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A kind of medicament composition and application thereof that can be used for preventing and treating tobacco root black rot

A technology of root black rot and composition, which is applied in the field of pesticides to achieve the effects of slowing down drug resistance and reducing application doses

Active Publication Date: 2020-10-09
INST OF TOBACCO ANHUI ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far there is no report about sodium selenite and its compound combination being used for the prevention and treatment of tobacco root black rot

Method used

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  • A kind of medicament composition and application thereof that can be used for preventing and treating tobacco root black rot

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1 sodium selenite is to the mycelia inhibitory action of tobacco root black rot fungus

[0016] Test method: using the toxic medium method, the tobacco root black rot fungus was activated and inoculated on PDA, and cultivated for 10 days until the mycelia covered the surface of the medium for later use. Accurately weigh the medicament, prepare sodium selenite into concentrations of 1ug / mL, 10ug / mL, 100ug / mL, 1000ug / ml and 10000ug / ml respectively, and use the commonly used antifungal agents carbendazim, prochloraz, pyrazole Azoxystrobin was configured so that the above concentration was used as a positive control, and sterile water was used as a negative control, and it was sterilized under an ultraviolet lamp for later use. Prepare the culture medium according to the ratio of medicine to culture medium 1:10, take out 1m L of medicine solution in a petri dish with a pipette gun, then take 9mL of melted potato agar medium and mix evenly, so that sodium selenite...

Embodiment 2

[0020] Example 2 Sodium Selenite Compound Composition Effects on Mycelia Growth of Tobacco Root Black Rot Fungus

[0021] According to the antibacterial effect of the above agents, sodium selenite, carbendazim, prochloraz and pyraclostrobin were respectively mixed according to the ratio of 1:1, 2:3, 1:4, 1:10, 1:20 For compounding. The growth rate method was used for the test, referring to the method of fungicide single agent, the toxicity regression equation was drawn by DPS data processing, and the EC was calculated. 50 . Then calculate the co-toxicity coefficient (CTC) according to Sun Yunpei's method. When CTC≤80, the composition exhibits antagonistic effect; when 80<CTC<120, the composition exhibits additive effect; when CTC≥120, the composition exhibits synergistic effect.

[0022] Actual Toxicity Index (ATI) = (standard drug EC50 / test drug EC50) × 100

[0023] Theoretical toxicity index (TTI) = Toxicity index of agent A × percentage of A in the mixture + toxicity in...

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PUM

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Abstract

The invention belongs to the field of agricultural agents, and provides an agent composition capable of being used for preventing and curing black rot of tobacco roots and application thereof. The agent composition is prepared from an active ingredient A and an active ingredient B, wherein the active ingredient A is sodium selenite, and the active ingredient B is prochloraz or carbendazim; the weight ratio of the active ingredient A to the active ingredient B can be 1:(1-50). The agent composition has a very good effect of preventing and curing the black rot of the tobacco roots and can effectively retard the agent resistance and reduce the agent applied dosage.

Description

technical field [0001] The invention belongs to the field of pesticides, and in particular relates to a pharmaceutical composition for preventing and treating tobacco root black rot and an application thereof. Background technique [0002] Tobacco root black rot is a fungal disease caused by Thielaviopsis basicola that seriously endangers tobacco production in the world. T.basicola is widely distributed in major tobacco-producing areas in the world, and is very harmful and difficult to control. The diseased residue and the soil with bacteria are the primary infection source of the disease. When the conditions are suitable, the conidia or chlamydia spores germinate to produce invasive filaments and invade the epidermal cells of the host from the wound. Spores and chlamydospores for reinfection. Due to the lack of specific agents and resistant varieties, and relatively single control agents such as carbendazim and thiophanate-methyl, the control of tobacco root black rot is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N59/02A01N47/38A01N47/18A01N47/24A01P3/00
CPCA01N47/18A01N47/24A01N47/38A01N59/02
Inventor 许大凤檀根甲周本国朱启法汪文杰裴洲洋陈志强
Owner INST OF TOBACCO ANHUI ACADEMY OF AGRI SCI
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