Compound schima superba preparation for resisting rice blast and preparation thereof

Abstract

The invention discloses a compound Schima superba Gardn.et Champ rice blast resistant preparation and a preparation method. The preparation adopts the leaves of Schima superba Gardn.et Champ and synergist (the leaves of Camellia oleifera Abel or the fruit of Sapindus mulorossi Gaertn) as raw materials. After crushing, the leaves of Schima superba Gardn.et Champ and the synergist X are mixed by the weight proportion of 3 portions of the leaves of Schima superba Gardn.et Champ and 4-20 portions of the leaves of Camellia oleifera Abel X or 1.6-40 portions of the fruit of Sapindus mulorossi Gaertn X. The mixture then is extracted by 80% of ethanol. Exacting solution is extracted by petroleum ether, ethyl acetate one after another. Raffinate is made into the preparation by adding pesticide auxiliary agents (alkyl polyoxyethylene ether sulphonates or lauryl sodium sulphonate), wherein the weight ratio of the mixed extraction of the Schima superba Gardn.et Champ leaves and the synergist is 15 percent- 25 percent. The invention has the advantages of strong anti-pathogenic activity to the rise blast, environmental protection, low toxicity, and that pesticide resistance is not easy to be generated, the comprehensive utilization of resources is convenient and the invention is suitable for scale production.

Description

technical field [0001] The invention relates to biological pesticides, in particular to a compound Schima superba anti-rice blast preparation and a preparation method thereof. technical background [0002] Rice is the main food crop in my country, and rice blast is the main disease of rice. The main problems are: 1. The rice blast pathogen (Pericularia oryzae) has a long incubation period; 2. There are many diseased parts: seedling blast, leaf blast, leaf pillow blast, Ear blast, branch blast and grain blast, etc.; 3. Wide distribution: it can occur in almost all rice areas; 4. Serious damage: it generally leads to a 10% to 20% reduction in rice production, and the severe one can reach 40% to 50%. , especially heavy fields or even no harvest. In recent years, rice blast has also shown a trend of frequent occurrence, recurrence and outbreak in our province. At present, the prevention and control of rice blast is mainly based on the selection of high-yield and disease-suppress...

AI Technical Summary

Problems solved by technology

[0002] Rice is the main food crop in my country, and rice blast is the main disease of rice. The main problems are: 1. The rice blast pathogen (Pericularia oryzae) has a long incubation period; 2. There are many diseased parts: seedling blast, leaf blast, leaf pillow blast, Ear blast, branch blast and grain blast, etc.; 3. Wide distribution: it can occur in almost all rice areas; 4. Serious damage: it generally leads to a 10% to 20% reduction in rice production, and the severe one can reach 40% to 50%. , particularly heavy fields or even no harvest

However, botanical pesticides often have disadvantages such as low activity, short duration of efficacy, and high production costs.