FR2514998A1 - PESTICIDE FORMULATIONS FOR SPRAYING FROM AIRCRAFT - Google Patents

Abstract

THE SUBJECT OF THE PRESENT INVENTION IS PESTICIDE FORMULATIONS INTENDED TO BE SUSPENSIONED OR DISSOLVED IN WATER AND TO BE DISTRIBUTED BY AIRCRAFT. IT IS IN THE FORM OF: A. ONE OR MORE PESTICIDE FORMULATIONS IN THE FORM OF A WET POWDER, SUSPENSION OR SOLUTION CONTAINING SURFACTANTS, WETTING AGENTS, DISPERSANTS, ANTI-EVAPORATION AGENTS AND VEHICLES OR SUPPORTS: 90 TO 99 IN WEIGHT; B. SODIUM POLYMETHACRYLATE WITH A MOLECULAR WEIGHT OF BETWEEN 5000 AND 90,000: 10 TO 1 BY WEIGHT.

Description

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  PESTICIDE FORMULATIONS INTENDED TO BE PULVERIZED

FROM AIRCRAFT

  The present invention relates to pesticide formulations in a single package intended to be sprayed from aircraft, after

  have been suspended in water. More specifically, the invention

  The purpose of this invention is to provide formulations in the form of aqueous solutions or suspensions or powders which, once dispersed or diluted in water, can be sprayed from aircraft without giving rise to

  to a "training" effect by the wind.

  As is known, during the spraying of crops

  firing of aircraft by aqueous solutions or suspensions, it is necessary that the formulations distributed by the aircraft, are not driven by the action of the wind, or as a result of the weight loss of the droplets resulting from evaporation of solvent during their fall which, by

  consequently leads to a scattering of the said formulations on

  faces that should not be processed.

  It is also necessary that the droplets, once they have

  dyes their target, adheres perfectly to the vegetation and covers it in the most uniform way possible by forming a film and this in the

quantities required.

  In accordance with current practice, the suspension or solution of pesticide agents to be dispensed by an aircraft is formed by extemporaneous addition to the aqueous suspensions of the selected formulations.

  of products based on cellulose derivatives or polyvinyl alcohol.

  All these additives, however, have the disadvantage of swelling or solubilizing after a time and form agglomerates and sediments that often clog the nozzle distribution; they present,

  Moreover, the disadvantage of giving rise to low coverage or

  the surface to be treated by spraying because of the dimensions

important droplets.

  The present invention relates to a process for providing a formulation which can be dispersed or dissolved directly in water without the need for addition of other ingredients and which does not give rise to

  during the spraying of the product with aircraft, to an "effect of

  The present invention also relates to a formulation which

  does not increase the size of the droplets when they are distributed.

  misted or sprayed by airplane.

  The present invention further relates to a formulation intended to be sprayed by aircraft which neither swells nor gives rise to agglomeration or deposits, and which is sufficiently stable over time so that its suspension in water can be independent of time,

  that is to say, can take place at any time, whether it is

  before treatment as well as a few hours before

treatment.

  Another subject of the present invention is formulations capable of

  can be easily dispersed in water before being sprayed on

  aircraft cultures, which contain all the appropriate ingredients

  development of the desired pesticidal action, giving good adhesion to the vegetation, good uniformity of spraying and avoiding that part of the material is entrained or evaporated during

spraying.

  Other objects and advantages of the present invention will become apparent

  on reading the following description and in particular the formulations

  according to the present invention which are formed: a. one or more pesticidal compositions in the form of a moisturizing powder, a suspension, an emulsion or a solution

  also containing surfactants, moisturizing agents and

  conventional dispersion, dispersion and anti-evaporation as well as vehicles or other carriers 90 to 99% by weight; b. sodium polymethacrylate having a molecular weight of from 1,000 to 90,000 to 1% by weight. The pesticides a) likely to be present in the composition are known pesticides such as: zinc ethylene-bis-dithiocarbamate

  and / or manganese; copper oxychloride, N- (trichloromethylthio) -

  phthalimide, N- (trichloromethylthio) -cyclohexene-4-1,2-dicarboxymide,

  N-dodecylguanidine acetate, sulfur, dinitro- (1-methyl-heptyl) -phenyl-

  crotonate, dinitro- (1-methoxycarbonylethyl) acetamide, N- (3,5-dichlorophenyl)

  methyl-5-carboethoxy-oxyazoline-2,4-dione, dimethyldithiocarbamate

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  zinc, zinc propylene bis-dithiocarbamate and other substances and / or

  langes of these compounds; as anti-evaporation agents can be

  polyoxyethylated lauryl alcohol, glycerol, etc. or their

  diapers; as humidifying agents can be used the dode-

  sodium cylbenzenesulphonate, sodium sulfosuccinate; as

  dispersants can be used lignin sulphonate, lignin

  calcium sulphonate, ammonium lignin sulphonate, aluminum lignin sulphonate and other similar substances or mixtures thereof; as supports can be used: kaolin, celite, water, talc,

  diatomite, etc. It is essential that formulations can be perfectly

  suspended or emulsified in water if they are not

  already in the form of an aqueous solution.

  Sodium polymethacrylate b), having a molecular weight of between 5,000 and 90,000, is soluble in water. The formulations according to the present invention contain in a single package components a) and b); they are dispersed in water immediately before spraying in an amount of between 3% and about 30% by weight and are sprayed on the target to be treated by the use of, for example, a helicopter provided with a device dispensing system comprising a container, a pump and a dispensing element consisting of a head

  or bar having nozzles or nozzles arranged at a perpendicular angle

  the axis of movement of the helicopter or other suitable aircraft.

to this end.

  Other objects and advantages of the present invention will become apparent

at the next reading.

EXAMPLE

  In order to determine the rate of anti-training effect, we trace on

  the ground a band corresponding to the projection of the rod carrying the tuyè-

  the helicopter from which the suspension will be sprayed On the center line of this strip, directional signals are placed for the helicopter pilot to maintain the aircraft along the center line of this band. The width of this band is equal to 20 meters

  and its length is of the order of 1 km On this strip, are placed at

  Regular intervals, glass plates to determine the coverage or coating that can be achieved by the formulation The strip is then widened by 2 m on each side so as to form a second band 24 m wide on which are arranged at intervals glass plates which are not aligned with those of the central strip. This second band is used to determine the

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  training On the glass plate placed on the ground and on the vegeta-

  In addition to the existing coverage, both the visual effect and the incorporation into the suspension of the Wood light-sensitive tracer formulation are verified. The helicopter moves to a height of 10 meters above ground level. of the first band along the aforementioned signals. The tested pesticide formulations have the following compositions: In accordance with the invention According to the state of the art A Humidifying powder M Humidifying powder consisting of (in percent by weight)

  ethylene-bis-dithiocarba ethylene-bis-dithiocarba-

zinc mate 65 zinc mate 65

  Poly Lauryl Alcohol Poly Lauryl Alcohol

  oxyethylated 5-oxyethylated sodium dodecylbenzene sulfonate sodium dodecylbenzene sulfonate 5 sodium lignin sulfonate 5 sodium lignin sulfonate sodium polymethacrylate 1-10 kaolin, sufficient kaolin, sufficient to obtain 100% with extemporaneous mixing of

dihydroxyethylcellulose (ie

  at the time of use) Aqueous suspension N Concentrated concentrated aqueous suspension consisting of (consisting of (weight percent weight percent) by weight)

  ethyl ne-bis-dithiocarba ethyl ne-bis-dithiocarba-

  manganese mate 40 manganese mate 40

  Poly Lauryl Alcohol Poly Lauryl Alcohol

  oxyethylated 5 sodium oxyethyl 5 sodium sulfosuccinate 3 sodium sulfosuccinate 3 ammonium lignin sulfonate 5 lignin ammonium sulfonate 5 sodium polymethacrylate 1-10 water, sufficient water, sufficient for 100 per cent with extemporaneous addition of polyvinyl alcohol (at the time the use of the said formulation)

  The A powders are subdivided into AI containing 2% polymetallic

  sodium crylate, A 2 containing 3%, etc. to A containing 10% of

  polymethacrylate It was the same for B, M and N, the latter

  holding 1 to 10% hydroxyethylcellulose or polyvinyl alcohol.

  The spraying is carried out, as described above, by dispersion of the formulations in water in a proportion of 2 or 3%,

  immediately before the flight of the helicopter.

  It is observed that the formulations containing the sodium polymethacrylate (series A and B) are suspended without any difficulty while the formulations containing the cellulose and polyvinyl alcohol derivatives form agglomerates and swell in such a way that a long duration is required for the preparation of the suspension as well as

continuous mixing.

  The distribution or spraying of the formulations is obtained at

  with a stem 14 meters long placed at a perpendicular angle

  at the helicopter line and equipped with 70 nozzles

  1.5 mm in diameter arranged 20 cm apart from each other.

  With the suspensions obtained from formulations A and B,

  has never noticed appreciable "training" (at most 1 to 2

  beyond the 20-meter limit of the central strip), while vegetation and glass plates are also covered

  uniformity by the droplets of suspension, and that we have never

state of closure of the nozzles.

  Satisfactory results are obtained when the formulations according to the present invention are used.

  compositions containing the other pesticides listed above.

  On the other hand, when using the M and N suspensions, a drive can be obtained that can even reach 25 meters beyond the set meter limit. The coverage was not very uniform and insufficient because of the evaporation of water that occurs during the

  spray droplets and also because it occurs (especially

  for suspensions M) a plugging of the distribution nozzles.

Claims (13)

REVENDI CATIONS   1. Pesticidal formulations intended to be suspended or dissolved in water in quantities of between 3 and 30% by weight,   and to be distributed using aircraft without having any effect of   by wind and without any difficulty of dispersion, consisting of: one or more pesticidal formulations in the form of a moisturizing powder, suspension or solution   containing surfactants, human agents,   midification, dispersants, anti-evapo-   and carriers or carriers 90 to 99% by weight of sodium polymethacrylate having a molecular weight of from 5,000 to 90,000 to 1% by weight 2. Formulations according to claim 1, characterized in that   the pesticide is zinc ethylene-bis-dithiocarbamate, ethylene-bis-   manganese dithiocarbamate, zinc ethylenebis-dithiocarbamate and of manganese.   3. Formulations according to claim 1, characterized in that   the pesticide is copper oxychloride.   Formulations according to claim 1, characterized in that   the pesticide is N- (trichloromethylthio) phthalimide.   5. Formul ations according to claim 1, characterized in that   the pesticide is N- (trichloromethylthio) -cyclohex-4-ene-1,2dicarboximide.   Formulations according to claim 1, characterized in that   the pesticide is N-dodecylguanidine acetate.   Formulations according to claim 1, characterized in that the pesticide is sulfur.   Formulations according to claim 1, characterized in that   is dinitro- (1-methyl-heptyl) -phenylcrotonate.   9 formulations according to claim 1, characterized in that   the pesticide is dinitro- (1-methyl-heptyl) -phenol.   Formulations according to claim 1, characterized in that   the pesticide is 2-phenyl-N- (2,6-dimethylphenyl) -N (1methocarbonylethyl) -   acetamide. Formulations according to claim 1, characterized in that   the pesticide is N- (3,5-dichlorophenyl) -5-methyl-5-carbethoxyoxazolidin   2,4-dione. Formulations according to claim 1, characterized in that   the pesticide is zinc dimethyldithiocarbamate.   Formulations according to claim 1, characterized in that   the pesticide is zinc propylene bis-dithiocarbamate.