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OVERVIEW
Lygus treatments were expected to start in the very southern SJV over the weekend (5/30-31). We received a report late Thursday from Dale Deshane with Supervised Control in Bakersfield that his staff had been picking up counts running 5 to 12. "A lot of grains are being cut in the area, and they’re full of weeds, and I’m assuming that’s the source for the lygus," Deshane said. "It looks like we’ll have to spray quite a few fields this weekend."
Miticide applications being reported this week were preventive.
First irrigation is starting in a few more areas.
CROP REPORTS
Sara Savary, PCA Crop Care Associates, Fresno: "We’re getting ready for that first irrigation. We’ve made 2 glyphosate sprays and one miticide application, and that’s all we’ve done. I’m not sweeping yet. We’re only at 6-leaf, with no squares yet. I haven’t found any lygus in alfalfa sweeping. Usually by now I’m seeing them in the tomatoes, but lygus aren’t in those fields, either. Our alfalfa is doing fine. We haven’t had any worm sprays. Last year we had that early armyworm mess in May, which is kind of unusual, but that hasn’t happened this year. We have an armyworm flight later in June. I found a single egg mass in tomatoes today (5/29), so I guess it’s on the way. At this point, though, you can’t tell how large it might be."
Joe Baird, Agri-Valley Consulting, Merced: "Cotton is starting to square, and we have 2.5 to 3 fruiting nodes on the earliest cotton. Lygus pressure is real low, and mite pressure is, too. We’re trying to finish all of our weed control treatments and clean up the misses, plus get ready to sidedress and irrigate the first time. Most of the corn is planted now. We’ve treated the grain corn for spider mites, and irrigation is going on."
Tony Touma, PCA, Bio Ag Consulting, Bakersfield: "Cotton in Buttonwillow has just started squaring, and we will begin sweeping next week. The cotton is at the sixth to seventh node, and these squares are staying on. We’re applying miticides on most of the cotton in Buttonwillow. We always apply before first water. If we wait until after that first irrigation starts it could be 3 to 4 weeks before growers could get in again with their own equipment. We’ve tended to find that 4 oz/acre of Zephyr at this point will usually last all season if we don’t have to spray for lygus. No problems in the alfalfa right now."
Bob Hutmacher, Extension Cotton Specialist: "This week I’ve been in growers’ fields in Tulare, Kings and Fresno Counties, plus fields at the Shafter and West Side research stations. Most cotton I’ve seen looks fairly good. There are locations where cotton sustained significant, early thrips injury, in some cases enough to damage terminals. That cotton is coming out of it now, and leaves are expanding a little more normally.
"Most of the cotton I have seen this past week ranged from about the 5- to 9-leaf stage. With the hot weather recently, the plants that have not been irrigated yet look a little dusty and, predictably, don’t have a lot of leaf area yet. Some of the larger plants, especially those irrigated within the past week, have leaves that are starting to expand quite fast. When plants reach about the 7- to 9-leaf stage and we’re in this rapid leaf expansion mode, it becomes important to evaluate timing of first irrigation if it hasn’t already been done. Besides rapid leaf area expansion, square development starts to become more apparent, and you can begin evaluating progression toward first bloom.
"This is perhaps a ‘broken record’ comment, but when plants are still small it is always important to pull out a shovel and evaluate stored soil water in the root zone – especially the upper 12 to 18 inches. Delayed first irrigations can be a good approach in trying to get by with less total irrigation water, but make sure that roots have adequately tapped into deeper stored water to avoid severe stress. You still don’t want plants to be severely stressed as they move into rapid leaf area expansion and square development.
"On a separate note, I’ve been in 2 fields this week that appear to be newly-identifed locations infested with Race 4 fusarium, although we won’t have that confirmed for a while. This period prior to first bloom is the best time to evaluate rough areas in fields and assess whether fusarium might be present or if some other issue is a likely problem."
ALSO AT AGFAX.COM
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