SU1526565A3 - Fungicidal composition - Google Patents

Abstract

Fluid fungicidal compsns. contain, by wt., (a) 20-40% iprodione (I; 1-isopropylcarbamoyl- 3-(3,5-dichlorophenyl)hydantoin) as active component; (b) an oil-in-water emulsion contg. 50-160%, on (I), of an oil with HLB 8-12, pref. 10-11; (c) 0.1-2% ethoxy-lated fatty alcohol or nonionic emulsifier and (d) opt. 0.5-2.5% neutral, hydrophilic silica. Pref. the oil can dissolved 1-5g (I) per l at room temp. and may be a mineral or vegetable oil; esp. it has viscosity 20-30 cSt. The most pref. emulsifier is derived from 13C alcohols condensed with 9-10 moles ethylene oxide and the silica is esp. hydrated pptd. silica of BET surface 200-300 sq. m. per g. (I) is esp. useful for controlling Botrytis Cinerea, particularly on vines. These formations are more effective than conventional wettable powders and are easier to handle (no formation of dust) and are less easily washed off by rain.

Description

The invention relates to chemical plant protection against diseases and can be applied in agriculture.

The purpose of the invention is to increase the effectiveness of the protective effect against Botrytis cinerea by creating a new formulation of the known fungicidal agent 1- (N-isopropylcarbamoyl) -3- (3,5-dichlorophenyl) hydantoin (iprodione).

The proposed compositions are concentrated suspensions of iprodione in an oil-in-water emulsion. The active substance in these compounds x has the form of solid particles, the average diameter of which is less than 10 μm, preferably 1–5 μm.

The oil used in the compositions should dissolve 1-5 g of iprodione in 1 liter at normal temperature and have a HLB value of 10-11 and a viscosity of 20-30 cSt.

Compositions can be obtained in three stages. First, an oil-in-water emulsion is obtained by adding at

ate

1HE

O5 SP 05 SP

w

mixing the oil to water containing water-soluble additives and possibly emulsifiers. In the second stage, iprodion is dispersed to a fine powder in an emulsion of oil with noctoHHHOM stirring. In the third stage, the viscosity agent is dispersed. As a preservative, for example, a 40% formalin solution is used. This dispersion is introduced into a suspension of an iprodion.

Example 1. An oil suspension of the following composition is prepared, wt%:

Iprodion with a size of hour 25, 0

33.0

0.8 2.5

0.5 5.0

0.065 0.15

0.5 To 100

particles in the order of 2 microns Mineral paraffin oil containing more than 70% paraffin (the balance value of hydrophil-zhirophil is 10.5) and dissolving 1 g iprodione in 1 l oil

Emulsifier based on synthetic alcohols containing 13 carbon atoms, ethoxylated and containing 9-10 molecules of ethylene oxide. Ethoxylated polystyrylphenol phosphate. Ethoxylated polyalkylphenol. Ethylene glycol. Heteropolysaccharide (Rodopol 23) Formol (aqueous 40% solution) Emulsifier silicone

First, in the tank mix the glycol, the silicone emulsion and the surfactant, which is the emulsifier. The mixture is stirred until completely dispersed, then the oil is poured.

With constant stirring, iprodione is added to the mixture. Em, this, which is ground in a DYNO-MILL mill to obtain a concentrated suspension of iprodion, is obtained.

At the third and fourth stages, pre-dispersed in a small amount of water containing a preservative (40% formol), a solution viscosity agent (heteropolysaccharide

five

0

five

0

five

0

five

0

five

introduced into iprodione suspension to obtain a final slurry or concentrated dispersion suitable for use.

Example 2. According to example 1, an oily concentrated suspension of the following composition is prepared, wt%:

Iprodion3Q, 0

Mineral oil containing more than 70% paraffin (the balance value of hydrophyl-zhirophil is 10) and dissolving 1.2 g of iprodion in 1 liter of oil 20.0 Ethylene glycol5.0

Ethoxylated synthetic alcohol (p. 8-10)

Phosphate ethoxylated polystyrylphenol Silicone oil sulci

Synthetic neutral hydrophilic silicic anhydride (specific surface BET 20) Water

Example 3. In Example 1, an oil concentrated suspension of the following composition is prepared, in% by weight:

Iprodion

Mineral oil containing more than 70% paraffin (the balance value of hydrophil-zhirophil is 11) and dissolving 1 g of iprodione in 1 l of oil

Ethylene glycol Ethoxylated synthetic alcohols Ci (p 9-10)

Ethoxylated poly-arylphenol phosphate Silicone oil emulsion

Precipitated neutral hydrophilic silicic anhydride (BET 300 specific surface) Water

0.8 1.2 0.5

2.0 to 100

37.5

43

20.0 5.0

1.0 1.5 0.5

1.25 to 100

Example 4. According to Example 1, an oily concentrated suspension of the following composition is prepared, in% by weight:

Iprodion37,5

Industrial peanut butter, dissolving 3.5 g of iprodione per liter 20.0 Ethylene glycol5.0

Ethoxylated Synthetic Alcohols C (p 9-1U) 1.0

Silicone Oil Emulsion 0.5

Neutral hydrophilic silicic anhydride 1.0 Water up to 100

Example 5. In Example 1, an oily concentrated sedation of the following composition is prepared, wt%: Iprodione 26.0

Paraffin mineral oil (more than 70% paraffin, the value of BCG is 10.5, dissolves 4.5 g of iprodione in 1 l of oil) 32.2 Emulsifier based on ethoxylated synthetic alcohols C, 5 containing 9-10 mol of ethylene oxide 0.8

Ethoxylated polystyrylphenol phosphate 2,5 Ethoxylated polyalkylphenol0,5

Propylene glycol 5,0

Heteropolysaccharide (Rhodopol 23) 0.65

Formol (A0% aqueous solution) 1.5

WaterUnder 100

Example 6. According to example 1, an oily concentrated suspension of the following composition is pressed, ac,%: (iprodion is combined with another active substance-carbendazim, additions, according to example 5):

Andprodion18,0

Carbendazim9.5

Paraffin mineral oil28.0 Emulsifier based on ethoxylated synthetic alcohols C and containing 9–10 mol of ethylene oxide 0.8 Estoxylated polystyrylphenol phosphate 2.5 Ethoxylated polyalkylphenol 0.5 Tip polyethylene glycol 5.0 Heteropolysaccharide

five

0

five

0

five

0

five

0

five

(Rodopol 23) 1.3

Formol (40% water

solution) 3.0

WaterUnder 100

Example 7 Fungicidal testing outdoors on the grape fungus Botrytis cinerea.

These tests were carried out on grapevings with an area of 50 m. For comparison, equal doses per hectare of an industrial wetting powder containing 50% by weight of iprodion were used.

First treatment: to drop off the corolla of the flower, for the improvement of dried flowers, which can hang for years and close the bunch.

Second processing: before closing the cluster, i.e. when it is still possible by spraying to reach a bunch in order to protect it from early decay.

Third treatment: on the eve of the period of early ripening, i.e. on the eve of the moment when the years become sensitive to the attacks of Botrytis cinerea, due to which sulfur mold starts to rot the grapes.

Fourth treatment: about three weeks before the grapes are harvested to ensure a good sanitary state of the crop, at a time when physiological and climatic conditions are often very favorable for the development of fungi.

The above treatments were carried out with low volume pneumatic spraying from 100 to 300 l / ha, aimed at the grape clusters (localized treatment), the treatment dose is 750 g of the active substance per 1 ha.

Infection with Botrytis cinerea usually occurs in September and October, which is characterized by good weather and frequent night fogs.

Were left cases nki untreated active substance.

After harvesting, the degree of rotting year is calculated on the treated and on the untreated cases.

In untreated grapes, it was found that 41% of the grapes were damaged, the iprodion composition in the form of a 30% wettable powder had an efficiency or average protection of 34%, while the compositions according to examples 1-5 provide the following protection: 61; 63; 70; 69 and 60% respectively.

In addition, these compositions show complete selectivity for grapes.

Example 8. Fungicidal tests in the open air on Botrytis cinerea beans.

These tests were carried out on 5 m plants with bean plantations. For comparison, an industrial wettable powder containing 50% by weight of iprodion was used, and the composition according to Example 1. Each treatment was carried out with low volume pneumatic breathing (from 100 to 300 l / ha) at a dose of 750 g / ha.

First treatment: early bloom.

Second treatment: at the end of bloom.

For comparison, cases of non-fungicidal treatment are left.

Infection has passed normally.

Under these conditions, it was found that comparative cases were infected by about 27%; cases treated with iprodione in the form of a wettable powder were contaminated by about 15%; Ipro cases treated with iprodio; 1 by the invention were infected with A, 5%.

Example 9. Planting of tomatoes Eurocroas B 15 cm high was treated with a seed by iprodione in the form of a wetting powder containing 50 wt.% Active substance, and iprodion of example 1, both types of fungicide used in the amount of 375 g of the active substance per 1000 L. The treated leaves were left to dry. Then a few plants were exposed to artificial rain directed at different levels of the plants. Leaf samples were analyzed and they were grafted with the help of a tombon of the mycelium Botrytia cinerea, after which they were left for 4 days at 20 ° C in an atmosphere saturated with moisture and illuminated. Then control of the fungus

Under these conditions, it has been observed that when sprinkling 5 mm of rain, comparative plants are completely infected; when it rains by 5 mm, samples treated with iprodione in the form of a wettable powder are 56% affected, and only 36% of plants treated with iprodione according to the invention are affected; when doge

ABOUT

five

0

five

0

five

10 mm, the samples treated with iprodione in the form of a wettable powder are 87% affected, against only 31% of the plants treated with iprodion according to the invention.

Example 10. Tests are carried out according to example 9, using the composition according to examples 2-5.

As a result of the treatment, it was established that with irrigation with water for 5 mm, the control plants were completely infected; The degree of infection of plants treated with the compositions of examples 2-5 is 38, 39, 39 and 36%. When irrigating with water per 100 mm, the degree of infection of plants treated with the commercial preparation is 85%, and in plants treated with compositions

examples 2-5, respectively, 32- 37- 37 and 31%.

Example 11. In example 1, an oily concentrated suspension of the following composition is prepared, in% by weight:

Iprodion20

Paraffin mineral oil (carrier) 28.0 Emulsifier based on ethoxylated synthetic alcohols С, с Propylene glycol - antifreeze5,0 Heteropolysaccharide (Rhodopol 23) 1.3 Water Up to 100 This composition was tested for resistance to the fungus Botrytis cinerea according to Example 7, applying a dose of the active substance in the amount of 750 g / ha. The investigated composition provides protection of grapes by 60.5%.

Claims (1)

When irrigating with 5 mm water, the plants treated with the composition are 31% infected compared to the 56% infection in plants treated with the product. Invention Formula Fungicidal composition comprising 1 - (L-isopropylcarbamoyl) -3- (3,5-di 152656510 chlorophenyl) -hydantoin as an active ingredient from the group: silicone oil it is a substance, surface-active or its mixture with ethoxylated substance and carrier, about tl and h-styryl phosphate (1: 2.4), or a mixture so that, in order to increase the eff-ethoxylated polystyryl phosphate efficacy of a protective effect on α and ethoxylated alkylphenol wearing Botrytis cineree, composition (5: 1), or their mixture with formaldehyde contains as a carrier mineral- (5: 1: 3), with the following ratio Nye oil with a content of paraffin components, wt.%: more than 70% and hydrophilic-lipophilic .Q balance 10-11 or peanut butter. Active substance 20.0-37.5 as a surface-active agent. Carrier 20.0-33.0 substances - ethoxylated () Surface-C (J-synthetic fatty alcohols, and the active substance additionally contains water, thickens 0). , 8-1.0 tel, selected from the group: hydrophilic-thickener 0.065-2.0 ny silicon anhydride or polysach-antifreeze 5.0 read Xanthomonas, antifreeze-ethylene, additive 1.0-4.5 or propylene glycol, and additive Vyb- Water Else