DE2341882A1 - N and metal salt contg. synergistic insecticide and fungicide - comprising methyl benzimidazole-2-carbamate and aluminium N-nitroso-N-cyclohexylhydroxyl-amine - Google Patents

Abstract

Pesticidal compsns. contg. as active component a mixture of methyl benzimidazole-2-carbamate (BCM) or one of its alkali metal salts and aluminium N-nitroso-N-cyclohexylhydroxylamine (NCH). Synergistic fungicidal and insecticidal compsn. for prevention of attack on wood, for preservation of ind. prods. such as paints, leather, paper, adhesives etc. Pref. salts of BCM are the Na and K salts, esp the Na salt. Pref. ratios of BCM:Al NCH are 1:2 to 1:4.

Description

BASF Aktiengesellschaft 23Λ1882

Our reference: O. Z. 30 059 Sws / G

67OO Ludwigshafen, August 16, 1973

Pesticides

The present invention relates to a pesticide, which contains a mixture of active ingredients, and methods for controlling pests with this mixture.

It is known that salts of N-nitroso-N-cyclohexylhydroxylamine- (NCH) to protect wood against attack by wood-destroying fungi, such as Coniophöra cerebella, Meruli.us lacrimans, Lentinus lepideus et al. Of the salts that are practically insoluble in water, the aluminum salt of the NCH has proven itself; disadvantageous is, however, that relatively high application concentrations are required to protect the wood. It is also disadvantageous that this compound against wood-discolouring fungi, such as Pullularia pullulans and Sclerophoma pityophila ,. in sufficient application concentrations for combating wood-destroying fungi is no longer effective.

It is also known that with the 2-benzimidazole-carbamic acid methyl ester (BCM) can be used to control a large number of fungi, mainly the Ascomycetes and Fungi imperfecti belong to; This compound is used in the usual concentrate against wood-destroying fungi from the Basidiomycete class ions ineffective.

It has now been found that a mixture of the methyl 2-benzimidazole carbamate and the aluminum salt of N-nitroso-N-cyclohexylhydroxylamine are suitable as pesticides

Pests are generally fungi and insects, particularly those fungi and insects that affect wood, wood paints or paints

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-2- O.Z. 30 059

damage.

The pesticides according to the invention have a fungicidal effect that goes beyond the effectiveness of the individual active ingredients Effectiveness on, ie. there is a potentiation of the efficacies. The mixing ratio of the active ingredients can be in one vary over a wide range. For example, at a weight ratio of aluminum salt of the NCH to BCM such as 1: 1 to 10: 1, preferably 2: 1 to 4: 1, achieved an excellent effect against pests.

A paint preservative can contain up to $ 4 (weight percent) aluminum salt of the NCH and up to 1% BCM; an optimal mixture is 2 $ aluminum salt of the NCH and 0.5 $ BCM, based on the total weight of the emulsion paint. This mixture is ideally suited as an additive to emulsion paints for paints in fire rooms to protect against fungal growth.

The following paint discolouring fungi and molds can be combated with the agents according to the invention: Pullularia pullulans, Aspergillus niger, Bispora effusa, Stachybotrys atra, Trichoderma viride, Paecilomyces variotii, Cladosporium herbarum, Sclerophoma pityophila, Chaetomium globosum, Hormiscium spec, Stemphylium spec, Alternaria spec, Phoma violacea; they are also against wood-destroying fungi, such as Merulius lacrimans, Coniophora cerebella, Lentinus lepideus, Poria vaporaria, Lenzites trabea, Paxillus panuoides. Leave the agents according to the invention not only used as fungicidally active components of emulsion paints and as preservatives for paints, but they are also suitable as wood preservatives and for the preservation of technical products such as leather, adhesives, Paper.

The following example shows the effectiveness of the claimed mixture:

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-3- ο.ζ. 30 059

In a plastic emulsion paint containing an aerylic acid ester copolymer as a binder, active ingredient mixtures of the aluminum salt of the NCH and the BCM in the ratios 2: 1, 3: 1 and 4: 1, based on the weight of the active ingredients, are added to the production of mold growth resistant paint films , carefully incorporated in finely ground form. The preservative additives to the emulsion paint are 1.5 to h% (weight percent). For comparison, the individual active ingredients are added to the emulsion paint in amounts of $ 0.5 to $ 3 in the same way. To determine the resistance of the fungicidally treated paint films, 50 × 50 mm and 1 mm thick pinewood boards (veneers) are evenly coated with the emulsion paints. After the paint film has dried on, the tablets are placed in Petri dishes on organic malt nutrient agar and sprayed with a suspension of fungal spores. Fungi are used that can appear on paintwork: Pullularia pullulans, Sclerophoma pytiophila, Trichoderma viride, Penicillium funicolosutn, Alternaria tenus, Stemphylium spec, Cladosporium herbarum. The Petri dishes are set up at room temperature and the extent of fungus development on the paint films is assessed after 2, 4 and β weeks. The test results listed in the table below show the superior fungicidal effectiveness of the active ingredient mixtures in comparison with the individual active ingredients.

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O.Z. 30 059

Emulsion paint Amount of active ingredient added in % Al salt of the NCH

BCM fungus development on the paint film after weeks

2 weeks 4 weeks 6 weeks

0.5
0.5
1
2 O O O O 1
0
0
0 1
1
0
0 1
1.5
2
3 O OOO 1
1
1
0 3
3
2
1 1
1.5
2
3 0.5
1 1
0 ro ro 3 x
3 x (without active ingredient) 2 4th 5 control

χ Predominantly Alternaria and Trichoderma

0 = surface free of fungal growth, graduated up to

5 = surface completely overgrown by fungi

509811/1166 -5-

Claims (2)

-5 O.Z. 30 059 claims 1. Pest Control Agent !, containing a mixture of the 2-Benzimidazole-carbamic acid methyl ester and the aluminum salt of N-nitroso-N-cyclohexy! hydroxy! amine. 2. Use of a mixture according to claim 1 as a protective agent for wood paints or paints. BASF Aktiengesellschaft 509811/1166