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Over the past 20 years, there has been an unprecedented development of insecticide
chemistry that has had a major impact on how PCAs manage insects on leafy vegetables
and melons. Among these were several breakthrough chemistries including the neonicotinoids,
spinosyns, ketoenols and diamides. Without question these products (along with other
recently registered compounds) are more effective and safer to use than compounds
used prior to 1993. It appears that the AgriChemical Industry is beginning a new
cycle of insecticide discovery and development where several new products are nearing
registration. In 2014, it is anticipated that several new insecticide products will
be available for management of the key pest found on desert crops. Closer (Sulfoxaflor)
is currently registered for use in leafy vegetables and melons in Arizona and should
have an excellent fit for aphid management in leafy vegetables. Although it has
a similar target site as the neonicotinoid chemistry, it is not considered a neonicotinoid
by IRAC because of differences in how insects metabolize the toxin. Rather, it is
classified as a sulfoximine and the first of the chemical class to be registered.
Exirel/Verimark (Cyazypyr) are anticipated to be registered in Arizona/California
in early 2014. Cyazypyr is not a new chemistry, but rather a 2nd generation Anthanilic
diamide. What sets Cyazypyr apart from the other diamides is its unique cross-spectrum
activity against major chewing and sucking pests via soil systemic or foliar applications.
Two other compounds, Sivanto (flupyradifurone) and Torac (tolfenpyrad) are anticipated
to be available in late 2014-early 2015. Sivanto, like Closer, is not a neonicotinoid,
but rather is considered a Butenolide. It has good activity against whiteflies as
both a foliar spray and as a soil-applied systemic treatment. As a soil systemic
in fall melons, it has shown to be very effective against adult whitefly and CYSDV
suppression similar to Venom. Finally, Torac is a pyrazole; a mitochondrial complex
I electron transport inhibitor. In essence, it is a metabolic toxin that inhibits
energy metabolism when the insect comes in contact with the compound. It has shown
good thrips activity when used in combination with Radiant or Lannate, and may be
an alternative to pyrethroids in tank mixtures. More detailed information on these
compounds can be found in the following publications:
New Insecticides for Desert Produce and Melons.
Click picture to listen to John’s update To contact John Palumbo go to: jpalumbo@ag.arizona.edu |
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For questions or comments on any of the topics please contact Marco Pena at the Yuma Agricultural Center.
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