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KR-20260066186-A - Method of protecting plants using a mixture containing sulfur and selected terpenes

KR20260066186AKR 20260066186 AKR20260066186 AKR 20260066186AKR-20260066186-A

Abstract

The present invention relates to a method for protecting plants using a mixture comprising sulfur and selected terpenes, as well as a mixture of sulfur and selected terpenes and a fungicidal composition comprising such a mixture.

Inventors

  • 지토 라파엘로
  • 브람 루츠
  • 힐징어 울라
  • 슈트로벨 디터
  • 테게 바네사
  • 리디거 나디네
  • 조바 크리스티안
  • 퀸 아네트
  • 말랑 울리케
  • 피쓰 마르쿠스

Assignees

  • 바스프 에스이

Dates

Publication Date
20260512
Application Date
20240925
Priority Date
20230929

Claims (15)

  1. A method for controlling plant pathogenic fungi selected from the genera Puccinia, Erysiphe, Blumeria, Podosphaera, Septoria, Cercospora, Sclerotinia, Pyrenophora, Ramularia, Fusarium, Venturia, and Diplocarpon, wherein the fungus, the plant or plant part to be protected against fungal attack, and sulfur and limonene, terpinene, pinene, p-cymene, eugenol, geraniol, thymol, and carvacrol, wherein the weight/weight ratio of the combined amount of sulfur to limonene, terpinene, pinene, p-cymene, eugenol, and geraniol is between 25 to 1 and 1 to 2. A method comprising contacting a fungicidally effective amount of a mixture comprising at least one terpene selected from thymol and carvacrol.
  2. In claim 1, a) identifying a plant or a plurality of plants infected or at risk of infection by at least one fungus selected from the genera Puccinia, Erysiphe, Blumeria, Podosphaera, Septoria, Cercospora, Sclerotinia, Pyrenophora, Ramularia, Fusarium, Venturia, and Diplocarpon; and b) the fungus, the plant or plant part to be protected against fungal attack, wherein the weight/weight ratio of the combination amount of sulfur to limonene, terpinene, pinene, p-cymene, eugenol, geraniol, thymol, and carvacrol is between 25 to 1 and 1 to 2, A method comprising the step of contacting a fungicidally effective amount of a mixture comprising at least one terpene selected from eugenol, geraniol, thymol, and carvacrol.
  3. A method according to claim 1 or 2, wherein the mixture comprises limonene.
  4. A method according to claim 3, wherein the weight/weight ratio of the combination amount of limonene to other terpenes is 90 to 1 or greater.
  5. A method according to any one of claims 1 to 4, wherein the fungus to be controlled is derived from a species selected from Puccinia triticina, Puccinia striiformis, Erysiphe graminis, Septoria tritici, Cercospora beticola, Cercospora sojina, Sclerotinia sclerotiorum, Ramularia collo-cygni, Fusarium graminearum, Pyrenophora teres, and Venturia inequalis.
  6. A suspension concentrate or suspension emulsion formulation comprising the following: a) Yellow b) One or more terpenes selected from limonene, terpinene, pinene, p-cymene, eugenol, geraniol, thymol, and carvacrol, c) one or more carrier oils and d) Optional additional components.
  7. In claim 6, a suspension concentrate or suspension emulsion formulation comprising the following: a) 500 to 700 g/L of sulfur, b) 50 to 70 g/L of limonene, terpinene, pinene, p-cymene, eugenol, geraniol, thymol, and carvacrol, c) one or more carrier oils in a total amount of 40 to 180 g/L, and d) Optionally additional components, Here, the amounts of a), b), c), and optionally d) are added up to a volume of 1 liter.
  8. In claim 6 or 7, a suspension concentrate or suspension emulsion formulation as follows: a) The weight/weight ratio of the combination of sulfur versus all terpenes selected from limonene, terpinene, pinene, p-cymene, eugenol, geraniol, thymol, and carvacrol is between 24 to 1 and 2 to 1, or b) The weight-to-weight ratio of the combined amount of sulfur to all carrier oils is between 7:1 and 2:1, or c) The weight/weight ratio of the combination of all terpenes selected from limonene, terpinene, pinene, p-cymene, eugenol, geraniol, thymol, and carvacrol to the combination of all carrier oils is between 1:6 and 1:1, or d) the combination amount of all terpenes selected from limonene, terpinene, pinene, p-cymene, eugenol, geraniol, thymol, and carvacrol and the weight/weight ratio of all carrier oils are between 6:1 and 2:1, or e) The weight/weight ratio of the combination of sulfur to all terpenes selected from limonene, terpinene, pinene, p-cymene, eugenol, geraniol, thymol, and carvacrol is between 24 to 1 and 2 to 1, and the weight/weight ratio of the combination of sulfur to all carrier oils is between 7 to 1 and 2 to 1, or f) The weight/weight ratio of the combination of sulfur to all terpenes selected from limonene, terpinene, pinene, p-cymene, eugenol, geraniol, thymol, and carvacrol is between 24:1 and 2:1, the weight/weight ratio of the combination of sulfur to all carrier oils is between 7:1 and 2:1, and the weight/weight ratio of the combination of all terpenes selected from limonene, terpinene, pinene, p-cymene, eugenol, geraniol, thymol, and carvacrol to the combination of all carrier oils is between 1:6 and 1:1, or g) The weight/weight ratio of the combination of sulfur to all terpenes selected from limonene, terpinene, pinene, p-cymene, eugenol, geraniol, thymol, and carvacrol is between 24:1 and 2:1, the weight/weight ratio of the combination of sulfur to all carrier oils is between 7:1 and 2:1, and the weight/weight ratio of the combination of sulfur to all terpenes selected from limonene, terpinene, pinene, p-cymene, eugenol, geraniol, thymol, and carvacrol and all carrier oils is between 6:1 and 2:1, or h) The weight/weight ratio of the combination of all terpenes selected from limonene, terpinene, pinene, p-cymene, eugenol, geraniol, thymol and carvacrol to sulfur is between 24 to 1 and 2 to 1, the weight/weight ratio of the combination of all carrier oils to sulfur is between 7 to 1 and 2 to 1, the weight/weight ratio of the combination of all terpenes selected from limonene, terpinene, pinene, p-cymene, eugenol, geraniol, thymol and carvacrol to the combination of all carrier oils is between 1 to 6 and 1 to 1, and the weight/weight ratio of the combination of all terpenes selected from limonene, terpinene, pinene, p-cymene, eugenol, geraniol, thymol and carvacrol and all carrier oils to sulfur is between 6 to 1 and 2 to 1.
  9. A suspension concentrate or suspension emulsion formulation according to any one of claims 6 to 8, wherein at least one selected terpene is limonene.
  10. In claim 1, a suspension concentrate or suspension emulsion formulation containing between 5 g and 250 g of limonene per liter.
  11. A suspension concentrate or suspension emulsion formulation according to claim 1 or 10, wherein the weight/weight ratio of sulfur to limonene is between 6 to 1 and 1 to 1.
  12. A suspension concentrate or suspension emulsion formulation according to any one of claims 1 to 11, wherein the weight/weight ratio of the combination amount of limonene to other terpenes is 90 to 1 or higher.
  13. Use of a mixture according to any one of claims 1 to 5 or a suspension concentrate or suspension emulsion formulation according to any one of claims 6 to 12 for controlling plant pathogenic fungi selected from the genera Puccinia, Erysiphe, Blumeria, Podosphaera, Septoria, Cercospora, Sclerotinia, Pyrenophora, Ramularia, Fusarium, Venturia and Diplocarpon.
  14. In claim 13, the use wherein the mixture, suspension concentrate, or suspension emulsion formulation comprises limonene in a weight/weight ratio of sulfur to limonene between 25 to 1 and 1 to 1.
  15. The use according to claim 13 or 14, wherein at least one fungal species to be controlled is selected from Puccinia triticina, Puccinia striiformis, Erysiphe graminis, Septoria tritici, Cercospora beticola, Cercospora sojina, Sclerotinia sclerotiorum, Ramularia collo-cygni, Fusarium graminearum, Pyrenophora teres, and Venturia inequalis.

Description

Method of protecting plants using a mixture containing sulfur and selected terpenes The present invention relates to a method for protecting plants using a mixture comprising sulfur and selected terpenes, as well as a mixture of sulfur and selected terpenes and a fungicidal composition comprising such a mixture. Crop plants face continuous threats from plant pathogens and pests. Therefore, there is a persistent need to develop various alternative insecticides to protect crop plants and address the shortcomings of existing pesticides. One area of interest is the development of insecticides based on natural compounds that exhibit comparable performance and ease of application to similar insecticides based on synthetic compounds. One of the oldest naturally occurring fungicides that is still widely used is elemental sulfur. It is considered to have a very low environmental impact and is one of the few compounds permitted as an insecticide in organic agriculture. Sulfur is primarily used to protect fruits, vegetables, and grapevines against plant pathogenic fungi, mites, and insects, such as aphids. Sulfur fungicides are generally formulated as wettable powders or water-dispersible granules. Sulfur wettable powder formulations generate a significant amount of dust and pose risks to users, mainly due to eye irritation, inhalation hazards, and skin irritation. Granular formulations generate less dust but are more expensive to produce. An improved formulation type is the suspension concentrate. However, aqueous sulfur suspension concentrates frequently precipitate during storage, which is difficult to resuspend and tends to form a supernatant. Sulfur particles formed during storage can clog spray nozzles. Another problem with aqueous suspension concentrates is their low fluidity and high viscosity, which reduce the ease of application for users of these formulations. Variants of aqueous suspension concentrates containing different types of fatty acids or terpene-based plant oils are described in WO03/086073, which describes a composition for controlling grapevine powdery mildew (Uncinula necator) containing a soybean oil emulsion in 40% water and sulfur. Sulfur has limited application in crops such as wheat, barley, rye, triticale, oats, sugar beets, and fodder beets. Although sulfur provides good protection against powdery mildew, such as Blumeria graminis (also known as Erysiphe graminis), it requires a high application rate of 6 to 8 kg per hectare (ha) per treatment. Even at these high application rates, sulfur is insufficient against other plant pathogenic fungi in these crops. Therefore, there is a need to identify methods of sulfur application that improve the protective effect of sulfur-based fungicides against other plant pathogenic fungi in these crops and/or allow for lower application rates per hectare and per year for these crops. Another type of compound used as a natural fungicide is terpenes. Terpenes are a diverse group of natural compounds and are part of many plant essential oils. Their basic structure can be visualized as the result of linking isoprene ( C₅H₅ ) units "head to tail" to form chains and rings. They are further classified according to the amount of isoprene units used in their basic structure. Examples of these subgroups are monoterpenes, sesquiterpenes, and diterpenes. Monoterpenes contain two isoprene units and C₁₀H₆ in their basic structure, while sesquiterpenes contain three, and diterpenes contain four. WO2022/101613 describes a bio-fungicide composition comprising microencapsulated essential oils or isolated terpenes. Despite the fact that sulfur and terpenes have long been used as insecticides, less is known about their combined effects, the conditions for obtaining positive effects, or the conditions for overcoming technical difficulties arising from their combination. WO2019/207112 describes a fungicide mixture of limonene, cinnamaldehyde, and one or more terpinenes, which can be used to replace other fungicides and reduce the amount of other fungicides, such as sulfur and copper, in spraying systems for plant protection. It describes that using a specific terpene mixture in a spraying system has the potential to reduce the total amount of sulfur in the spraying system from 100 to 120 kg per season to 10 to 12 kg. WO2016/004326 discloses a seed, soil, or plant treatment composition comprising one or more essential oils and one or more emulsifiers, wherein one or more essential oils are present as an emulsion and the average particle size of one or more essential oils in the emulsion is less than about 25 microns. WO2016/004326 also describes that this plant treatment composition may be combined with several insecticides, including fungicides such as sulfur. These documents describe the effects of sulfur and terpenes for protecting plants against fungal attacks, but they do not describe how these compounds can be used together without reducing the effect of sulfur on fungi