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A method of controlling corn armyworm by using nano silicon quantum dots

A technology of nano-silicon quantum dots and corn armyworm, applied in pest control, nanotechnology, chemical instruments and methods, etc., can solve the problems of heavy metal toxicity, environmental pollution, etc., increase biomass, improve total phenols and chlorogenic The effect of increasing the content of chlorogenic acid and increasing the content of chlorogenic acid

Active Publication Date: 2021-08-24
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although metal-based nanoparticles have a high insecticidal effect, the release of large doses of metal-based nanoparticles (such as nano-silver and nano-copper) into the environment will also lead to heavy metal toxicity and eventually cause environmental pollution risks

Method used

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  • A method of controlling corn armyworm by using nano silicon quantum dots
  • A method of controlling corn armyworm by using nano silicon quantum dots
  • A method of controlling corn armyworm by using nano silicon quantum dots

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A preparation method of nano-silicon quantum dots, comprising the steps of:

[0036] Weigh 2.3g of ascorbic acid and dissolve it in 8.0mL of water, then add 2.0mL of N-aminoethyl-3-aminopropylmethyldimethoxysilane, mix well at 80°C, and then stir in a water bath at 80°C for 8h to react; After the reaction, use a dialysis bag (1kDa, molecular weight cut-off) to remove excess reactants; then the solution after dialysis was centrifuged at 4°C, 10000r / min for 20min; the precipitate was dried to obtain nano-silicon quantum dots.

[0037] The size of the nano-silicon quantum dots obtained is 5nm, and the shape is spherical (such as figure 1 ), the surface has functional groups such as -OH and -NH ( figure 2 ), the hydrated diameter is about 42.9nm, and the surface charge is 10.6eV.

Embodiment 2

[0039] A method for controlling corn armyworm using nanometer silicon quantum dots, comprising the steps of:

[0040] (1) Disinfect corn seeds (Suyu 29) from Jiangsu Academy of Agricultural Sciences in 5% sodium hypochlorite solution for 10 minutes, then rinse with deionized water 3 times for disinfection;

[0041] (2) After the disinfection is completed, soak the corn seeds in deionized water for 4 hours, then put the corn seeds into a petri dish with damp filter paper, cultivate them under dark conditions in the greenhouse, and spray water regularly every day;

[0042] (3) After cultivating for 5 days, select the corn seeds that germinate evenly, and transfer to the pots and pots that 1.0Kg of soil is housed to grow;

[0043](4) When the corn seedling grows to three leaves and one heart, the aqueous solution 20mL of the nano-silicon quantum dot (embodiment 1) of 50mg / L is sprayed on the leaf surface; Worm (Keyun Biology), the growth and development of armyworm were evaluate...

Embodiment 3

[0046] Adjust the concentration of the aqueous solution of nano-silicon quantum dots (embodiment 1) in embodiment 2 to be 10, 150mg / L, and others are consistent with embodiment 2.

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Abstract

The invention discloses a method for controlling corn armyworm by using nanometer silicon quantum dots, and belongs to the technical field of nanometer material prevention and control of crop pests. The method of using nano-silicon quantum dots in the present invention to prevent and control corn armyworm, the method is to prepare nano-silicon quantum dots as an aqueous solution of nano-silicon quantum dots, and then apply them to plant roots or leaves as plant fertilizers; wherein the The concentration of the aqueous solution of the nano-silicon quantum dots is 10-150mg / L; the size of the nano-silicon quantum dots is 3-8nm. The method of the present invention not only improves the effect of conventional silicon fertilizers on plant stress resistance, but also directly improves the direct insecticidal effect of nano-silicon and the improvement of the plant's own chemical defense ability; by spraying different concentrations of nano-silicon quantum dots The optimal spraying amount of nano-silicon quantum dots was established in the growth and development experiment of armyworm.

Description

technical field [0001] The invention relates to a method for controlling corn armyworm by using nanometer silicon quantum dots, and belongs to the technical field of crop pest nanometer material prevention and control. Background technique [0002] Armyworm (Mythimna separata) belongs to Lepidoptera Noctuidae. It is a typical seasonal long-distance migratory pest, and it is also a major pest of food crops in my country and other Asian and Australian countries. It has a wide range of occurrence, multiple generations of damage, There are many types and tissues of the affected crops, heavy yield loss and long history of damage. At present, our country mainly relies on chemical pesticides in the prevention and control of armyworms, but the unscientific application of traditional pesticides has increasingly prominent negative effects on the ecological environment, human health and biodiversity. For example, the extensive use of chemical pesticides has caused serious air, soil and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N59/00A01P7/04A01P21/00C01B33/027C01B33/037B82Y40/00
CPCA01N59/00C01B33/027C01B33/037B82Y40/00C01P2004/04C01P2004/64C01P2002/82
Inventor 王震宇肖正高王传洗乐乐
Owner JIANGNAN UNIV
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