CN102823613A - Pesticide for controlling pyricularia oryzae - Google Patents
Pesticide for controlling pyricularia oryzae Download PDFInfo
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- CN102823613A CN102823613A CN2012103633257A CN201210363325A CN102823613A CN 102823613 A CN102823613 A CN 102823613A CN 2012103633257 A CN2012103633257 A CN 2012103633257A CN 201210363325 A CN201210363325 A CN 201210363325A CN 102823613 A CN102823613 A CN 102823613A
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- isoprothiolane
- prochloraz
- rice
- pesticide
- agricultural chemicals
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Abstract
The invention discloses a pesticide for controlling pyricularia oryzae. The pesticide comprises prochloraz and isoprothiolane, wherein the mass ratio of the active ingredients of prochloraz and isoprothiolane is 1:(3-11). According to the invention, after being compounded and mixed, prochloraz and isoprothiolane have a synergistic effect, thus solving the problem of drug resistance of drug resistant pyricularia oryzae to single prochloraz or isoprothiolane; the use amount of the pesticide can be effectively reduced; the labor intensity is lowered; the cost is saved; the problem of applying excessive pesticides is solved; and the pesticide is simple and practicable and has wide material source, low cost and good using effect.
Description
Technical field
The present invention relates to field of agricultural science and technology, especially a kind of agricultural chemicals of preventing and treating rice blast.
Background technology
In recent years, China's paddy rice cultivated area was relatively stable more than 400,000,000, accounted for 30% of cereal crops area, and output is half the near total output of grain.Rice blast is one of three big diseases of China paddy rice, and this disease all has generation in each paddy rice producing region of China, can cause the underproduction significantly, and especially panicle blast takes place early to weigh, and can cause dead ears so that total crop failure.In production practices, the control rice blast generally all is to select single agricultural chemicals for use at present.Single medicine control rice blast, germ more is prone to hold the generation resistance, on producing, certainly will cause being multiplied of control number of times and pesticide dosage, and the also corresponding raising of expenses for prevention and control is also comparatively serious to the pollution of environment.Therefore, the rice farming urgently needs a kind of medicament efficiently, reaches the minimizing spraying times, prolongs the service life of agricultural chemicals, the safety that the raising agricultural chemicals uses and the purpose of high efficiency.
Summary of the invention
The objective of the invention is: a kind of agricultural chemicals of preventing and treating rice blast is provided, and it has solved the defective that current single chemical control exists, and can reduce the labour, reduces cost, and solves the problem of lavishment agricultural chemicals, to overcome the deficiency of prior art.
The present invention is achieved in that the agricultural chemicals of control rice blast, comprises Prochloraz and Isoprothiolane, and the mass ratio of Prochloraz and Isoprothiolane is 1:1～11.
Preferred scheme is, comprises Prochloraz and Isoprothiolane, and the mass ratio of Prochloraz and Isoprothiolane is 1:10.
Prochloraz is efficient, wide spectrum, low toxicity type bactericide, has multiple action such as prevention protection treatment grade.These article work through the biosynthesis that suppresses sterol, and no systemic action is splendid for the multiple diseases preventive effect that sac fungi and imperfect fungus cause, are the paddy rice diseases preventions, treat, root out the best medicament of triple function.Adopt gene induced technology, the activated plant disease-resistant gene is expressed, and quick-acting is good, and the lasting period is long, no systemic action, but price is higher.
Isoprothiolane is for shift systemic fungicide thoroughly.Rice blast (seedling pest, leaf pest, panicle blast) there is special efficacy, the double simultaneously multiple rice diseases such as the bent disease of fringe, rice kernel smut, rice sheath blight disease, helminthosporium leaf spot, rice culm rot of controlling.These article include high-efficiency activated dose and adhesive agent, have characteristics such as prevention phase length, control is remarkable, raising the output is obvious.
Technique effect of the present invention product of the present invention is carried out condition test in order further to verify.
, materials and methods
1.1 supply the reagent agent
Mass percent is 45% prochloraz aqueous emulsion (Shenzhen Nuopuxin Agricultural Chemical Co., Ltd);
Mass percent is 40% Isoprothiolane missible oil (east, Chongqing agricultural chemicals Co., Ltd).
Experimental scheme
75% tricyclazole wettable powder (16g), 40% Isoprothiolane missible oil (90mL)/mu (active ingredient proportioning 1:3); Contrast medicament 75% tricyclazole wettable powder 30g/ mu; 40% Isoprothiolane missible oil 140ml/ mu and blank (clear water processing), totally 4 processing, every processing repeats for 4 times; Count 16 sub-districts, every sub-district 15m
2, randomized arrangement, every sub-district is made ridge and is isolated, in case the soup crossfire, each sub-district rich water quality management level is consistent.
Test method
The He Feng township carries out in the head of the horse village in the Kaiyang County in this test, and experimental field physical features is smooth, middle fertility, and it is convenient to irrigate, and rice blast takes place serious throughout the year.The confession rice varieties that tries the water becomes excellent 894, and in sowing on April 21st, 2011, June 10 transplanted, and growing way is medium, and managerial skills are consistent.With the spraying of workers and peasants-16 hand-powered knapsack sprayer, spray value is a 60kg/ mu, once makes up a prescription in 4 sub-districts, and 1.35 kilograms of quantitatively sprayings of water are converted in the medication of every sub-district.Dispenser for the first time is in the paddy rice cut phase, i.e. July 21, dispenser for the second time is the paddy rice full heading time, i.e. August 10.Dispenser was fine the same day, no abnormal weather, temperature 22-33 ℃, average 26.5 ℃.
Investigation method
7d, 14d, 21d respectively look into once after the dispenser, and method is 5 samplings of every sub-district diagonal, and 3 clumps every, totally 15 clumps, the record fringe pest progression of causing harm calculates disease index and control efficiency, with the SAS method result of the test is carried out significance test of difference.
In the formula: CK
0Disease index before the dispenser of-blank district; CK
1Disease index after the dispenser of-blank district; PT
0Disease index before the dispenser of-chemicals treatment district; PT
1Disease index after the dispenser of-chemicals treatment district.
Disease index (is unit with the fringe):
0 grade: anosis;
1 grade: every fringe loss is (morbidity of indivedual branch stalk) below 5%;
3 grades: every fringe loss 6%～20% (branch stalk morbidity about 1/3rd);
5 grades: every fringe loss 21%～50% (fringe neck or main shaft morbidity, grain half is flat);
7 grades: every fringe loss 51%～70% (morbidity of fringe neck, big portion shrivelled kernel);
9 grades: every fringe loss 7%～100% (morbidity of fringe neck causes dead ears).
Ocular estimate investigation records poisoning type and degree are described symptom of chemical damage (dwarfing, chlorisis, deformity etc.).Write down simultaneously crop wholesome effect (like hasting of maturity, enhance vigour etc.).In addition, all should record to any influence of other damage by disease and insect, comprise useful and unhelpful influence.
Collected specimens when rice harves, the determination test medicament final residue amount in soil, rice straw, husk and brown rice.
Result and analysis
(active ingredient proportioning 1:10) is as shown in table 1 to the control efficiency of paddy rice panicle blast for 45% prochloraz aqueous emulsion (6mL), 40% Isoprothiolane missible oil (70mL)/mu, and the control efficiency of 7d, 14d, 21d is respectively 83.92%, 84.46%, 88.98% behind the medicine.
Contrast medicament 45% prochloraz aqueous emulsion (55mL)/mu 7d, 14d and 21d behind medicine are respectively 14.45%, 73.54% and 50.34% to the control efficiency of paddy rice panicle blast.
Contrast medicament 40% Isoprothiolane missible oil 140ml/ mu is respectively 77.73%, 65.64% and 62.48% at 7d, 14d and 21d to the control efficiency of paddy rice panicle blast.
Through the check of SAS method, 45% prochloraz aqueous emulsion (6mL), 40% Isoprothiolane missible oil (70mL)/mu 7d, 14d, 21d behind medicine all are higher than the contrast medicament significantly to the control efficiency of paddy rice panicle blast.Contrast medicament 45% prochloraz aqueous emulsion (55mL)/mu preventive effect of 7d and 21d behind medicine all significantly is lower than 40% Isoprothiolane missible oil 140ml/ mu; And 14d behind the medicine, the preventive effect of 45% prochloraz aqueous emulsion (55mL)/mu is significantly higher than 40% Isoprothiolane missible oil 140ml/ mu.
During whole test, use 45% prochloraz aqueous emulsion (6mL), 40% Isoprothiolane missible oil (70mL)/mu control panicle blast after, rice leaf is normal, does not see symptom of chemical damage.
The final residue quantitative determination result of test medicine shows, in soil, rice straw, husk and brown rice, does not all detect the existence that supplies the examination residue of pesticide, and is as shown in table 2.
Table1
Supply the control efficiency to rice blast of examination agricultural chemicals
Annotate: the English alphabet of data is a Duncan multiple ratio assay in the table, alphabetical identical person in the same row, and it is not remarkable to be illustrated on 0.05 level difference, and different persons are significant difference.
Table 2 supplies the final residue amount of examination agricultural chemicals
Annotate: ND representes not detect.
Brief summary
The present invention relate to a kind of effective prescription that is used to prevent and treat rice blast, it is made up of Prochloraz and Isoprothiolane.Result according to field experiment can learn that the present invention has the better prevention effect to rice blast, and medicine 21d preventive effect can reach about 90%; This mixture is environmentally safe, in paddy rice and rice field, does not have residual or residual very lowly, can promote the use of.
Show through indoor co-toxicity coefficient determination test that the more different proportionings of spring Prochloraz Isoprothiolane are carried out statistical analysis to the test of rice blast fungus mycelial growth and spore germination, its result is respectively shown in table 3 and table 4.
The combination of table 3 Prochloraz Isoprothiolane is to the inhibitory action of rice blast fungus mycelial growth
The combination of table 4 Prochloraz Isoprothiolane is to the inhibitory action of rice blast fungus spore germination
According to learning of table 3 and table 4, the present invention all has significant inhibitory effect to rice blast fungus mycelial growth and spore germination, the different proportionings of Prochloraz Isoprothiolane; Except 1:1 and 1:2, rice blast fungus mycelial growth (table 3) and spore germination (table 4) all there is significant inhibitory effect; Especially the co-toxicity coefficient that with the proportioning is 1:10 is high, and synergistic effect is obvious, is the low-toxin farm chemicals prescription; Decompose easily; Environmentally safe, in rice plant, paddy and rice field, do not have residual or residual very lowly, can on rice crop, use safely.
Owing to adopted technique scheme, compared with prior art, the present invention is through carrying out composite using with Prochloraz and two kinds of medicaments of Isoprothiolane; Make them have synergistic effect, overcome the drug-fast problem of pesticide resistance rice blast pathogen to single spring Prochloraz or Isoprothiolane, control efficiency can reach about 90%; Especially the pathogen that Prochloraz or Isoprothiolane is developed immunity to drugs; Control efficiency is more remarkable, can effectively reduce the consumption of agricultural chemicals, has not only reduced labour intensity; Provide cost savings, solve the problem of lavishment agricultural chemicals.The present invention is simple, and material source is extensive, and is with low cost, and result of use is good.
Embodiment
Embodiments of the invention 1: the agricultural chemicals of control rice blast, comprise Prochloraz and Isoprothiolane, the mass ratio of Prochloraz and Isoprothiolane is 1:3.
Embodiments of the invention 2: the agricultural chemicals of control rice blast, comprise Prochloraz and Isoprothiolane, the mass ratio of Prochloraz and Isoprothiolane is 1:4.
Embodiments of the invention 3: the agricultural chemicals of control rice blast, comprise Prochloraz and Isoprothiolane, the mass ratio of Prochloraz and Isoprothiolane is for being 1:6.
Embodiments of the invention 4: the agricultural chemicals of control rice blast, comprise Prochloraz and Isoprothiolane, the mass ratio of Prochloraz and Isoprothiolane is for being 1:10.
Embodiments of the invention 5: the agricultural chemicals of control rice blast, comprise Prochloraz and Isoprothiolane, the mass ratio of Prochloraz and Isoprothiolane is 1:11.
In the above-described embodiments, to select mass percent for use be 45% prochloraz aqueous emulsion (Shenzhen Nuopuxin Agricultural Chemical Co., Ltd) to Prochloraz; It is 40% Isoprothiolane missible oil (east, Chongqing agricultural chemicals Co., Ltd) that Isoprothiolane is selected mass percent for use.Their mass ratio is meant the mass ratio of the active ingredient of product.
Claims (2)
1. agricultural chemicals of preventing and treating rice blast, it is characterized in that: comprise Prochloraz and Isoprothiolane, the mass ratio of Prochloraz and Isoprothiolane is 1:3～11.
2. the agricultural chemicals of control rice blast according to claim 1 is characterized in that: comprise Prochloraz and Isoprothiolane, the mass ratio of Prochloraz and Isoprothiolane is 1:10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012103633257A CN102823613A (en) | 2012-09-26 | 2012-09-26 | Pesticide for controlling pyricularia oryzae |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103633257A CN102823613A (en) | 2012-09-26 | 2012-09-26 | Pesticide for controlling pyricularia oryzae |
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| CN102823613A true CN102823613A (en) | 2012-12-19 |
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| CN2012103633257A Pending CN102823613A (en) | 2012-09-26 | 2012-09-26 | Pesticide for controlling pyricularia oryzae |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104642369A (en) * | 2015-02-09 | 2015-05-27 | 安徽海日农化有限公司 | Prochloraz and isoprothiolane compound missible oil and preparation method thereof |
| CN109168959A (en) * | 2018-10-30 | 2019-01-11 | 江苏省农业科学院 | A kind of field investigation and calculation method of bag-cultivated edible fungi acarid |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101617687A (en) * | 2009-08-11 | 2010-01-06 | 车志忠 | Sterilization compounded agent |
-
2012
- 2012-09-26 CN CN2012103633257A patent/CN102823613A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101617687A (en) * | 2009-08-11 | 2010-01-06 | 车志忠 | Sterilization compounded agent |
Non-Patent Citations (2)
| Title |
|---|
| 刘耀帮等: "贵州省水稻稻瘟病菌对四种杀菌剂的敏感性测定", 《山地农业生物学报》 * |
| 李杨等: "水稻稻瘟病菌研究进展", 《广西农业科学》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104642369A (en) * | 2015-02-09 | 2015-05-27 | 安徽海日农化有限公司 | Prochloraz and isoprothiolane compound missible oil and preparation method thereof |
| CN109168959A (en) * | 2018-10-30 | 2019-01-11 | 江苏省农业科学院 | A kind of field investigation and calculation method of bag-cultivated edible fungi acarid |
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Application publication date: 20121219 |