A kind of composition of anti-Powdery Mildew in Tobacco
Technical field
Composition more particularly to a kind of composition of anti-Powdery Mildew in Tobacco the present invention relates to a kind of anti-tobacco common disease.
Background technology
Powdery Mildew in Tobacco is the fungal disease as caused by Ascomycotina Sphaerotheca fungal infection, and in China, each cigarette district is equal
There is generation.Powdery mildew germ is mostly ectoparasitism, and all or greatly portion is exposed to the surface of host plant to mycelium, just first during morbidity
Subcircular powdery bloom is generated on blade, rear to merge powdering spot, scab is covered with blade when serious, and blade is caused to dry up or take off
It falls, economic value is lost in leaf tissue necrosis.Powdery Mildew in Tobacco is under appropriate temperature conditions, it is easy to outbreak of epidemic, with sky
Gas relative humidity increases onset speed quickening, the higher morbidity of relative air humidity relative air humidity model that is heavier, and falling ill
Enclose width.
At present, China is main plants not mildew-resistances such as tobacco bred K326, NC89, encounters long-time rainfall or growing way
Cross prosperous, vega density is big, ventilative translucency difference when Powdery Mildew in Tobacco occur it is more serious, loss it is larger.Although by strengthening field
Cultivation management can mitigate the occurrence injury of Powdery Mildew in Tobacco, but it is still the master that China tobacco grower prevents the disease to use chemical agent at present
Want measure.Chemical agent has certain toxicity, and easily residual.
Invention content
The purpose of the present invention is to provide a kind of composition of anti-Powdery Mildew in Tobacco, to the control effect of Powdery Mildew in Tobacco compared with
It is good, and safe noresidue, it is more environmentally-friendly.
The present invention is achieved through the following technical solutions:
A kind of composition of anti-Powdery Mildew in Tobacco includes the raw material of following weight proportioning:
3-10 parts of valine, 100-128 parts of magnesium sulfate, 75-90 parts of calcium chloride, 32-57 parts of yellow cinnamon leaf, Monochoria vaginalis 25-44
Part;
Preparation method is:Magnesium sulfate is dissolved in water and is made into the solution that mass fraction is 1.9-3.2%, after adding drying
Monochoria vaginalis herb, decoct 30-40min after add in fresh yellow cinnamon leaf, continue decoct 3-5h, be subsequently cooled to room temperature, to decoct
Calcium chloride is first added in boil liquid, adds valine, is stirred evenly, stands 10-13d, filtering, the solid obtained after filtrate drying
Be crushed to 200 mesh to get.
The valine of special ratios, magnesium sulfate, calcium chloride, yellow cinnamon leaf, Monochoria vaginalis are to Powdery Mildew in Tobacco in inventive formulation
With preferable preventive effect, disease index can be reduced;With reference to the production technology of the present invention, the prevention to powdery mildew can further improve
Effect ensures the yield and quality of tobacco.
The advantage of the invention is that:It is preferable to the control effect of Powdery Mildew in Tobacco, disease index, and safety can be significantly reduced
Noresidue, it is more environmentally-friendly.
Specific embodiment
Embodiment 1:A kind of composition of anti-Powdery Mildew in Tobacco includes the raw material of following weight proportioning:7 parts of valine, sulphur
Sour 118 parts of magnesium, 82 parts of calcium chloride, 37 parts of yellow cinnamon leaf, 34 parts of Monochoria vaginalis;
Preparation method is:Magnesium sulfate is dissolved in water and is made into the solution that mass fraction is 2.2%, adds dried duck
Tongue grass herb adds in fresh yellow cinnamon leaf after decocting 35min, continues to decoct 4h, is subsequently cooled to room temperature, first adds into decoction liquor
Entering calcium chloride, add valine, stir evenly, stand 11d, filtering, the solid obtained after filtrate drying is crushed to 200 mesh,
To obtain the final product.
Embodiment 2:A kind of composition of anti-Powdery Mildew in Tobacco includes the raw material of following weight proportioning:3 parts of valine, sulphur
Sour 100 parts of magnesium, 75 parts of calcium chloride, 32 parts of yellow cinnamon leaf, 25 parts of Monochoria vaginalis;
Preparation method is:Magnesium sulfate is dissolved in water and is made into the solution that mass fraction is 3.2%, adds dried duck
Tongue grass herb adds in fresh yellow cinnamon leaf after decocting 30min, continues to decoct 3h, is subsequently cooled to room temperature, first adds into decoction liquor
Entering calcium chloride, add valine, stir evenly, stand 10d, filtering, the solid obtained after filtrate drying is crushed to 200 mesh,
To obtain the final product.
Embodiment 3:A kind of composition of anti-Powdery Mildew in Tobacco includes the raw material of following weight proportioning:10 parts of valine, sulphur
Sour 128 parts of magnesium, 90 parts of calcium chloride, 57 parts of yellow cinnamon leaf, 44 parts of Monochoria vaginalis;
Preparation method is:Magnesium sulfate is dissolved in water and is made into the solution that mass fraction is 1.9%, adds dried duck
Tongue grass herb adds in fresh yellow cinnamon leaf after decocting 40min, continues to decoct 5h, is subsequently cooled to room temperature, first adds into decoction liquor
Entering calcium chloride, add valine, stir evenly, stand 13d, filtering, the solid obtained after filtrate drying is crushed to 200 mesh,
To obtain the final product.
Embodiment 4:A kind of composition of anti-Powdery Mildew in Tobacco, preparation method are:Magnesium sulfate is dissolved in water and is made into quality
Score is 1.2% solution, adds dried Monochoria vaginalis herb, adds in fresh yellow cinnamon leaf after decocting 50min, continues to decoct
6h is boiled, is subsequently cooled to room temperature, valine is first added in into decoction liquor, adds calcium chloride, is stirred evenly, stands 14d, mistake
Filter, after filtrate drying obtained solid be crushed to 200 mesh to get.
Remaining is the same as embodiment 1.
Test example:Field control effectiveness test carries out in great Tang villages of Sensing Technique in Xingguo County, Jiangxi Province Changgong township, 5 processing is set altogether, including 1
Blank control group and 4 experimental groups, experimental group respectively as 0.5kg/ mus dosage apply embodiment 1-4 made from medicament, medicament
It sprays after being made into aqueous solution, when spray accomplishes that complete stool blade is just regurgitated.It is arranged by random district's groups, 20 ㎡ of plot area,
Protection row, 4 repetitions are set between each processing.Using artificial infection Powdery Mildew in Tobacco bacterium, normal tobacco seedlings is made to fall ill, in tobacco white powder
Sick early stage investigates disease index, then carries out the 1st dispenser, second of dispenser is carried out after 10d.10d after second of dispenser
The investigation morbidity number of sheets and occurring degree, calculate disease index and control effect.Incidence of leaf is divided into 0-9 grades, and grade scale is (with leaf
Piece is unit) be:
0 grade:Blade disease-free spot;1 grade:Lesion area accounts for less than the 5% blade gross area;3 grades:It is total that lesion area accounts for blade
The 6-10% of area;5 grades:Lesion area accounts for the 11-20% of the blade gross area;7 grades:Lesion area accounts for the 21- of the blade gross area
40%;9 grades:Lesion area account for the blade gross area 41% and more than or blade because disease due to severe shrinkage.
Disease index=[Σ (the disease number of sheets × this grade of grade value at different levels)/(investigation total number of sheets × 9)] × 100;
Control effect=[1- (disease index after disease index × chemicals treatment district dispenser before blank district dispenser)/
(disease index before disease index × chemicals treatment district dispenser after blank district dispenser)] × 100%.
1 Powdery Mildew in Tobacco therapeutic effect of table compares