SU1734622A1 - Fungicide composition for protection of plants from fungicidal diseases - Google Patents

Abstract

The invention relates to chemical plant protection products. The purpose of the invention is to reduce toxicity to warm-blooded animals and to improve the physical properties of the fungicidal composition. Proposed fungicidal composition containing, in wt.%. ammophos 0,35-0,40, copper sulfate 0,70- 0,80, urea 0 10-0,20, sodium carbonate O 32-0,35, water - the rest Replacing the known composition of ammonia with carbonate sodium leads to three times reducing the toxicity of the composition for warm-blooded animals. At the same time, the stability of the composition increased 1.5 times the wetting angle decreased by 10 °. improved adhesive properties of the composition of table 5

Description

This invention relates to chemical plant protection products.

A fungicidal composition for protecting plants against fungal diseases, containing ammophos, copper sulfate, urea, ammonia and water is known.

The disadvantages of this composition are the high toxicity for warm-blooded animals and the deteriorated physical properties that reduce its biological activity.

The purpose of the invention is to reduce toxicity to warm-blooded animals and to improve the physical properties of the fungicidal composition.

In the well-known composition, ammonia is replaced by another basic reagent - sodium carbonate.

Example 1. In order to obtain 100 g of a composition containing, in wt.%: Ammophos, 0.35; sodium carbonate 0.30; CuS04 5HaO 0.70; urea 0.1 and water 98,55, to solution

ammophos, obtained by dissolving 0.35 g of the substance in 50 ml of H2O, added 0.30 g of sodium sulphate with stirring. 0.1 g of urea, a solution of 0.70 5H20 in 40 ml of H20, the weight of the suspension is adjusted to 100 g with water.

Examples 2-9. Analogously to example 1, new variants are obtained.

Presents the content of components in the proposed known compositions according to examples 1-9 (wt.%).

The biological efficacy of the fungicidal composition was studied in winter greenhouses on cucumbers of the NIIO.H-412 variety with fourfold repetition and an area of 10 m2. After planting the seedlings in the ground, each plant is watered twice with 0.3 l of working fluid of a certain composition with a time interval of 10-12 days. The dosage is determined experimentally and alone is optimal.

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Accounting for root rot damage on the roots of plants during the period of their elimination. The degree of damage to the root system was assessed by four-point feces:

0- healthy plant;

1-weak browning of the central core;

2- browning of the lower part of the central root or fusion of spots and the beginning of maceration of the affected tissue;

3- central root, cervical root and brown roots; maceration covered about 1/2 root;

4 - brown root, there are no side roots, more than 1/2 root of the plant is crushed;

Table 2 shows the effectiveness of the fungicidal composition in the fight against root rot of cucumbers (variety NIIOH-412)

From the obtained data it follows that the fungicidal composition in the following ratio of components, wt.% Ammophos 0.35-0.40

Sodium carbonate NazCOa 0.32-0.35

Copper sulfate CuSCM 5H20 0,70-,80

Urea 0.10-0.20

Water the rest

possesses a biological efficacy exceeding the biological efficacy of the known soya gawa twice

Example 10. The fungicidal action of aqueous solutions (suspensions) of the proposed and known compositions is studied on a botanical tree of late blight susceptible potato varieties Belarusian early (grown in a greenhouse) in tenfold repetition. Potato tops in the budding period are sprayed once with compositions. suspension of the causative agent of the disease. The concentration density in the suspension is 40-50 conidia in the field of view of the microscope at low magnification. In the greenhouse, the optimum temperature and humidity are created for the development and manifestation of the disease.

The development of the disease is taken into account on the eighth day.

In tab. 3 shows the effectiveness of fungicidal composition in relation to the pathogen of late blight of potatoes.

Compared with the known protective effect of the proposed composition, it is nine times higher, and the biological efficiency (98%) is almost close to 100% with epiphytotic manifestation of late blight (87%).

Example 11. The physicochemical properties of the known composition were studied. The composition proposed is 1.5 times higher stability, 10 ° below the angle curve.

wetting and improved adhesion properties.

Example 12. Toxicological studies and their volume were carried out in accordance with the guidelines for

hygienic assessment of new pesticides. For the possibility of comparative study, the integral mortality rate of white mice (as the most sensitive animal species) in acute experiments was chosen.

when administered intragastrically, and also takes into account the nature of the combined effect of the ingredients of both suspensions, which is evaluated according to the methodological recommendations. The calculation of the average lethal doses (LD0) is carried out by the least squares method for probit analysis of mortality curves according to B. B. Prozorovsky

The results of toxicological studies are given in table. four

 The results are shown in Table. 4 indicate a lower toxicity of the proposed composition compared to

famous

Example 13. According to the results of studies presented in table 4, calculate the specific proportions of the components of the proposed and known compositions in the LDBO value of each of the compositions

In gabl 5, the specific proportions of the components in the LDzo are known and proposed compositions and their effects (death of mice,%. From LD 50 components).

The unidirectionality of the combined action of the ingredients of the compositions allows comparison of their toxicity with respect to the specific proportions of copper sulfate in the LDZO preparations. Udelna dol

copper sulfate in the LDW of a known composition leaves 274.3 mg, in the LDE of the proposed is 825.6 mg. The ratio of the fractions is 2.996, which indicates that the toxicity of the proposed composition is three times lower than the toxicity of the known.

Claims (1)

The invention has a fungicidal composition for protecting plants against fungal diseases, including ammophos, copper sulfate, urea, basic reagent and water, characterized in that it contains sodium carbonate as the main reagent to reduce toxicity to warm-blooded animals and improve physical properties. in the following ratio of components wt.%: Ammophos 0.35-0.40 Copper sulfate 0,70-0,80 0.10-0.20 0.32-0.35 Rest Table 1 Table 2 Note. HCPos 6.96. T a b l and c a 3 Table4 Continuation table 4 TableB