FR2668032A1 - Process for the insecticidal treatment of stored grain using an alkyl isothiocyanate in gaseous form - Google Patents
Process for the insecticidal treatment of stored grain using an alkyl isothiocyanate in gaseous form Download PDFInfo
- Publication number
- FR2668032A1 FR2668032A1 FR9013100A FR9013100A FR2668032A1 FR 2668032 A1 FR2668032 A1 FR 2668032A1 FR 9013100 A FR9013100 A FR 9013100A FR 9013100 A FR9013100 A FR 9013100A FR 2668032 A1 FR2668032 A1 FR 2668032A1
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- grains
- gaseous form
- stored grain
- alkyl isothiocyanate
- stored
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N47/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid
- A01N47/40—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid the carbon atom having a double or triple bond to nitrogen, e.g. cyanates, cyanamides
- A01N47/46—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid the carbon atom having a double or triple bond to nitrogen, e.g. cyanates, cyanamides containing —N=C=S groups
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- Life Sciences & Earth Sciences (AREA)
- Agronomy & Crop Science (AREA)
- Pest Control & Pesticides (AREA)
- Plant Pathology (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Dentistry (AREA)
- General Health & Medical Sciences (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Environmental Sciences (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
Description
La présente invention concerne un procédé de traitement insecticide de grains stockés. The present invention relates to a method of insecticidal treatment of stored grains.
Les insectes (Coléoptères, Lépidoptères) provoquent des pertes importantes au cours du stockage des graines, notamment en zone tropicale. Insects (Coleoptera, Lepidoptera) cause significant losses during the storage of seeds, especially in tropical areas.
Le contrôle des populations d'insectes dans les stocks de graines pose de nombreux problèmes en raison de son coût et de ses difficultés d'emploi surtout au niveau des petits stocks villageois.Controlling insect populations in seed stocks poses many problems due to its cost and employment difficulties, especially in small village stocks.
Bien qu'il existe de nombreux moyens de lutte contre les insectes des grains, en particulier des mesures préventives ou des mesures au niveau du traitement des grains à l'emmagasinage, les procédés permettant le traitement des grains stockés sont en fait assez peu nombreux. Although there are many means of controlling grain insects, in particular preventive measures or measures in the treatment of grains in storage, the methods allowing the treatment of stored grains are in fact quite few.
Tout d'abord, certains moyens mécaniques et physiques tels que la ventilation ou les modifications de température sont susceptibles de tuer ou du moins d'écarter certains insectes, mais il s'agit lâ évidemment de moyens très insuffisants. First of all, certain mechanical and physical means such as ventilation or temperature changes are capable of killing or at least removing certain insects, but these are obviously very insufficient means.
Seuls les fumigants (agissant à l'état gazeux) sont susceptibles de diffuser dans les masses importantes de grains et de pénétrer à l'intérieur des grains. Ces produits sont très efficaces, aussi bien sur les larves que sur les oeufs cachés, et en fait ne laissent que très peu ou pas de résidus. Only fumigants (acting in the gaseous state) are capable of diffusing into large masses of grains and penetrating inside the grains. These products are very effective, both on larvae and on hidden eggs, and in fact leave very little or no residue.
Toutefois, il convient de remarquer que parmi les fumigants utilisables seul le phosphure d'aluminium donne satisfaction, or il stagit là d'un produit très toxique pour l'homme et qui ne peut être utilisé que dans des conditions bien déterminées, lesquelles sont d'ailleurs fixées par voies légales. However, it should be noted that among the fumigants which can be used only aluminum phosphide is satisfactory, yet it is a product very toxic to humans and which can only be used under well-defined conditions, which are d 'elsewhere fixed by legal channels.
Dans ces conditions, on peut constater que le traitement des grains stockés dans des enceintes afin de tuer les insectes et/ou de prévenir leur venue est, pour l'instant, très difficile à mettre en oeuvre. Under these conditions, it can be seen that the treatment of the grains stored in enclosures in order to kill the insects and / or prevent their arrival is, for the moment, very difficult to implement.
La présente invention concerne un procédé de traitement insecticide des grains stockés, caractérisé en ce qu'on soumet lesdits grains stockés, en milieu confiné ou semi-confiné, à l'action d'isothiocyanate d'alkyle sous forme gazeuse. The present invention relates to a method of insecticide treatment of stored grains, characterized in that said stored grains are subjected, in a confined or semi-confined environment, to the action of alkyl isothiocyanate in gaseous form.
On peut, en effet, obtenir des résultats de traitements insecticides très satisfaisants sur des grains stockés en utilisant l'isothiocyanate de méthyle sous forme gazeuse, le produit étant lui-même placé dans ou à proximité du stock, sous une forme solide. It is, in fact, possible to obtain very satisfactory results from insecticidal treatments on stored grains using methyl isothiocyanate in gaseous form, the product itself being placed in or near the stock, in solid form.
L'isothiocyanate de méthyle est un produit qui se sublime, ceci présente l'avantage de ne pas imprégner les grains avec une substance liquide, comme cela est réalisé avec certains types d'insecticide, et d'autre part d'avoir "une forme retard" puisque la sublimation prend un certain temps ce qui permet une action prolongée des vapeurs de l'isothiocyanate de méthyle sur les grains. Methyl isothiocyanate is a product which sublimates, this has the advantage of not impregnating the grains with a liquid substance, as is done with certain types of insecticide, and on the other hand of having "a form delay "since sublimation takes a certain time which allows a prolonged action of the vapors of methyl isothiocyanate on the grains.
D'autre part, l'isothiocyanate de méthyle qui est connu en solution pour présenter des propriétés insecticides n'a, semble-t-il, jamais été proposé dans ce type d'application, à savoir la fumigation des grains stockés. L'avantage de ce produit est que 1' on sait, car il s'agit là d'un produit connu depuis fort longtemps et utilisé largement, qu'il ne développe aucune toxicité particulière et peut donc être utilisé par n'importe qui, sans avoir les contraintes du phosphore d'aluminium par exemple. On the other hand, methyl isothiocyanate which is known in solution to exhibit insecticidal properties has, it seems, never been proposed in this type of application, namely the fumigation of stored grains. The advantage of this product is that we know, because it is a product known for a very long time and widely used, that it does not develop any particular toxicity and can therefore be used by anyone, without having the constraints of aluminum phosphorus for example.
Ce produit est en outre un produit bon marché, qui est particulièrement adapté pour les traitements insecticides des grains stockés dans les pays en voie de développement. This product is also a cheap product, which is particularly suitable for insecticide treatments of grains stored in developing countries.
Ainsi on a pu montrer que le produit sous forme volatile à faible dose présentait au laboratoire des effets insecticides (10 ppm en
DL50 sur 24 heures contre - des Coléoptères Bruchidae,
Acanthoscelides obtectus (bruche du haricot)
Bruchidius atrolineatus et Callosobruchus maculatus
(bruches du niébé)
Caryedon serratus (bruche de l'arachide)
. Bruchus pisorum (bruche du pois)
. Bruchus rufimanus (bruche des fèves), - des Coléoptères Tenebrionidés et Curculionidés ravageurs des grains, - des teignes de la farine (Lépidoptères),
Ephestia kuehniella et Plodia interpunctella. It was thus possible to show that the product in volatile form at low dose exhibited insecticidal effects in the laboratory (10 ppm in
24 hour LD50 against - Bruchidae Beetles,
Acanthoscelides obtectus (bean weevil)
Bruchidius atrolineatus and Callosobruchus maculatus
(cowpea beetles)
Caryedon serratus (peanut weed)
. Bruchus pisorum (pea beetle)
. Bruchus rufimanus (broad beans), - Tenebrionidae and Curculionidae pests of grain pests, - Moths of flour (Lepidoptera),
Ephestia kuehniella and Plodia interpunctella.
C'est dire que son spectre d'activité correspond fort bien à la plupart des ravageurs des graines stockées. This means that its activity spectrum corresponds very well to most of the pests of stored seeds.
Parmi les graines stockées qui peuvent être traitées, il faut citer - les graines de céréales, - les pois, - les arachides, par exemple. Among the stored seeds which can be treated, mention should be made of - cereal seeds, - peas, - peanuts, for example.
Bien qu'il soit possible de prévoir des compositions particulières destinées aux fumigations, ceci n'est pas indispensable, en effet l'utilisation de l'isothiocyanate de méthyle sous forme de plaquette, de pastille ou même de paillettes par exemple peut être amplement suffisante et donner des résultats parfaitement satisfaisants, ce qui diminue encore le prix de revient du traitement insecticide global. Although it is possible to provide specific compositions intended for fumigation, this is not essential, in fact the use of methyl isothiocyanate in the form of wafers, lozenges or even flakes for example may be more than sufficient. and give perfectly satisfactory results, which further reduces the cost of the overall insecticide treatment.
Le nouveau procédé en cause peut être mis en oeuvre aussi bien en milieu confiné, c'est-à-dire dans des silos, que dans des milieux semi-confinés, c'est-à-dire éventuellement des silos non totalement étanches, en effet même si l'isothiocyanate de méthyle est évacué vers l'extérieur, ce produit n'étant pas toxique et étant biodégradable, il ne causera aucun dommage à l'environnement. I1 est également possible de prévoir d'autres traitements tels que la fumigation sous bâche ou bien le traitement des sacs de grains. The new process in question can be implemented both in a confined environment, that is to say in silos, and in semi-confined environments, that is to say possibly in silos that are not completely sealed, effect even if the methyl isothiocyanate is evacuated towards outside, this product not being toxic and being biodegradable, it will not cause any damage to the environment. It is also possible to provide other treatments such as fumigation under tarpaulin or the treatment of bags of grain.
Les conditions particulières de traitement seront, bien entendu, fonction de l'environnement mais pour ce type de produit un surdosage n'est pas à craindre. The particular conditions of treatment will, of course, depend on the environment but for this type of product an overdose is not to be feared.
Pour ce qui concerne la préparation de l'isothiocyanate de méthyle ou des isothiocyanates d'alkyle, il s'agit là de produits qui sont connus depuis fort longtemps, il n'y a donc pas lieu de revenir sur leur préparation et ils sont disponibles dans le commerce. Regarding the preparation of methyl isothiocyanate or alkyl isothiocyanates, these are products which have been known for a very long time, there is therefore no need to review their preparation and they are available in trade.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9013100A FR2668032A1 (en) | 1990-10-23 | 1990-10-23 | Process for the insecticidal treatment of stored grain using an alkyl isothiocyanate in gaseous form |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9013100A FR2668032A1 (en) | 1990-10-23 | 1990-10-23 | Process for the insecticidal treatment of stored grain using an alkyl isothiocyanate in gaseous form |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2668032A1 true FR2668032A1 (en) | 1992-04-24 |
Family
ID=9401473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR9013100A Withdrawn FR2668032A1 (en) | 1990-10-23 | 1990-10-23 | Process for the insecticidal treatment of stored grain using an alkyl isothiocyanate in gaseous form |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2668032A1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR795659A (en) * | 1934-11-06 | 1936-03-19 | Ernst Freyberg Chem Fab Deliti | Process for the destruction of weevils and other agents harmful to the grain supply |
| GB473769A (en) * | 1936-05-08 | 1937-10-20 | Hans Haag | Process for the production of a preparation for the destruction of vermin |
| DE856972C (en) * | 1950-08-17 | 1952-11-24 | Bayer Ag | Protective agent |
| FR2530417A1 (en) * | 1982-07-21 | 1984-01-27 | Showa Denko Kk | SOLID PESTICIDE COMPOSITION IN POWDER OR PELLETS |
-
1990
- 1990-10-23 FR FR9013100A patent/FR2668032A1/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR795659A (en) * | 1934-11-06 | 1936-03-19 | Ernst Freyberg Chem Fab Deliti | Process for the destruction of weevils and other agents harmful to the grain supply |
| GB473769A (en) * | 1936-05-08 | 1937-10-20 | Hans Haag | Process for the production of a preparation for the destruction of vermin |
| DE856972C (en) * | 1950-08-17 | 1952-11-24 | Bayer Ag | Protective agent |
| FR2530417A1 (en) * | 1982-07-21 | 1984-01-27 | Showa Denko Kk | SOLID PESTICIDE COMPOSITION IN POWDER OR PELLETS |
Non-Patent Citations (2)
| Title |
|---|
| CHEMICAL ABSTRACTS, vol. 24, no. 14, julliet 1930, page 3595, dernière ligne - page 3596, premier alinéa, Columbus, Ohio, US; R. ROARK et al.: "Tests of various aliphatic compounds as fumigants" & AGR. TECH. BULL. 162, 1-52(1930) * |
| JOURNAL OF ECONOMIC ENTOMOLOGY, vol. 73, no. 2, avril 1980, pages 321-323, College Park, US; J.F. CARROLL et al.: "Bioassay of three isothiocyanates as fumigants against larvae of a Caribbean fruit fly and the apple maggot" * |
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| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |