GB2191401A

GB2191401A - Fungicides

Info

Publication number: GB2191401A
Application number: GB08713348A
Authority: GB
Inventors: Ulrich Gisi; Hans Wiedmer
Original assignee: Sandoz AG
Current assignee: Sandoz AG
Priority date: 1986-06-12
Filing date: 1987-06-08
Publication date: 1987-12-16
Anticipated expiration: 2007-06-08
Also published as: IT8748046A0; BE1001743A4; GB8614367D0; DK295787D0; AU7406887A; DE3718695A1; AU599986B2; GB8713348D0; ZA874258B; IE60413B1; SE468233B; HU206599B; IT1216820B; SE8702422D0; IE871544L; GB2191401B; DE3718695C2; DK295787A; CA1329117C; FR2599942B1

Description

1 GB 2 191401 A 1

SPECIFICATION

Improvements in or relating to fungicides The present invention relates to fungicides. 5 The invention provides a method of combatting fungal diseases in plants, with the aid of a) the compound of formula 1 /N- cl "-CH 2-N 1 10 C (CH N 3 hereinafter referred to as -Compound A-, and b) the compound of formula 11 15 N Cl- O-CH2 -CH2-N- 0 tHC -N L7 -CH 20 2 3 hereinafter referred to by its common name -prochloraz-.

Compound A is a known fungicide, effective in the combatting of fungi in crops such as cereals including rice, especially in wheat and barley; it has excellent activity against rusts (such 25 as Puccinia spp.) and good activity against powdery mildews (such as Erysiphe), Septoria and Rhizoctonia. Prochloraz is a known fungicide having good activity against Pseudocercosporella, Septoria, Pyrenophora, powdery mildews and Pyricularia.

It has now been found that the use of prochforaz in combination with Compound A is surprisingly effective in the combatting of fungi. The combination is particularly suitable for full 30 season use against foot diseases, leaf diseases and ear diseases, particularly foot diseases in cereals.

Accordingly, the invention provides an improved method of combatting fungal diseases in plants, especially in cereals (including rice), which particularly in wheat and barley, comprises applying to the plants, in admixture or separately, Compound A and prochloraz in an effective 35 aggregate amount. The method shows an excellent plant tolerance. More than additive effect is La. observed against Septoria in wheat and Helminthosporium in barley.

Suitable application rates are 50 to 100 9, particularly 60 to 80 g of Compound A per hectare and 250 to 500 g, particularly 300 to 450 g of prochloraz per hectare of crop locus. The weight ratio of Compound A: prochloraz preferably lies in the range of 1: 2 to 1: 8, more 40 preferably of 1: 3.5 to 1: 8, particularly of 1: 3.75 to 1: 6. Examples of suitable weight ratios of Compound A: prochloraz are 1: 3.75, 1: 5 and 1: 7.5. The compounds are preferably applied in spray form employing in general an application volume of from 0.05 to 0.5 hI per hectare, e.g. from 0.05 to 0. 1 hI for airial application and from 0.2 to 0.4 hi for conventional ground application. 45 The invention also provides a fungicidal composition comprising Compound A and prochloraz, preferably in the weight ratio as defined above.

The composition of the invention may be formulated in any conventional form, for example in the form of a twin packet, or of an emulsifiable concentrate, wettable powder or water dispersi ble granule, the emulsifiable concentrate form being preferred. Such compositions may be pro- 50 duced in conventional manner, e.g. by mixing Compound A and prochloraz with appropriate adjuvants such as diluents and optionally other formulating ingredients such as surfactants.

The term diluent as used herein means any liquid or solid agriculturally acceptable material-in cluding carriers-which may be added to the active constituents to bring them in an easier or improved applicable form, respectively, to a usable or desirable strength of activity. It can for 55 example be talc, kaolin, diatomaceous earth, xylene, or water.

Particularly formulations to be applied in spraying forms such as water dispersible concentrates or wettable powders my contain surfactants such as wetting and dispersing agents, e.g. the condensation product of formaldehyde with naphthalene sulphonate, an alkylaryisulphonate, a lignin sulphonate, a fatty alkyl sulphate, an ethoxylated alkylphenol and an ethoxylated fatty 60 alcohol.

In general, the formulations include from 0.01 to 90% by weight of active agent, from 0 to 20% agriculturally acceptable surfactant and 10 to 99.99% solid or liquid adjuvant(s), the active agent consisting of the Compound A, prochloraz and optionally other active agents.

Concentrate forms of compositions generally contain between about 2 and 80%, preferably 65 2 GB 2 191401 A 2 between about 5 and 70% by weight of active agent. Application forms of formulation may for example contain from 0.01 to 45% by weight.

The invention is illustrated by the following examples, wherein parts and percentages are by weight.

5 Emulsifiable Concentrates Composition A B Compound A techn. (95.5%) 6.2 8.2 Prochloraz techn. (97.4%) 29.7 29.7 EmulsifierM 15.0 15.0 10 Solvent(2) 49.1 47.1 Total 100 100 (1) e.g. a mixture of 7 parts of a mixture of oxyethylated triglyceride with branched calcium alkyl 15 aryl sulphonate in iso-butanol and 8 parts of tributyl phenol polyglycol ether. (2) e.g. a mixture of 15 parts propyleneglycol monomethylether and 34.1 parts (for Composition A) or 32. 1 parts (for Composition B) of xyiene.

Claims

CLAIMS 20

1. A method of combatting fungal diseases in plants which comprises applying to the plants, in admixture or separately, a) the compound of formula 1 and OH N- 25 Cl-(0CH-CH2) N \--.N I H (CH 3 A b) the compound of formula 11 30 :jN cl O-CH -CH 2 2 H H -CH 35 2 3 in a fungicidally effective aggregate amount.

2. The method of Claim 1, which comprises applying from 50 to 100 9 of the compound of formula 1 and from 250 to 500 9 of the compound of formula 11 per hectare of plant locus. 40

3. The method of Claim 2, which comprises applying from 60 to 80 9 of the compound of formula 1 and from 300 to 450 9 of the compound of formula 11 per hectare of plant locus.

4. The method of Claims 1 to 3, wherein the plants are cereals.

5. The method of Claim 4, in which the cereal is wheat.

6. The method of Claim 5, for combatting Septoria in wheat. 45

7. The method of Claim 4, in which the cereal is barley.

8. The method of Claim 7, for combatting Helminthosporium in barley.

9. A fungicide comprising the compounds of formula 1 and 11, stated in Claim 1, and a diluent.

10. The fungicide of Claim 9, wherein the weight ratio of the compound of formula 1 50 compound of formula 11 is in the range of from 1: 2 to 1: 8.

11. The fungicide of Claim 10, wherein the weight ratio is from 1 3.5 to 1: 8.

12. The fungicide of Claim 11, wherein the weight ratio is from

1 3.75 to 1: 6.

Printed for Her Majesty's Stationery Office by Burgess & Son (Abingdon) Ltd, Dd 8991685, 1987.

Published at The Patent Office, 25 Southampton Buildings, London, WC2A 1 AY, from which copies may be obtained.