SU356830A1 - FUNGICIDE COMPOSITION - Google Patents

Description

Isu.bret & nle refers to the preparation of "new fungicidal | SI1NergeIkicheskim kombi1N-atsiy c. a burybe with diseases of rice plants, in particular, tiricut riosis, called Perku-. laria oryzae, and rhizoctoniosis, called Pelliicularia sasakii.

From 1vest 1 to the funcidal composition containing 0-alkyl-5-5-diphenylphosphorodiolate of the formula:

RO-P

where R is alkyl with 2-3 carbon atoms.

In order to increase the preventive and therapeutic effect, especially in the fight against rice diseases (plants, a fungicidal com1P013I | Qi is proposed, containing 4,5,6,7 tetrachlorophthalide formulas:

I: H.

The proposed fungicidal composition differs from that known in that its constituents are taken in a weight ratio from 4: 1 to 1: 1.

Form (Preparation of the preparation is wrapped around: liquid preparations, emulsifiable liquids, end 1 of the preparations, wetting powders, ki, aer | 0zol1I, pastes, tablets, granules.

The amount of fungicide used is from 15 to 1000 g per 10 a, preferably 40-600 g per 10 a, b (calculated as both active components together.

In the examples, a synergistic effect caused by the use of a fungicidal composition consisting of one and two components is shown.

Example 1

Oh, trying - Against the pyrnculus of the rice plant.

Test 1, showing the safety effect and its duration.

Rice is grown in a pot with a diameter of 12 cm. The phutapicidal composition and each of the active components are individually sprayed5 (Ria plants are grown in the shoot stage.

for two days, “from the next day, the chemical was sprayed, and the second half was kept in the same room for two days, starting from the second day after the chemical spray.

At the time of sampling: vanilla, in a wet room, rice is sprayed two times with an Onoip suspension of artificially grown pathogenic bacteria Oirnkuliosis (50,000-100,000 dpi / ml). The results of infection on the next day after chemical spraying show an immediate protective effect, and the results of infection on the fifth day after chemical spraying make it possible to estimate the duration of the preservative effect. Seven days after infection, ten stems are taken from each pot, and the extent of the disease is determined on the two highest leaves in the range from 0 to 5; the degree of damage is calculated using the following formula. The phytotoxicity of the dohimicate in rice grown on steeped fields is determined simultaneously with the determination of the extent of damage to the disease.

Degree of damage The area in which the disease is: scores

diseases,%

0O

0.5 less than 2

13-5

6-10 11-20 21-40 more than 40

Damage rate

-, 5 - H - 4 // C + 8L 4

X100,

10 lg

where n

- general

the number of test leaves, No, 5 - the number of leaves with a degree

lesion 0.5, NS - the number of leaves with a degree

defeat 5.

Test 2, showing the curative effect against pyrikule rioza rice plants.

The rice was kept in a wet room: And at 25 ° C and relative humidity of 100% for two days, during which Rio's plants were harvested with the same suspension of artisans of grown pathogenic bacteria of pyriculosis, as in test I. The next day, fungicidal 1KO | М1ПО ЗН П, and each willow of the active components separately sprayed the shoots of risovy plants.

Six days after the chemical spraying, the degree of the pi) i1cul plose is determined for each pot. The results of the effects against rice briar riosa are shown in Table. one.

Table 1

- means that the chemist did not have a negative

Effect Against pyrikuriosis of rice leaves (iBa experiment. Field with seeds planted in grooves).

formed naturally about: brazom, began to appear on the leaves of rice plants. The effect of the relationship between the occurrence of the disease and the time of use of the chemical for the control of pyriculture disease was tested. action on the growth of rice plants.

The variety of rice Asahi, 1predra riozy, was planted on July 17, the number of seeds was 80 g / f 2, the amount of 1 Ploshch | a.di: each ino 1 m from the V01, the primordial time of the chemical and the amount of dohimicate applied - 4 kg - at 10 a, the control date is August 30. The area on which they hover

Oh, the leaf area does not include leaves that are affected by leaf rizoliosis, or the control and precautionary value

The results of the effects against the pyric rIO-table. 2

behind the leaves of rice plants are shown in

With the help of volatile selected 50 stems of one area, the area of the disease that has patches was determined according to the standard for controlling the degree of disease of the pyricuma ria and leaves.

Standard Diseases of Lyrics of Rio130M Leaves.

leaves, ecTecTBeHiHbiM o, brazom.

Table 2 disease spots (degree of disease spots occurrence - (degree of disease spots appearance on untreated area) or on the treated area) leaf area, on which the total leaf area spots appeared Degree of disease spots appearance on untreated area X 100