SU1012782A3 - Defoliant - Google Patents

Abstract

Plant growth regulating compsn. of 0.001-40% wt. of 2-chloroethanephosphonic acid or one of its salts and a water-sol. salt of 8-hydroxyquinoline, pref. the sulphate, in a molar ratio of 1:0.5-20 and 1-10:1, together with a dilutent, opt. contg. surfactants and/or buffers. Presence of the 8-hydroxyquinoline increases the rate of abscission of plants and induced by 2-chloroethane-phosphonic acid. Specific uses include defoliation of nursery plants such as peaches, cherries, pears, apples, grapes, or young rose plants. This makes peaches, for example, more visible and makes the mechanical harvesting of peaches, cherries, and other fruits and also nuts, easier.

Description

The invention relates to agriculture and can be used to defoliate plants.

Means are known for defoliation of plants based on ethylene, abscisic acid 1.

However, these substances are natural growth regulators and their synthesis is limited.

It is also known a means for defaulting plants, containing 2-chloroethane phosphonic acid (and its derivatives) and auxiliary components 2.

However, this tool has insufficient deforming activity.

The purpose of the invention is to increase the defoliating activity.

The goal is achieved by the fact that the tool additionally contains 8-hydroxyquinoline sulfate, and as auxiliary components - propylene glycol and water in the following ratio of components, wt.% 1

2-Chloroethane Phosphonic

acid 20-35

8-hydroxyquinoline sulfate 5-20

Propylene glycol24

WaterEverything

Example. Young two-week-old Jullska bean plants planted in phytoboxes with two leaves were grown to a 5-centimeter stem. Leaf surfaces were slightly reduced, placed on a celluloid plate, test tubes were filled with control solutions, then leaves were placed for 24 hours in these test tubes under phytobox conditions (light, temperature, humidity). After 24 hours, the solutions were replaced with pure water and the dried plants were inspected. The experiment was repeated three times. One experiment lasted 3-4 days. Experiments were also carried out in such a way that not only the stems (acropetal path) / but also the leaves were sprayed or dipped into solutions. In the latter case, we are talking about Baeipetal transport.

After 17 h after treatment, the force of abscissa is reached using the following combinations of an aqueous solution of 2-chloro-ethanephosphonic acid and 5. 8-hydroxyquinoline sulfate (through the leaves) and an aqueous solution of 2-chloro-propane phosphonic acid and 5. 8-hydroxyquinoline sulfate (through the stem).

EXAMPLE 2. Experiments in the greenhouse were carried out with rooted shadows. Earthenware beans of the VJuliska variety were grown by groups of 5 plants in plastic pots of 15x15 cm in the washed Donau sand up to two weeks old. The plants were decapitated and sprayed for two consecutive days with an aqueous solution of 2-chloro-ethanephosphonic acid and then with an aqueous solution of 8-hydroxyquinoline sulfate and their combinations. 5-5 plants in three pots gave one option. 30 leaves were subjected to the same treatment in the experiment. The experiments were repeated three times. During the treatment, the entire amount of the solution, corresponding to a flow rate of 1 ml / sheet, was spent, which was sawn on the surface of the leaves using one electric sprayer. The first time the scission was evaluated after 72-96 hours, then each item was given.

In experiments in the greenhouse on beans, the most effective treatments and combinations gave the results, which are presented in Table. one.

Table

10-2

Control 5.10

13

 13

17 IT I and me 3, Shrubs wi rd a n ate, O7 hr osj Diyxe were sprayed by 9 w ome (herI9aL11 defocused and udgshee tme tuyudov. Plants were sprayed in the coop when there was a green and green water on the bushes when it was green and there was green water on the bushes. 4. The procedure is also carried out as in example 2 and xmbinium 5 .. mol n butnla (| Monilium salt 2-chloro

n t a b l and c a 2. 6ledn6-roz9: 1e solid fruit. 300 mp of solution were used for spraying. 2g2 pieces were subjected to the same treatment. Fruit removal was evaluated in%. Results; t ethanephosphonic acid & and B. sulphate Vgoksihinolina causes defoliation in the body 55 01, through nely-63% and in 2.5 weeks-77% (compared to the control experiment, where defoliation was caused by 2-chloro-ethanephosphonic acid the same concentration and it was 53% after 2

weeks).

EXAMPLE 5 In a tree pitcher, peach seedlings in front of fruit cjefe p in order to defoliate about 4,000 ppm 2-hl) ratanth; os frnovo (acid and a mixture consisting of - xoopo ethanephosphonic acid and sulfate 8-hydroxyquinoline in a molar ratio of 2-chloroethane phosphonate

25 acid

Thus, the proposed plant defoliation agent is more effective than the known ones and can be used preferably for defoliation in DRE-. spring nursery (peaches, cherries, (plums, blons, pears, grapes, rose seedlings), for making cuttings in orchards (peaches), to facilitate machine harvest (rose hips, peaches, cherries, plums, 45 blons, rpytmi, grapes; wivizn 10: 1, with a total concentration of 1000 ppm. 6 days after the treatment, the results were evaluated. It was found that only slight defoliation was observed on the plants treated with a single 2-chlorophenane phosphonic acid, four times the concentration, 1000 ppm of the mixture, on the contrary summoned forces hydrochloric defoliation.

In tab. 3 shows the proposed formulations of funds.

T a b l and c a 3

18

35

1.5

novena, various years, walnut, almond).

The advantage of the proposed remedy is that for defoliation with equal effectiveness with 2-chloroethane phosphonic acid, its concentration can be reduced by an order of magnitude, and when fruits are removed at the same concentration of 2-chloroethane-phosphonic acid, the efficiency increases 6–3 times .

Claims (2)

MEANS FOR PLANT DEFOLIATION, containing 2-chloroethane phosphonic acid and auxiliary components, characterized in that, in order to increase the defoliation activity, it additionally contains 8-hydroxyquinoline sulfate, and propylene glycol and vada as auxiliary components in the following ratio of components, 2-Chloroethanephosphonic acid Sulfate 8-hydroxyquinoline Propylene glycol Water wt.% ·. 20-35 5-20 Rest W01 ”ns 00 ke> 1012702