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Fumigation method used for preventing and curing grain pests and mildew

A technology for insect mold and food, which is applied in the field of fumigation to prevent and control food insect mold, and can solve problems such as toxicity, damage to the central nervous system, and strong irritating gas.

Active Publication Date: 2017-07-25
SHANGHAI INST OF ORGANIC CHEM CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Of course, this commitment will also be implemented in food disinfection; sulfuryl fluoride is a colorless, poisonous, and highly irritating gas at normal temperature and pressure, and its acute toxicity mainly damages the central nervous system and causes convulsions; in addition, it will also Deposits in human bones with cumulative poisoning risk

Method used

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  • Fumigation method used for preventing and curing grain pests and mildew
  • Fumigation method used for preventing and curing grain pests and mildew
  • Fumigation method used for preventing and curing grain pests and mildew

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Embodiment 1: the preparation of fumigant

[0052] 1. Preparation of fumigant 15 (2,2-difluoro-2-(sulfonyl fluoride) cyclopropyl acetate):

[0053]

[0054] Take cyclopropanol (58mg) and add dichloromethane (10mL), dropwise add perfluorosulfonate (1mL) under cooling in an ice-water bath. Extracted with methyl chloride (100mL×2), washed with water (10mL×2), washed with saturated brine (10mL×2), dried over anhydrous sodium sulfate, and evaporated to remove the solvent under pressure to obtain the crude fumigant 15 (2,2-difluoro- 2-(sulfonyl fluoride) cyclopropyl acetate), molar yield 90%; 1 HNMR (CDCl 3 )δ(ppm)2.70(m,1H),0.60(m,2H),0.35(m,2H).LR-ESI:[M+H] + 218.99.

[0055] 2. Preparation of fumigants 16, 17, 18, 19, 20, 21, 22, 23:

[0056] With reference to the preparation method of fumigant 15 in 1, cyclobutanol, cyclopentyl alcohol, menthol, isopulegol, dihydrocarveol, carveol, citronellol, citric alcohol and perfluorosulfonate Reaction, so that the correspon...

Embodiment 2

[0067] Embodiment 2: grain fumigation experiment

[0068] Grain varieties: corn, rice, wheat, soybeans, soybeans, broad beans, potatoes, sweet potatoes, etc.

[0069] Diseases: Aspergillus, Penicillium, Trichoderma, Cladoderma cereus, Rhizopus, Trichoderma, Staphylococcus aureus, Escherichia coli, Bacillus megaterium, Bacillus subtilis and Pseudomonas fluorescens, etc.

[0070] Fumigant: Fumigant 24 ( CAS number: 677-25-8)

[0071] First place the fumigant directly in the petri dish, then place the grain sample on top of the petri dish (which can be realized by setting a fixed frame), and fumigate at room temperature.

[0072] After sampling and monitoring, it is known that after 24 hours of fumigation, there is no mold growth on the grain samples after the above-mentioned fumigation treatment (it was found by microscope inspection), and there is no fumigant residue on the grain samples after the above-mentioned fumigation treatment. (It is known from the detection and ana...

Embodiment 3

[0076] Embodiment 3: grain fumigation experiment

[0077] Grain varieties: corn, rice, wheat, soybeans, soybeans, broad beans, potatoes, sweet potatoes, etc.

[0078] Diseases: Aspergillus, Penicillium, Trichoderma, Cladoderma cereus, Rhizopus, Trichoderma, Staphylococcus aureus, Escherichia coli, Bacillus megaterium, Bacillus subtilis and Pseudomonas fluorescens, etc.

[0079] Fumigant: Fumigant 25 ( CAS number: 754-03-0)

[0080] First load the fumigant on the silica gel particles, then place the silica gel particles in a bag with a mesh on the surface, then place the bag on the bottom of the glass jar, and place the grain sample on top of the bag (can be obtained by placing the bag in the glass jar) A fixed frame is set in the middle to realize), and the airtight glass cylinder is fumigated at room temperature.

[0081] After sampling and monitoring, it is known that after 36 hours of fumigation, there is no mold growth on the grain samples after the above-mentioned fum...

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Abstract

The present invention discloses a fumigation method used for preventing and curing grain pests and mildew. The method comprises the following steps: in an environment from room temperature to 40 DEG C, a fumigant is placed below or / and around grain piles; the fumigant is a compound having a chemical structure shown as a formula I in the description or a formula II in the description. The fumigation method realizes a safe and effective preventing and curing of common pest and mildew harms on the grains, is lowest in environmental pollution and has advantages of being green and environmentally protective. In particular, the fumigation method can realize a one-time treatment on the various grains and molds, bacteria and pests in the same fumigation environment. Besides, the grains after the fumigation treatment can be placed in a granary environment or transportation condition for at least half a year or more without regeneration of the pest and mildew harms. In addition, the method also has advantages of being simple in operation, low in cost, wide in suitable grain varieties and pest and mildew disease ranges.

Description

technical field [0001] The invention relates to a fumigation method for preventing and controlling grain insect mold, and belongs to the technical field of grain preservation. Background technique [0002] At present, my country's annual grain loss and waste is about 100 billion catties, which is roughly equivalent to the annual grain output of Heilongjiang Province, the largest grain-producing province in my country. According to estimates, the total loss and waste of my country's post-production grain storage, transportation, processing and other circulation links is about 70 billion catties, of which only the grain storage link in the circulation process loses about 40 billion catties. The food loss caused by post-production mold in our country cannot be underestimated. Fungal and toxin pollution poses a serious threat to my country's food security. According to Liu Yang, a researcher at the Institute of Agricultural Products Processing of the Chinese Academy of Agricult...

Claims

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Application Information

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IPC IPC(8): A23B9/18C07C309/84
CPCA23B9/18A23V2200/10A23V2300/30C07C309/84
Inventor 姜标张琛陶黎明
Owner SHANGHAI INST OF ORGANIC CHEM CHINESE ACAD OF SCI
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