# US 2019/0166845 A1 · Methods of treatment and prevention of white spot in maize crops

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- Number: US 2019/0166845 A1
- Document ID: US20190166845A1
- Status: Published application
- Kind: A1
- Application number: 16/323,144
- Filed: 2017-08-02
- Published: 2019-06-06
- Earliest claimed: 2016-08-04
- Applicants: UPL Limited
- Inventors: Gilson Aparecido Hermenegildo De OLIVEIRA; Vicente Amadeo GONGORA; Florindo ORSI, Jr.; Carlos Eduardo FABRI; Jaidev Rajnikant SHROFF; Vikram Rajnikant SHROFF
- Web page: https://patentgrep.com/patent/US20190166845A1

## CPC

- A01N 47/14: Di-thio analogues thereof
- A01N 43/54: 1,3-Diazines; Hydrogenated 1,3-diazines
- A01N: PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF (preservation of food or foodstuff A23); BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES (preparations for medical, dental or toiletry purposes which kill or prevent the growth or proliferation of unwanted organisms A61K); PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS

## Abstract

The present invention relates to a method of treating Phaeosphaeria leaf spot (PLS) or White spot. The method comprises treating the host crop with a combination of a dithiocarbamate and a Qo inhibitor fungicide and optionally a third fungicide selected from a contact or systemic fungicide.

## Claims

### Claim 1

A method of treating white spot infection in a host plant, said method comprising treating the host plant at the locus of the infection with a dithiocarbamate fungicide, and prior to, concurrently or subsequently to treating with the dithiocarbamate fungicide, treating the host plant with a Qo inhibitor.

### Claim 2 (depends on 1)

The method of in claim 1, wherein the dithiocarbamate fungicide is selected from maneb, metiram, mancozeb, zineb, ziram, thiram, propineb, and nabam.

### Claim 3 (depends on 2)

The method of as claimed in claim 2, wherein the dithiocarbamate fungicide is mancozeb.

### Claim 4 (depends on 1)

The method of in claim 1, wherein the Qo inhibitor fungicide is selected from fenamidone, famoxadone, azoxystrobin, mandestrobin, coumoxystrobin, enoxastrobin, flufenoxystrobin, pyraoxystrobin, dimoxystrobin, enestrobin, fluoxastrobin, kresoxim-methyl, metominostrobin, orysastrobin, picoxystrobin, pyrametostrobin, triclopyricarb, fenaminstrobin, pyraclostrobin, and trifloxystrobin.

### Claim 5 (depends on 4)

The method of in claim 4, wherein the Qo inhibitor fungicide is selected from azoxystrobin, pyraoxystrobin, pyraclostrobin, trifloxystrobin, and or a mixtures thereof.

### Claim 6

A method of treating white spot infection in a host plant, said method comprising treating the host plant at the locus of the infection with a dithiocarbamate fungicide, a Qo inhibitor, and a third fungicide selected from a contact or a systemic fungicide.

### Claim 7 (depends on 6)

The method of in claim 6, wherein the said contact fungicide is selected from copper fungicides, sulfur fungicides, phthalimide fungicides, chloronitrile fungicides, sulfamide fungicides, guanidine fungicides, triazines fungicides, and quinone fungicides.

### Claim 8 (depends on 6)

The method of claim 6, wherein, the said systemic fungicide is selected from a demethylation inhibitor and a succinate dehydrogenase inhibitor.

### Claim 9

A method of treating/controlling white spot infection comprising treating a host plant at the locus of the infection with a composition comprising a dithiocarbamate and a Qo inhibitor fungicide.

### Claim 10 (depends on 9)

The method of in claim 9, wherein the dithiocarbamate is mancozeb.

### Claim 11 (depends on 9)

The method of in claim 9, wherein, the Qo inhibitor is selected from azoxystrobin, picoxystrobin, pyraclostrobin, and trifloxystrobin.

### Claim 12 (depends on 9)

The method of in claim 9, wherein the dithiocarbamate is mancozeb and the Qo inhibitor is azoxystrobin.

### Claim 13 (depends on 9)

The method of in claim 9, wherein the composition is selected from a solution, an emulsion, a wettable powder, a water-based suspension, an oil-based suspension, a water-based suspension concentrate, an oil-based suspension concentrate, a powder, a dusting product, a paste, a soluble powder, a granule, a dispersible granule, a soluble granule, a granule for broadcasting, a suspension-emulsion concentrate, or an encapsulation.

### Claim 14

A method of preventing white spot in maize infection in a host crop, comprising applying to the locus of possible infection a dithiocarbamate fungicide, and concurrently or subsequently to the dithiocarbamate fungicide, applying a Qo inhibitor, such that the application is carried out in the absence of pest pressure, in a seasons when the host crop is dormant or in debris of crops accumulated over the season.