Application of invasive weed Wedelia trilobata to killing of prodenia litura larva
A technology for Spodoptera litura and Wee chrysanthemum, which is applied in an environment-friendly field, can solve problems such as endangering human and animal health, ecological pollution, pesticide residues, etc., and achieves the effects of being convenient for farmers to operate in the field, easy to operate, and low in cost.
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Embodiment 1
[0018] The present invention is a method for killing the pest Spodoptera litura larvae by the invasive weed of South American Wedelia Wedelia, and the specific steps include:
[0019] (1) Collect South American Wedelia leaves, sun-dried and smashed into powder. Take 50 g of dry leaf powder and soak in 1 L of tap water, stir frequently during the period, and filter with gauze after soaking for 48 hours to obtain Wedelia chinensis extract.
[0020] (2) Spray the prepared South American Wedelia chrysanthemum extract directly on the crops damaged by Spodoptera litura larvae, which is suitable for Spodoptera litura larvae in the young stage. Spraying the Wedelia chrysanthemum extract is not optional in rainy weather to prevent the extract from being washed away by rain. Spray once a week, about three times later, it can kill the young larvae of Spodoptera litura. If the larvae are larger, you can continue to spray 2-3 times to achieve the effect of killing Spodoptera litura larvae.
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Embodiment 2
[0023] The present invention is a method for killing the pest Spodoptera litura larvae by the invasive weed of South American Wedelia Wedelia, and the specific steps include:
[0024] (1) Collect South American Wedelia leaves, sun-dried and smashed into powder. Take 100 g of dry leaf powder and soak it in 1 L of tap water, stir frequently during the period, and filter with gauze after soaking for 72 hours to obtain the Wedelia chrysanthemum extract.
[0025] (2) Spray the prepared South American Wedelia chrysanthemum extract directly on the crops damaged by Spodoptera litura larvae, which is suitable for Spodoptera litura larvae in the young stage. Spraying the Wedelia chrysanthemum extract is not optional in rainy weather to prevent the extract from being washed away by rain. Spray once a week, about three times later, it can kill the young larvae of Spodoptera litura. If the larvae are larger, you can continue to spray 2-3 times to achieve the effect of killing Spodoptera litur...
Embodiment 3
[0028] The present invention is a method for killing the pest Spodoptera litura larvae by the invasive weed of South American Wedelia Wedelia, and the specific steps include:
[0029] (1) Collect South American Wedelia leaves, sun-dried and smashed into powder. Take 200 g of dry leaf powder and soak it in 1 L of tap water, stir frequently during the period, and filter with gauze after 72 hours of soaking to obtain Wedelia chinensis extract.
[0030] (2) Spray the prepared South American Wedelia chrysanthemum extract directly on the crops damaged by Spodoptera litura larvae, which is suitable for Spodoptera litura larvae in the young stage. Spraying the Wedelia chrysanthemum extract is not optional in rainy weather to prevent the extract from being washed away by rain. Spray once a week, about three times later, it can kill the young larvae of Spodoptera litura. If the larvae are larger, you can continue to spray 2-3 times to achieve the effect of killing Spodoptera litura larvae....
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