JPS62111901A - Male sterilizing agent for plant - Google Patents

Abstract

PURPOSE:A male sterilizing agent for plants, containing a specific 1,2,4- triazine-3,5-dione derivative as an active ingredient and capable of readily and efficiently inducing male sterility by treating plants. CONSTITUTION:A male sterilizing agent for plants containing a 1,2,4-triazine-3,5- dione derivative expressed by formula I [R1 is H or formula II (R2 is alkyl or phenyl)] or a metal salt thereof, e.g. alkali metal salt such as Na or K, etc., alkaline earth metal salt such as Ca or Ba, etc., as on active ingredient. A carrier or adjuvant is mixed with the above-mentioned active ingredient and formulated into emulsion, wettable powder, suspension, granule, liquid solution, etc., for use. The amount of the active ingredient in the formulation is 0.1-90% weight ratio. The agent is useful for various cultivated crops, e.g. grains such as rice plant, wheat, corn, etc., leguminous crops such as soybean, etc., vegetables such as eggplant, tomato, cabbage, etc., flowering plants such as petunia, etc.

Description

[Detailed description of the invention]

The present invention represents the general formula [υ group or phenyl group]. )] The present invention relates to a male sterilizing agent for plants containing a riazine-8,5-dione derivative or a metal salt thereof as an active ingredient. 1,2,4-triazine-8 represented by general formula [T]
,5-dione derivatives include, for example, alkali metal salts such as sodium, potassium, and lithium;
/Vium, barium, strontium, and other alkaline earth metal salts can be added to the food supply.In recent years, food crises have become a hot topic, and increasing production has become a major issue.In such circumstances, the first generation of hybrids The first generation zero hybrid plants, which are attracting attention for plant production, are known to have many superior traits such as vigorous growth and higher yields than their parent varieties. In order to obtain first-generation hybrid seeds, it is necessary to prevent self-pollination of the female parent, and for this purpose, the stamens of the female parent must be removed. Conventionally, this emasculation process was very labor intensive. Rice,
Since wheat is a highly self-pollinating grain and has stamens and stamens within its small stamens, it is almost impossible to produce a large amount of hybrid seeds by manually cultivating the grains. there were. There are other methods, such as the use of cytoplasmic male sterility, but they all have the problem of requiring a long period of time to develop, and therefore do not cause male sterility without losing the female's ability to pollinate. In reality, there is a need for a simple and reliable method to do this.As a result of extensive research over many years, the present inventors surprisingly found that 1°2. By administering a 4-triazine-8,6-sion derivative or its metal derivative (hereinafter simply referred to as the present triazine derivative) to a plant. The zero-triazine conductor, which was discovered to be extremely easy and efficient to cause male sterility, and which led to the completion of the present invention, is disclosed in, for example, JP-A-56-100702 and JP-A-56-100702.
-104874 It is a known chemical compound a described in each publication. The target plants to which the sterilization j111 of the present invention can be applied include, for example, grains such as rice, wheat, barley, oats, rye, and corn; leguminous crops such as dice;
Various cultivated plants can be mentioned, such as Satsuma chili such as Nanu, tomatoes, and cabbage, and flowers such as petunia and Japanese flowers.Specific examples of the present triazine derivatives are shown below, but of course they are limited to only these. It's not something to be underestimated. It is mixed with a first surface carrier, a surfactant, and other formulation auxiliaries, and formulated into an emulsion, an aqueous solution, a suspension, a granule, a liquid, and the like. These preparations contain the compound of the present invention as an active ingredient in an amount of 0.1 to 90%, preferably 1 to 70% by weight. Examples of solid carriers include kaolin fret, attabulgite clay, bentonite, acid clay, Examples include acid powders or granules such as pyrophyllite, lily, diatomaceous earth, calcite, walnut powder, urea, ammonium sulfate, and synthetic hydrous silicon oxide. As a carrier, aromatic compounds such as xylene and methylnaphthalene are used. Hydrocarbons, alcohols such as isoglobanol, ethylene glycol, and cellosolve, ketones such as acetone, V-hegisanone, and isophorone, vegetable oils such as soybean oil and #M seed oil, dimethyl sulfoxide V-d, and acetate. Tolyl, water, etc. are available.Surfactants used for emulsification, dispersion, wet spreading, etc. include alkyl sulfate ester) V salts, alkylaryl-μ sulfonates, dialkylphosuccinates, Polyoxyethylene alkyl-arylethe, A/phosphoric acid ester/
Anionic surfactants such as L' salt, polyoxyethylene alkyl ether, polyoxyethylene alkyl aryl ether, polyoxyethylene polyoxine propylene block copolymer, sorbitan fatty acid ester, Horioki V ethylene sorbitan fatty acid Examples include ionic surfactants. Examples of formulation adjuvants include lignin sulfonate, alginate, polyvinyl alcohol, gum arabic, CMC (carboxylic methylcellulose), and PAP (isopropylene acid phosphate/L/). Next, a formulation example is shown◇Compounds are shown in the compound numbers in Table 1. 0 parts indicate parts by weight 0 Formulation Example 1 Compound (1) 10 parts, carunium ligninsulfonate 8 parts, Wouri #sodium sulfate 2 parts and 86 parts of synthetic hydrous silicon oxide are thoroughly ground and mixed.

[Obtain a wettable powder with -○ Formulation Example 2 Compound (8) 10 parts, polyoxyethylene styrylphenyl ether] 4 parts, Dode V, /1/calcium benzenesulfonate 6 parts and V clohexanone 70 parts Q Formulation Example 8 to obtain an emulsion by mixing 2 parts of compound (2), 1 part of synthetic hydrated silicon oxide, 2 parts of lignin A/calcium phonate, 80 parts of bentonite and 65 parts of kaolin clay were thoroughly ground and mixed, and water was added. After thoroughly kneading the mixture, the mixture is granulated and dried to obtain granules. Formulation Example 4 Mix 8125 parts of the compound, 8 parts of Polyoxy V ethylene sorbitan monooleate, 8 parts of 0M0, and 69 parts of water, and wet-pulverize in an oven to give a particle size of 5 microns or less to obtain a suspension. Formulation Example 5 Mix 1 part each of compounds (1) and (2), 1 part polyoxyethylene styrylphenyl ether/1 part and 98 parts water and dissolve 1 part to obtain each liquid agent. 0 Sterilizing agents are actually used. In this case, treatment methods include foliage treatment and dirt treatment, and the treatment amount varies depending on the target crop, treatment method, treatment time, environmental conditions, and formulation form, but is usually 0.005 to 10 rFg. /ha, preferably 0,
02-8 Vha. The treatment timing varies depending on the target crop, treatment method, environmental conditions, amount of treatment, formulation form, etc., but it is preferably treated between before the start of academic growth and just before flowering.0 Emulsions, irrigation agents, suspensions For agents, ← liquid agents, etc., the prescribed amount is usually 1 ar/I/at Shiro. Diluted with 5 liters/l/~20 liters of water (adding auxiliary agents such as a spreading agent if necessary) and processed. Granules, etc. are usually processed as they are without any dilution. In addition to the above-mentioned surfactants, examples of agents include polyoxine ethylene resin acid (Este/I/)
, likunin sulfonate, abietate, dinaphthylmethane disulfonate, and paraffin sauce. It can also be used in combination with other plants, growth regulators, herbicides, insecticides, acaricides, nematicides, fungicides, fertilizers, and soil conditioners. In order to further obtain large quantities of hybrid seeds, the following method is generally suitable: alternating planting of the two parents to be crossed. At this time, the number and width of the famous parents are
It varies depending on the species, variety, and environmental conditions of the crop. Then, the female parent is treated with this triazine derivative, and the female parent, which has become male sterile, is pollinated with the pollen of the other male parent with male activity to obtain pure hybrid first generation seeds. If you wish to use this triazine derivative, the male sterile female parent should be covered with a bag before flowering to prevent cross-pollination, and after flowering the pollen of the male parent, which has male virility, can be directly harvested. It is preferable to cross-breed and re-bag it again. Next, test examples will be given to explain the present invention in more detail. Compounds are indicated by the compound numbers listed in Table 1. Wheat (variety: Norin No. 61) was sown in a soil filled with soil, and grown under greenhouse conditions with a seed temperature of 7℃ and a night temperature of 20℃ (15-hour photoperiod, no side light). The beginning is 0~
The test compound was formulated into an emulsion or solution in the same pot eight times from 1.7 to 8 and 14 to 15 days lIJ, and a predetermined amount of it was diluted with water containing a spreading agent per 1 are. ?
10! In J.T.L.'s liquid journal, we used a small rIA mist to treat the stems and leaves from the plant body. After heading and before flowering, we placed bags on 4 ears per pot to prevent cross-pollination, and after ripening. The number of spikelets and number of seeds were examined for the eared ears, and the sterility of each compound was shown by the percentage of the number of seeds per ear compared to the untreated area (Table 2) 0 (lO) Table 2 Test Example 2 Confirmation of female virtue in wheat - (1 Similar to Example 1, wheat Norin No. 61 was grown, and the test compound was formulated into a liquid preparation on the PB day or 11 days before the beginning of heading. Then, dilute the h volume with water containing km agent and make 1
7-) Using a small sprayer with a liquid volume of 910 liters, sprayed the leaves from above the plant. For the 4 panicles that had not been treated, the number of offspring was investigated from the area without chemical treatment, and the percentage of the number of offspring in the ear compared to the area without treatment was shown (Table 8). 0 bags were applied. If the value is higher in the hybridized panicle than in the panicle, it indicates that the hybridized panicle maintains female fertility even though it has male sterility. @Table 8 Test Example 8 Sterile rice (variety: Koshihikari) was sown in artificial soil, and 20 days after sowing, seedlings were planted in 1/10,000 are pots and flooded. Thereafter, the test compound was prepared in a liquid preparation eight times on the 20th, 18th, or 6th day before the beginning of heading, and the specified violet was diluted with water containing a spreading agent. To prevent cross-pollination, use a small sprayer to apply fibers from above the plants to the white panicles of the pot after earing. After ripening, the bagged ears were investigated for the number of flowers and seeds, and sterility was shown as a percentage of the number of flowers and seeds compared to the untreated plot (Table 4) 0 test Table 4 (Complete 1B)

Claims (1)

[Claims] General formula▲There are numerical formulas, chemical formulas, tables, etc.▼ [In the formula, R_1 represents a hydrogen atom or a group represented by the formula▲There are numerical formulas, chemical formulas, tables, etc.▼. (R_3 here
represents an alkyl group or a phenyl group. )] A male sterilizing agent for plants, comprising a 1,2,4-triazine-8,5-dione derivative or a metal salt thereof as an active ingredient.