UV absorbers for reducing the E/Z isomerization of pesticides
The present invention provides the use of a UV absorber for reducing the E/Z isomerization of pesticides comprising a double bond. It furthermore relates to a composition comprising an E and/or a Z isomer of a pesticide comprising a double bond and a UV absorber.
1. A composition comprising metaflumizone and a UV absorber comprising a sulfonic acid group wherein the E isomer of metaflumizone is present in an amount to at least 90 wt. %, based on the total amount of the E and Z isomers of metaflumizone, wherein the UV absorber is a sulfonic acid derivative of benzophenone having a solubility in water at 20° C. of at least 5.0 g/l; and
wherein the UV absorber is present in an amount that is sufficient to effectively reduce the E/Z isomerization of metaflumizone.
2. The composition according to claim 1 , comprising a further UV absorber, the further UV absorber being oil-soluble.
3. A method of controlling phytopathogenic fungi or undesirable insect or mite infestation, comprising applying the composition according to claim 1 to the fungi or undesirable insects or mites, their habitat, and/or plants or soil to be protected from the fungi or undesirable insects or mite infestation.
4. The method of claim 3 , wherein the amount of the UV absorber is 0.5 to 500 wt. % with respect to the amount of metaflumizone.
5. The method of claim 3 , wherein an antioxidizing agent is used in addition to the UV absorber.
6. The method of claim 5 , wherein the weight ratio of UV absorber to antioxidizing agent is in the range of from 1/10 to 10/1.