Carpesium fruit extract for preventing and controlling crop insects

A technology for extracts and plant-derived extracts, which is applied in the field of biological pesticide development to achieve the effects of reducing environmental risks, solving the problem of large dosage and various modes of action.

Inactive Publication Date: 2010-10-13
JIANGSU ACADEMY OF AGRICULTURAL SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Crane lice (Common Carpesium Fruit) is the dried and mature fruit of Carpesium abrotanoides L., a plant of Compositae. It is mainly used in medicine to kill insects and eliminate ac

Method used

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  • Carpesium fruit extract for preventing and controlling crop insects
  • Carpesium fruit extract for preventing and controlling crop insects
  • Carpesium fruit extract for preventing and controlling crop insects

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Indoor bioassay results (Table 1) show that 13 Chinese herbal medicines have good insecticidal effects on brown planthoppers, among which the crane lice was first reported for the control of agricultural pests, and it is a new type of plant-derived extract. The ethanol and petroleum ether extracts of crane lice have strong contact activity against brown planthopper, and can kill all test insects after 24 hours, but the contact activity of its water extract against brown planthopper is low, and the corrected mortality rate reaches 34.21% after 96 hours . It shows that the ethanol and petroleum ether extracts of crane lice have strong contact activity against brown planthopper.

[0029] Table 113 Contact activity of Chinese herbal medicine extracts on 3rd instar nymphs of brown planthopper a)

[0030] Table 1 Contact activity of extracts of 13 Chinese traditional herbal plants to the 3rd nymphs of Nilaparvatalugens

[0031]

[0032] a) The dosage is 0.8g / ml, the sam...

Embodiment 2

[0035] The indoor bioassay results (Table 2) showed that the ethanol and petroleum ether extracts of crane lice could kill all the tested SBPH after 24 hours. It shows that the ethanol and petroleum ether extracts of crane lice have strong contact activity against SBPH.

[0036] Table 2 The contact activity of crane lice extracts on the 3rd instar nymphs of SBPH

[0037] Table 2 Contact activity of extracts of Common Carpesium Fruit to the 3rd nymphs of Laodelphgax striatellus

[0038]

Embodiment 3

[0040] The indoor test results showed that the LC of the petroleum ether extract of the crane lice on the 3rd instar nymphs of the brown planthopper 50 The relative toxicity is 0.0038g / ml, and the relative toxicity is 21.7, which shows that the crane louse has a high contact activity to the brown planthopper.

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Abstract

The invention relates to an environment-friendly botanical pesticide for efficiently preventing and controlling the rice planthoppers, wherein the insecticidal active ingredient is a solvent extract such as petroleum ether, chloroform, ethanol and the like of the carpesium. The botanical insecticidal active ingredient has the advantages of: (1) having strong contact activity against the rice planthoppers and completely killing the rice planthoppers within 24 h, (2) preventing a plurality of pests such as brown planthoppers, small planthoppers, spodoptera exigua and aphid, and (3) replacing the chemical pesticide and reducing biological environment pollution and the chemical pesticide residues in rice and aquatic products as a natural botanical component.

Description

1. Technical field [0001] The invention belongs to the field of biopesticide development, and uses the extract of crane lice (Carpesium abrotanoides L.) as a novel insecticide to prevent and control rice planthoppers and other agricultural pests. 2. Background technology [0002] The rice planthopper is a major pest of rice, including the brown planthopper (Nilaparvata lugens ), and Laodelphax striatellus Fallén, etc., have the characteristics of sudden, concealed and destructive damage. Not only do they directly suck the damaged plants, but they also spread a variety of plant virus diseases. Since 1982, rice planthoppers have occurred 8 times in my country, causing serious damage to rice production. In the emergency prevention and control measures, chemical control has always occupied the main position, but the long-term and large-scale use of chemical agents not only makes the ecological environment unbalanced, but also makes many pests resistant to chemical agents, resu...

Claims

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Application Information

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IPC IPC(8): A01N65/12A01P7/04
Inventor 方继朝李秀梅刘成社郭慧芳刘宝生王利华
Owner JIANGSU ACADEMY OF AGRICULTURAL SCIENCES
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