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The application of the invasive weed Wedelia in killing the larvae of Spodoptera litura

A technology for Spodoptera litura and Wee chrysanthemum, which is applied in an environment-friendly field, can solve problems such as economic losses, and achieves the effects of good larval effect, convenient farmer field operation, and simple and easy-to-operate method.

Active Publication Date: 2018-11-06
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

South American Wedelia ( Wedelia trilobata ) is an alien weed that has invaded South China, and has also caused economic losses in South my country

Method used

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  • The application of the invasive weed Wedelia in killing the larvae of Spodoptera litura

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The invention relates to a method for killing the larvae of the pest Spodoptera litura by the foreign invasive weed Wedelia chinensis, and the specific steps include:

[0019] (1) Gather the leaves of Wedelia chinensis, dry them in the sun and crush them into powder. Take 50 g of dry leaf powder and soak it in 1 L of tap water, stir frequently during this period, soak it for 48 h, and filter it with gauze to obtain the extract of Wedelia chinensis.

[0020] (2) Spray the prepared wedelia extract directly on the crops damaged by Spodoptera litura larvae, which is suitable for young Spodoptera litura larvae. Spraying the extract of Wedelia chinensis is not optional in rainy weather to prevent the extract from being washed away by rain. Spray once a week, and after about three times, the young larvae of Spodoptera litura can be killed. If the larvae are larger, continue spraying for 2-3 times to achieve the effect of killing Spodoptera litura larvae.

[0021] The method...

Embodiment 2

[0023] The invention relates to a method for killing the larvae of the pest Spodoptera litura by the foreign invasive weed Wedelia chinensis, and the specific steps include:

[0024] (1) Gather the leaves of Wedelia chinensis, dry them in the sun and crush them into powder. Take 100 g of dry leaf powder and soak it in 1 L of tap water, stir frequently during this period, soak it for 72 h, and filter it with gauze to obtain the extract of Wedelia chinensis.

[0025] (2) Spray the prepared wedelia extract directly on the crops damaged by Spodoptera litura larvae, which is suitable for young Spodoptera litura larvae. Spraying the extract of Wedelia chinensis is not optional in rainy weather to prevent the extract from being washed away by rain. Spray once a week, and after about three times, the young larvae of Spodoptera litura can be killed. If the larvae are larger, continue spraying for 2-3 times to achieve the effect of killing Spodoptera litura larvae.

[0026] The metho...

Embodiment 3

[0028] The invention relates to a method for killing the larvae of the pest Spodoptera litura by the foreign invasive weed Wedelia chinensis, and the specific steps include:

[0029] (1) Gather the leaves of Wedelia chinensis, dry them in the sun and crush them into powder. Take 200 g of dry leaf powder and soak it in 1 L of tap water, stir frequently during the period, soak it for 72 h, and filter it with gauze to obtain the extract of Wedelia chinensis.

[0030] (2) Spray the prepared wedelia extract directly on the crops damaged by Spodoptera litura larvae, which is suitable for young Spodoptera litura larvae. Spraying Wedelia extract is not an option in rainy weather to prevent the extract from being washed away by rain. Spray once a week, and after about three times, the young larvae of Spodoptera litura can be killed. If the larvae are larger, continue to spray 2-3 times, and the effect of killing Spodoptera litura larvae can also be achieved.

[0031] The method prov...

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Abstract

The invention discloses application of invasive weed Wedelia trilobata to killing of prodenia litura larvae and belongs to the environment-friendly technical field of killing pests by using invasive plant resources. Wedelia trilobata extract solution is applied to crops to directly kill prodenia litura larvae. The invasive weed Wedelia trilobata which is commonly seen in South China areas is used to realize reasonable and effective development and utilization of plant resources; dry leaf weight of Wedelia trilobata used in the preparation of the Wedelia trilobata extract solution is 50 to 200g. By using the invasive weed Wedelia trilobata to effectively kill the agricultural pest prodenia litura larvae, the operation is simple and easy to perform, the effect is good, the cost is extremely low and the method is a healthy, pollution-free, environment-friendly and ecological method for preventing and controlling agricultural pests.

Description

technical field [0001] The invention belongs to the environment-friendly technical field of using plant resources to kill insects, and in particular relates to an application method of the foreign invasive weed Wedelia in killing pest Spodoptera litura larvae. Background technique [0002] Spodoptera litura is an omnivorous agricultural pest widely distributed in my country. Its larvae eat a variety of crops, eat plant leaves, flowers and fruits, and often eat all the plant leaves, leaving only the main veins and excreting feces. Causes pollution, and it can reproduce 4-5 generations a year, and it is intermittently rampant and harmful, causing huge economic losses to my country's agriculture. At present, the main method of controlling Spodoptera litura in my country is to use chemical insecticides. However, the use of pesticides will not only cause pesticide residues on crops, endangering the health of humans and animals, but also enter the soil and rivers through the erosi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N65/12A01P7/04A01G13/00
CPCA01G13/00A01N65/00A01N65/12
Inventor 祁珊珊戴志聪陈琪王宁付伟宋由页黄凯杜道林
Owner JIANGSU UNIV
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