the shortage of herbicide options. To date, there has been no herbicide research done in California or nationwide for in date palms. Currently, there are several weeds that are problematic weeds in California date palms such as summer annuals like Palmer amaranth (Amaranthus palmeri), winter annuals such as, horseweed (Erigeron canadensis), and several summer and winter annual grasses.
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