A repellent composition for repelling spiders in tobacco fields and its application

Abstract

The present invention belongs to the field of agricultural pest control and specifically relates to a repellent composition for repelling spiders in tobacco fields. The repellent active ingredient comprises three or more of Schisandra chinensis essential oil, Artemisia argyi essential oil, Zanthoxylum bungeanum essential oil, and Mentha arvense essential oil. The repellent composition of the present invention has an excellent repellent effect, and the components exhibit a synergistic effect, which can significantly enhance the synergistic repellent effect and has important significance for the stable development of tobacco production and the improvement of tobacco leaf quality.

Description

Technical Field

[0001] The present invention belongs to the field of agricultural pest control, and particularly relates to a repellent composition for repelling spiders in tobacco fields and an application thereof. Background Art

[0002] As public health and safety awareness grows, industrial enterprises are placing increasing emphasis on cigarette safety and strengthening controls on non-tobacco foreign matter. Strengthening controls on non-tobacco foreign matter is essential for ensuring tobacco product safety and the sustainable and healthy development of the industry. Non-tobacco foreign matter often enters tobacco leaves during field production, harvesting and curing, grading and purchasing, bale storage, secondary inspection and re-curing, and other stages of processing. This can seriously impact the quality and safety of tobacco leaves and negatively impact their market reputation. Foreign tobacco raw material suppliers and domestic industrial enterprises have made non-tobacco foreign matter a key inspection criterion in tobacco leaf inspection and acceptance. Currently, domestic and international control of insect-borne foreign matter in tobacco leaves prior to curing focuses on the direct impact of foreign pests on tobacco leaf yield during the field period, without considering the potential economic losses caused by small amounts of insect-borne foreign matter infiltrating tobacco leaves. In some ways, the loss of product reputation caused by insect-borne foreign matter in tobacco leaves can be more severe than the direct economic losses. Non-tobacco foreign matter refers to all substances other than tobacco leaves and stems.

[0003] There is currently a lack of effective methods for the comprehensive control of insect-borne foreign matter before tobacco leaves are cured, both domestically and internationally, and relevant literature is extremely scarce. Few studies have been reported on this topic. Currently, insect-borne foreign matter is primarily removed manually before and after tobacco leaves are cured, which is labor-intensive and time-consuming, and prone to omission. Chemical control and physical trapping are commonly used to control insect-borne foreign matter during the field season, and these methods are primarily used against tobacco pests such as Spodoptera litura, tobacco aphids, whiteflies, and leafminers. However, research on foreign matter control techniques for natural predators such as spiders is scarce.

[0004] The most common predatory natural enemy insects in tobacco fields include tobacco aphid parasitic wasps, ladybugs, mantises, dragonflies, assassin bugs, ground beetles, etc., as well as spiders of the order Arachnida. They are the most numerous and the largest in number. They are the main predatory natural enemies of tobacco field pests. Large spiders can prey on 5-10 aphids in the field every day; medium-sized spiders can prey on 3-4 aphids in the field every day; small spiders can also prey on 1-2 aphids every day. They have a significant natural control effect on tobacco field pests and are an indispensable part of ecological pest control in tobacco fields. Compared to other insect predators, spiders have a high reproductive capacity and a long lifespan. Small spiders produce 6-7 generations per year, with each female laying 10-16 egg sacs containing 30-40 eggs per sac and a lifespan of 0.5-1 year. Medium-sized spiders produce 2-3 generations per year, with each female laying 4-8 egg sacs containing around 100 eggs each and a lifespan of 1-2 years. Large spiders lay 1-2 egg sacs, each containing 1,000-2,000 eggs, and a lifespan of 4-7 years. However, the egg sacs laid by female spiders attach to the surface of tobacco leaves, becoming foreign matter and significantly reducing their quality. They also produce odor and irritating gases when smoked, seriously damaging oral health.

[0005] Tobacco dominates tobacco field ecosystems, but tobacco field ecosystems and natural ecosystems are also interconnected through the exchange of materials, species, and energy. Many arthropods have adapted to and established themselves in tobacco field ecosystems, creating a certain degree of dynamic equilibrium between them. Anhui, located in my country's north-south transition zone, has complex ecological conditions and is plagued by severe tobacco pests. This provides a rich food supply for various spiders in tobacco fields, which is conducive to their survival and reproduction. However, during tobacco leaf production and processing, foreign particles such as spider egg sacs can seriously contaminate cigarettes.

[0006] In recent years, with the vigorous implementation of green pest control technologies in tobacco-growing areas in southern Anhui, the use of chemical pesticides in tobacco fields has declined year after year, while the variety and number of natural enemies of tobacco pests have increased significantly. This has significantly improved the ecological environment in tobacco fields, significantly enhancing the quality and safety of tobacco leaves in these areas. Furthermore, after the transplanting of tobacco seedlings, the region has experienced relatively high rainfall, leading to a high incidence of weeds in tobacco fields and providing a favorable habitat for spiders. However, this significant increase in the number of these natural enemies has also created a new problem: the numerous spiders in tobacco fields lay their egg sacs on the leaves of tobacco plants, becoming insect-borne foreign matter in the flue-cured tobacco. In summary, in-depth investigations and research into spider populations in tobacco fields in southern Anhui, and the development of safe and effective ecological control measures for spider egg sacs and other foreign matter in tobacco fields, are crucial for the stable development of tobacco production and the improvement of tobacco leaf quality. Summary of the Invention

[0007] The present invention provides a repellent composition for repelling spiders in tobacco fields and its application. The specific technical solution is as follows:

[0008] A repellent composition for repelling spiders in tobacco fields is characterized in that the repellent active ingredient consists of three or more components of schisandra chinensis essential oil, wormwood essential oil, zanthoxylum essential oil and peppermint essential oil.

[0009] A repellent composition for repelling spiders in tobacco fields, comprising active repellent ingredients comprising schisandra chinensis essential oil, wormwood essential oil, and Zanthoxylum bungeanum essential oil, wherein the volume ratio of the schisandra chinensis essential oil, wormwood essential oil, and Zanthoxylum bungeanum essential oil is 1-5:1-5:1-5. A preferred volume ratio of the schisandra chinensis essential oil, wormwood essential oil, and Zanthoxylum bungeanum essential oil is 1-3:1-3:1-3; and a preferred volume ratio of the schisandra chinensis essential oil, wormwood essential oil, and Zanthoxylum bungeanum essential oil is 1:1:1.

[0010] A repellent composition for repelling spiders in tobacco fields, comprising active repellent ingredients comprising schisandra chinensis essential oil, wormwood essential oil, and peppermint essential oil, wherein the volume ratio of the schisandra chinensis essential oil, wormwood essential oil, and peppermint essential oil is 1-5:1-5:1-5. A preferred volume ratio of the schisandra chinensis essential oil, wormwood essential oil, and peppermint essential oil is 1-3:1-3:1-3; and a preferred volume ratio of the schisandra chinensis essential oil, wormwood essential oil, and peppermint essential oil is 1:1:1.

[0011] A repellent for repelling spiders in tobacco fields comprises a repellent composition placed in a slow-release carrier, wherein the slow-release carrier is any one of a polyethylene tube, a polyvinyl chloride tube, a polyethylene bottle, a polyethylene slow-release bag, a polyvinyl chloride slow-release bag, and a rubber stopper.

[0012] The repellent composition or the repellent agent of the present invention is used for repelling spiders in tobacco fields.

[0013] By adopting the above technical solution, the present invention has the following beneficial effects:

[0014] Compared with garlic essential oil, cinnamon essential oil and clove essential oil, wormwood essential oil, peppermint essential oil, schisandra essential oil and Zanthoxylum bungeanum essential oil have excellent repellent effects on spiders.

[0015] The components of the combination of schisandra essential oil + wormwood essential oil + Zanthoxylum bungeanum essential oil, and the combination of schisandra essential oil + wormwood essential oil + peppermint essential oil have a synergistic effect, which can significantly improve the repellent activity; especially the synergistic repellent effect of the combination of schisandra essential oil + wormwood essential oil + Zanthoxylum bungeanum essential oil is more significant.

[0016] The repellent composition provided by the present invention is used for ecological prevention and control of spiders, and has important significance for the stable development of tobacco production and the improvement of tobacco quality. DETAILED DESCRIPTION

[0017] The present invention will be further explained below with reference to specific embodiments.

[0018] Example 1: Repellent effects of different plant essential oils on tobacco spiders in the field

[0019] Test agent:

[0020]

[0021]

[0022] Test Method: Set up a plot of approximately 150 m² (15 m x 10 m). Mix the plant essential oil with redistilled n-hexane (volume ratio 1:2) and add 6 mL of the mixture to a polyethylene bottle. Use an equal volume of redistilled n-hexane as a blank. Hang the repellent between 9 and 10 AM on a clear day. Remove the sealing film when hanging the repellent, and keep it 0.5 m above the ground. Evenly distribute 12 repellents per plot.

[0023] Survey Method: Use a five-point sampling method, surveying 25 tobacco plants at each location and labeling them. Observe the entire tobacco plant from top to bottom, and from the front to the back of the leaves. Visually inspect the plants from top to bottom, recording the number of spiders. Survey the base number seven times before and after treatment, and calculate the avoidance rate and corrected control efficacy.

[0024] Calculation method:

[0025] Avoidance rate % = (pre-drug base number - post-drug base number) / pre-drug base number * 100;

[0026] Corrected control efficacy % = (treatment reduction rate - blank reduction rate) / (100 - blank reduction rate) * 100;

[0027] Test results:

[0028] Table 1 shows that garlic, wormwood, peppermint, cinnamon, clove, schisandra, and Zanthoxylum bungeanum essential oils exhibit varying degrees of repellent activity against spiders. Schisandra chinensis oil exhibited the highest repellent activity against spiders, at 50.6%. This was followed by wormwood and Zanthoxylum bungeanum oils, at 39.8% and 39.0%, respectively. Peppermint oil came in third, at 36.5%. Cinnamon, clove, and garlic oils exhibited relatively weak repellent activity against spiders, with garlic oil exhibiting only a 17.1% repellent activity.

[0029] Table 1 The repellent effects of different plant essential oils on spiders in the field

[0030]

[0031]

[0032] Example 2: Synergistic effect of different plant essential oil combinations on spider repellency

[0033] Test agent:

[0034]

[0035] Test Method: Set up a plot of approximately 150 m² (15 m x 10 m). Mix the essential oil combination with redistilled n-hexane (volume ratio 1:2). Add 6 mL of the mixture to a polyethylene bottle. Use an equal volume of redistilled n-hexane as a blank. Hang the repellent between 9 and 10 AM on a clear day. Remove the sealing film when hanging the repellent, and keep it 0.5 m above the ground. Evenly distribute 12 repellents per plot.

[0036] Survey Method: Use a five-point sampling method, surveying 25 tobacco plants at each location and labeling them. Observe the entire tobacco plant from top to bottom, and from the front to the back of the leaves. Visually inspect the plants from top to bottom, recording the number of spiders. Survey the base number seven times before and after treatment, and calculate the avoidance rate and corrected control efficacy.

[0037] Calculation method:

[0038] Avoidance rate % = (pre-drug base number - post-drug base number) / pre-drug base number * 100;

[0039] Corrected control efficacy % = (treatment reduction rate - blank reduction rate) / (100 - blank reduction rate) * 100;

[0040] Test Results: As shown in Table 2, the combination of Schisandra chinensis oil, Artemisia argyi oil, and Zanthoxylum bungeanum oil had the highest repellent activity against spiders, at 91.4%. This was followed by the combination of Schisandra chinensis oil, Artemisia argyi oil, and Peppermint oil, which had an 81.9% repellent activity. The combinations of Artemisia argyi oil, Zanthoxylum bungeanum oil, and Peppermint oil, as well as the combinations of Schisandra chinensis oil, Artemisia argyi oil, and Zanthoxylum bungeanum oil, had relatively low repellent effects.

[0041] The components of the combination of schisandra essential oil + wormwood essential oil + Zanthoxylum bungeanum essential oil, and the combination of schisandra essential oil + wormwood essential oil + peppermint essential oil have a synergistic effect, which can significantly improve the repellent activity; especially the synergistic repellent effect of the combination of schisandra essential oil + wormwood essential oil + Zanthoxylum bungeanum essential oil is more significant.

[0042] Table 2 The repellent effects of different plant essential oil combinations on spiders in the field

[0043]

[0044] Finally, it should be noted that the above examples are only some specific embodiments of the present invention, and all variations that can be directly derived or associated with the content disclosed by a person skilled in the art are considered to be within the scope of protection of the present invention.

Claims

1. A repellent composition for repelling spiders in tobacco fields, characterized in that: The repellent active ingredient consists of schisandra chinensis essential oil, wormwood essential oil and zanthoxylum bungeanum essential oil, wherein the volume ratio of schisandra chinensis essential oil, wormwood essential oil and zanthoxylum bungeanum essential oil is 1-5:1-5:1-5.

2. A repellent composition for repelling spiders in tobacco fields, characterized in that: The repellent active ingredient consists of schisandra chinensis essential oil, wormwood essential oil and peppermint essential oil, wherein the volume ratio of schisandra chinensis essential oil, wormwood essential oil and peppermint essential oil is 1-5:1-5:1-5.

3. A repellent for repelling spiders in tobacco fields, characterized in that: The repellent composition according to any one of claims 1 to 2 is placed in a slow-release carrier.

4. The repellent according to claim 3, characterized in that The sustained-release carrier is any one of a polyethylene tube, a polyvinyl chloride tube, a polyethylene bottle, a polyethylene sustained-release bag, a polyvinyl chloride sustained-release bag, and a rubber stopper.

5. Use of the repellent composition according to any one of claims 1 to 2 or the repellent according to claim 3 for repelling spiders in tobacco fields.

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