Hopefully everyone knows that chlorpyrifos (Lorsban and several generic products) tolerances on all food crops were lost on February 28, 2022. This makes ANY application on February 28 or later to a food crop illegal (even though the label on the jug has not changed, nor has the label been…
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While results of any bioassay against diamondback moth primarily applies to the specific population tested, we do try and share results of our bioassays from time to time. Below are the results of two recent bioassays conducted by Thomas Dunn (under the direction of Dr. David Riley). In both bioassays,…
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We were able to conduct a bioassay on a population of diamondback moth last week. Keep in mind we work in fields with severe problems and high populations. Also, responses to insecticides can vary greatly from location to location – mostly based on to which insecticides the population has been…
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I have received questions concerning the current use of chlorpyrifos (Lorsban and generics) on registered food crops. You will undoubtedly hear a great deal about this at the end of the month as the rule which cancels all tolerances on food crops will go into effect on October 29; however,…
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Just a quick update on the broad mite efficacy test. Ty Torrance completed the second check on this tests today, 6 days after the applications. Thanks for Ty’s persistence for getting this test in and completed. This was actually our second attempt at a broad mite test this season. All…
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Broad mites are back (and have been for a while) and they have become common in the fall. Some fields have been treated twice and still have mites. Some have been cleaned up successfully. First – a couple of reminders: Do not put a sticker with Agri-Mek (also no chlorthalonil…
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We have received many questions about Lorsban in the last week. EPA has provided a prepublication version of the final rule which will revoke all food tolerances. Some changes are possible, but not likely. Upon publication, all food tolerances for chlorpyrifos will be cancelled 6 months later (again, some changes…
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I received a question this week about spraying for spider mites and protecting honey bees. First and foremost, spider mite problems are frequently a result of repeated application of broad-spectrum insecticides. Don’t apply these products without a specific need. That said, spider mites have become a more consistent problem in…
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The outlook for problems with whitefly transmitted viruses does not look good for fall 2020 vegetable crops. Several viruses were reported at low levels at the end of the spring crops and have already been detected in early fall crops/experiments. This combined with rapidly increasing whitefly populations (and continued hot,…
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I believe everyone knows that whitefly populations have been building dramatically the last few weeks. Whiteflies love hot dry weather and reproduce rapidly under our current conditions. While we are probably not as bad as we were in 2017 (maybe a month behind), we are far ahead of the last…
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