JPH02104501A - Plant-coating agent - Google Patents

Abstract

PURPOSE:To provide an inexpensive, readily practicable plant-coating agent safe without giving any damage to the physiological actions of the plant, requiring no anxiety of environmental pollution, capable of remarkably reducing the frozen hoarfrost damages of the plant and useful for preventing the frozen hoarfrost damages of the plant by containing a hydroxypropylcellulose. CONSTITUTION:A plant-coating agent contains a hydroxypropylcellulose of a polymeric substance having repeating units of formula I [R is H or formula II (m is an integer of >=1)] and an average mol.wt. of 10000-500000, a derivative thereof (the terminal OH of the substituent R in the formula I is an alkoxy such as OCH3) or a mixture thereof and, if necessary, any other cellulose derivative. The further addition of a leaf surface-spraying agent and a bactericide enhance the effect of the coating agent and the more further addition of a leaf-spraying fertilizer gives simultaneously the growth-increasing and sprouting- accelerating effects of the plant. The agent is preferably used in a form of a dispersion and in an amount of usually <=10wt.%, especially <=0.6wt.% depending on the spraying method.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a plant coating agent containing hydroxypropyl cellulose, its derivatives, or a mixture thereof, and is useful for protecting plants, particularly for preventing frost damage to plants. It is valid.

[Conventional technology]

As a means of preventing frost damage to plants, cultivation in facilities (houses),
Physical methods such as heating the environment around plants, placing them, producing smoke, and watering plants, using antagonistic microorganisms against ice-nucleating bacteria that cause frost damage No. 4: Physical methods and sterilization of ice-nucleating bacteria; In addition to the chemical method of spraying the inhibitor, a method of covering the surface of the plant with 1w has been proposed.

However, physical methods are difficult to automate, are expensive and have some problems such as pollution, biological methods are difficult to test for practical use, and chemical methods are difficult to test for practical use. However, there were other problems such as high drug costs.

Additionally, in the United States, foliar coating agents using carboxyl-modified acrylic acid copolymers have been put into practical use and are used on fruit trees and vegetables, but there are concerns that synthetic polymers may accumulate in the environment if used for a long period of time. There was a problem.

[Problem to be solved by the invention]

An object of the present invention is to provide a plant coating agent that is inexpensive, easy to implement, does not harm the physiological functions of plants, is safe, does not cause environmental pollution, and is effective in preventing frost damage. The purpose is

[Means to solve the problem]

The present invention comprises: (1) a plant coating containing hydroxypropylcellulose, its derivatives or mixtures thereof; (2)
Plant coatings containing hydroxypropylcellulose or its derivatives and other cellulose derivatives; (3) Plant coatings containing foliar spray fertilizers added to the above; and (4) Fungicides added to those marked with ■=. This is an added plant coating agent.

The present invention will be specifically explained below.

Book, -1r-a quinpropylcellulose if ('
0) "j"a'-'LILHydroxypropylcellulose (hereinafter abbreviated as HPC) used in the present invention has the following general formula (wherein, R is H or -
Y) having a repeating unit represented by O+1-II, m is an integer of 1 or more) with an average molecular weight of 10.000 to 50
It is a polymer material with a rating of 0r 000. As its derivatives, those in which the terminal OH group of the substituent R in the above general formula is an alkoxy group (for example, a methoxy group) are used.

When used in the form of an aqueous coating solution or dispersion, the amount used is usually less than 10% by weight, and particularly in the spraying method, it is preferably used in an amount of 0.6% by weight or less in the spraying solution.

It's cellulose in one cellulose such as methylcellulose (MC), ethylmethylcellulose (EMC), hydrotonoethylcellulose (HEC), hydroxoethylmethylcellulose (IIEMC), hydroxyethyl ethylcellulose (HEEC) , hydroxoethylhydroxybutyl cellulose (HE II B C), hydroxyalkyl celluloses (excluding hydroxypropyl cellulose and its derivatives), carboxymethyl cellulose (hereinafter referred to as CMC) abbreviated), sodium carboxymethylcellulose (CMC sodium)
, carboxyalkylcelluloses such as calcium carboxymethylcellulose (CMC), carboxymethylhydroxyethylcellulose (CMHEC), and the like.

When these are used in the form of an aqueous coating solution or dispersion, the amount is usually 10% by weight or less, and particularly in the spraying method, it is preferably used in an amount of 0.6% by weight or less in the spray solution. Further, the mixing ratio with HPC and/or its derivatives is not particularly limited.

1. Phytic acid, nitrogen, phosphoric acid, added IH, manganese, magnesium, boron, iron, sinus, curved lead, molybdenum, etc.

When these foliar spray fertilizer components are used in the form of an aqueous coating solution or dispersion, the amount is usually 4% by weight or less, and especially in the spraying method, they are used at 0.01 to 0.6% by weight in the spray solution. is preferred. Also, N P C1 its derivatives and/or
The mixing ratio with other cellulose derivatives is not particularly limited.

And I5 Bordeaux, strebtomine sulfate, etc.

When these fungicides are used in the form of an aqueous coating solution or dispersion, the amount is usually 4% by weight or less, and particularly in the spraying method, it is preferably used in an amount of 0.6 ilt% quantum or less in the spray solution. In addition, the mixing ratio of RP C1 derivatives, other cellulose derivatives, and/or foliar spray fertilizers is as follows:
Not particularly limited.

Stop A star bean (1) Surfactant Nonionic surfactant such as nonylphenyl ether type,
Cationic surfactants such as alkyl ammonium salts 7,
Anionic surfactants such as succinate (2) Antifoaming agents Antifoaming agents containing alcohol, silicone oil, fatty acids, etc. (3) Other organic acids such as citric acid, ethylenediaminetetraacetic acid (EDT)
A) The amount of these components used, such as amino acids, sugars, and other frost protection substances, is usually 0-1.0% by weight as a surfactant when used in the form of an aqueous solution or dispersion of RF17pI. Preferably it is 0.001 to 0.5% by weight, preferably 0 to 1.0% by weight as an antifoaming agent, preferably 0.01 to 0.06% by weight.

Any form can be used as long as it can cover 1 to 4 flies, but it is usually used in the form of an aqueous solution or a liquid containing water molecules Pi.

, Li'LJ! In-manufactured JL method - After adding RPCl derivatives or their mixtures to water, antifoaming agents and surfactants if necessary, and optionally other cellulose derivatives or foliar spray fertilizer, mixer etc. Stir by stirring.

The stirring time varies depending on the degree of NPC, etc., but is usually about 10 to 15 minutes. Further, in order to eliminate foaming, ultrasonic treatment may be performed after stirring.

Spraying can be done manually, by power, by using a general sprayer using compressed gas, etc., or by applying with a brush, etc.

By these methods, it is applied as uniformly as possible to the entire plant or its -61H.

Izutatsu - Applicable to all plants that require protection from frost damage, such as fruit trees, canola, tea, and tobacco.

The timing of application can be selected as appropriate depending on the purpose, but in particular for prevention of frost damage, it is appropriate to apply from autumn before the cold season to spring when late frost occurs. Yes, it is only necessary to apply llt immediately after a frost damage warning is issued.

〔Example〕

Examples are shown below, but the present invention is not limited to the examples.

(Example 1) Okako ■Kami Nijo Water Supply 1 j1! 10 g of HPC (HPC-CB Nippon Soda side type, RPC content 32.2% by weight) and 0.05 g of nonionic surfactant Nucalgen D-420 (manufactured by Takemoto Yushi) were added to the mixture and stirred for about 10 minutes with a mixer. did. Further, ultrasonic treatment was performed for about 20 minutes to eliminate foaming, and a spray liquid 1.71 was prepared.

15 liters of soil and 2 liters of tap water, 10 g of RPC (HP, C-GB, above),
Fuchin Green (Nippon Soda■) is a foliar spray fertilizer.
(contains phytic acid, etc.) 2.5 d and nonionic surfactant Nucalgen D-420 (mentioned above) 0.05 g
was added and stirred with a mixer for about 10 minutes. Furthermore, ultrasonic treatment was performed for about 20 minutes to eliminate foam, and the spray liquid 1-2 was
Manufactured.

p Gosengo] Tomo radish (variety: Harutoki no daikon) 5 cm x 5
Seed 11i in a plastic pot of an, grow at room temperature (10-15 plants/bot), ice-nucleating active bacteria χanLh
Suspension of spores of Oson ascampestris 1 (
i4 degree: xo” pieces/ttr1 or more) 30 rrrl
was sprayed on radish leaves with expanded cotyledons and air-dried at room temperature for 4 hours.

After 4 hours, spray liquid 1-1.1-2, Comparative Example (CI-2) containing only tap water, and an aqueous solution of calcium hypochlorite, which is an ice nucleation activity inhibitor, were mixed. fli (CI-1),
7 dli cloth was applied to each liter pot, and the mixture was left at room temperature for 20 hours. After leaving it to stand, 15 radish treated in this way
°C constant/! ! Put it in the tank and keep it for 30 minutes. Thereafter, it was taken out from the thermostatic chamber and transferred to a greenhouse, and after 5 hours, the magnitude of frost damage was measured according to the following criteria.

It should be noted that all tests were conducted three times.

The magnitude of frost damage is expressed by an 11-level index from 0 to 10,
The results are shown in Table 1. 0 is! #damage, 1o indicates complete withering.

Table 1 *Concentration 2.000 ppm [Example 2] JPL-Ya 1-2” - Tap water 1j1! 3 g of HPC (RPC-3L, manufactured by Nippon Soda ■) and 0.05 g of a surfactant airl CT-1 (manufactured by Toho Chemical ■) were added to the mixture, and the mixture was stirred for about 10 minutes using a mixer. Ultrasonic treatment was performed using a ladle for 20 minutes to eliminate foaming, and a spray liquid 2-1 was prepared.

``inbo'' - 50 radish (variety: Niharu Totokimu daikon, applied with expanded cotyledons), 50 radish (approx. 10 trees/1 bot) with a suspension of ice-nucleated bacteria (Pseudomonas syringae)
50-, which was made into a suspension of 10" bacteria/ml or more, was sprayed and air-dried at room temperature for about 24 hours.7. After that, drug 11 was added to heavy solution 2-1 and Isa 1' as a comparative example. 5.ForEverGreen” (hereinafter referred to as I
"E C" (manufactured by 5afer, Inc.) (Comparative Example C2-1) and tap water only (Comparative Example C2-2)
4 bottles each (10 d/l bottles), 3 bottles at room temperature.
After drying for a while, low temperature treatment (-5°C33C53O+
I did 1. Thereafter, it was transferred to a greenhouse, and after 5 hours, the magnitude of frost damage was measured according to the standards of Example 1. Table 2 shows the results. The frost damage index in Table 2 is the average of 4 samples.

Table 2 [Example 3] 1 disease 1 main 2 upper Spray liquid 3-1 was prepared in the same manner as spray liquid 2-1.

-tl father cloth-7佼-β--2--3-tap water l! niR
3 g of PC (RPC-3L, mentioned above), 2 g of CMC (manufactured by Wako Pure Chemical Industries, Ltd.), and surfactant airl CT
0.05 g of I (described above) was added and stirred with a mixer for about 10 minutes. Furthermore, ultrasonic treatment was performed for about 20 minutes to eliminate foaming, and a spray liquid 3-2 was prepared.

Preparation 13-3 to 3-5 Spray liquids 3-3 to 3-5 were prepared based on Spray liquid 3-2. However, instead of CMC, the foliar spray fertilizer Fuchin Green (mentioned above) 2- is used in the spray solution 3-3.
-4, 2 g of nonionic surfactant T-80 (manufactured by Toho Chemical Co., Ltd.), and spray liquid 3-5, streptomycin sulfate (
2 g of Meiji Seika Co., Ltd.) was used.

6 203~l Tap water 11! 2g of CMC (@de) and surfactant ai
0.05 g of rrol CT-1 (mentioned above) was added, and the mixture was stirred with a mixer for about 10 minutes. Furthermore, ultrasonic treatment was performed for about 20 minutes to eliminate foaming, and spray liquid C3-1 was prepared.

8: C3-2 to C3-4 comparative example: C3
Spray liquids C3-2 to C3-4 of comparative examples were prepared according to Example 1. However, instead of CMC0, comparative example: C3-2
In this case, the foliar spray fertilizer Fuchin Green (mentioned above) 2d was used, and in the comparative example: C3-3, the nonionic surfactant T-8 was used.
In Comparative Example: C3-4, 2 g of streptomycin sulfate (see above) was used.

~:C3-5 Tap water was used as the spray liquid C3-5.

Packaging MjiJf = 50 bottles (approximately 10 trees/1 bottle) of Japanese radish (variety: Harutoki no daikon, with expanded cotyledons used) and a suspension of ice-nucleated bacteria (Pseudon+onas syringa).
50-, which is a suspension of the bacterial strain E at a concentration of 10' cells/ml or more, was sprayed and dried at room temperature for about 24 hours. After that, drug spray liquids 3-1 to 3-5 and C3-1 to C
Spray 4 pots of 3-3 at 10d/1 pot), dry at room temperature for 4 hours, and then process at low temperature (-5°C, 120m2).
i n) was performed. Thereafter, they were transferred to room temperature, and after 5 hours, the magnitude of frost damage was measured according to the standards of Example I. The results are shown in Table 3. In Table 3, the frost damage index is the average of 4 bottles.

Table 3 Book 4: Average of 1, 0, 0.0 [Example 4] One dispersion] L liquid "-2" - Tap water 11 and RPC (RPC-3L, manufactured by Nippon Soda ■) 6
g and surfactant airl CT-1 (mentioned above)
0.05 g was added and stirred with a mixer for about 10 minutes. Furthermore, ultrasonic treatment was performed for about 20 minutes to eliminate foaming, and a spray liquid 4-1 having a chemical spray concentration of 0.6% was prepared.

c' 4-2.4-3 RPC was used in accordance with llt fabric liquid heavy liquid 1 except that 3H, 1, and 5g of RPC were used, respectively, and drug 11 was applied at a fabric concentration of 0.
Spray liquid 4-2.4-3 was prepared, which was 3% and 0.15%.

Pseudo-activated bacterial suspension (Pseudo
A suspension of the Monas 5yriBae strain with a concentration of 10 8 cells/ml or higher) was sprayed and air-dried in a room for about 24 hours. After that, spray liquid 4
-1 to 4-3 and as a comparative example, 4 pots each of tap water only (comparative example C4-1) were sprayed at 10 #f/1 bottle,
), dried at room temperature for 4 hours and then subjected to low temperature treatment (-7°C).
120m1n) was carried out. The frost damage index in Table 4 is the average of 4 points.

Table 4 [Example 5] Top""Difference" L - 6 g of RPC (RPC-H, manufactured by Nippon Soda ■) in 1N tap water
and surfactant airl CT 1 (mentioned above) 0
．． 05g was added and stirred with a mixer for about 10 minutes. Furthermore, ultrasonic treatment was performed for about 20 minutes to eliminate foaming, thereby preparing a spray liquid 5-1.

1. On February 7, 1989, Spray Solution 5-1 was sprayed at 11 times per 1.5 m of tea over 10 m of tea on a farm in Haibara Town, Shizuoka Prefecture, and as a comparative example, the antifreeze agent FEG ( (mentioned above) is tea! , 50 per 5m
A sample sprayed with 0d (C5-1) and a sample without spraying (blank) were prepared, and since frost occurred on February 15th, the magnitude of frost damage was investigated at 6:50 am. The degree of frost damage is determined by the frost rate on the blank tea cake (untreated with chemicals)! 0
, expressed as an index with O representing no frost.

The results are shown in Table 5.

Table 5 (Example 6) 150 g of RPC (RPC-3L, above) and surfactant airl CT 1 (see above) 2 in distilled water 12
．． 5 g was added and stirred with a mixer for about 10 minutes.

Furthermore, 71 wave treatment was performed for about 20 minutes to eliminate foaming.

Add 2g of this solution to 100mβ of tap water and shake it 2 to 3 times to get a uniform distribution. 8? It became F16-1.

[Test Example 1] Put tap water 11 into a mixer on the knee of Ichisuda-on-1 agent-L, and add HPC (RPC-3L,
150g of the above) and the surfactant airlCT-1 (
2.5 g of the above) was added and stirred. Thereafter, for defoaming, ultrasonic treatment was performed for 10 minutes to prepare aqueous solution 7-1.

Pour 1 p of tap water into a mixer and mix HP C(f(P C-S+1, +i
il) 1.50 g and surfactant airol
C1' -1 (supra) 2.5+K and CMC (supra)
100g was added and stirred for 11 seconds. Thereafter, for defoaming, ultrasonic treatment was performed for 10 minutes to prepare aqueous solution 7-2.

When the water distribution solutions 7-1 and 7-2 were stored in a constant temperature bath at room temperature and 50° C. for one month, there was no change in appearance and no decomposition.

〔effect〕

Ice-nucleating bacteria are said to be one of the causes of frost damage. In the present invention, as a result of spraying a coating agent made of an aqueous solution containing HPC on plants treated with ice-nucleating bacteria, it was possible to significantly reduce the damage caused by freezing and frost on plants, as shown in the examples. Furthermore, cell 11-se derivatives other than HPC or its derivatives, foliar spray fertilizers,
Or, when it contains a bactericide, its effect is enhanced.

Furthermore, by incorporating a foliar spray fertilizer, the effect of promoting plant growth and sprouting can be obtained at the same time, making it a useful coating agent.

191 people: Japan VQTatsu Co., Ltd.

Claims (4)

[Claims] (1) Plant coatings containing hydroxypropyl cellulose, derivatives thereof, or mixtures thereof. (2) A plant coating agent containing hydroxypropylcellulose or its derivatives and other cellulose derivatives. (3) The plant coating agent according to claim 1 or 2, which contains a foliar spray fertilizer. (4) The plant coating agent according to claim 1, 2 or 3, which contains a fungicide.