A method for controlling rice blast and sheath blight by intercropping arrowroot in rice fields

Abstract

The invention discloses a method for controlling rice blast and sheath blight by intercropping sagittaria sagittifolia in a rice field, and particularly relates to a method for planting rice and sagittaria sagittifolia in an intercropping way and harvesting mature rice and mature sagittaria sagittifolia in sequence. Field experiment results prove that with intercropping, rice and sagittaria sagittifolia have the symbiotic period in the field, so that the rice sheath blight infection rate of the rice intercropping cultivation is lower than that of rice monoculture; in an elongation stage, a heading stage, a filling state and a milk-ripe stage, the disease occurrence rates of the rice intercropping cultivation are respectively lower than that of the rice monoculture by 64.29%, 88.24%, 25% and 60%; furthermore, the rice blast infected leaf rate of the rice intercropping cultivation is lower than that of the rice monoculture on the whole, and the average control effect reaches up to 31.33%. Compared with the prior art, the method does not use chemical pesticides when being used for controlling the rice sheath blight and the rice blast, thus having obvious ecological economic benefits and guaranteeing the safe production of agricultural products; furthermore, field operation is convenient, and thus the method is convenient for actual popularization and application.

Description

technical field [0001] The invention relates to the field of controlling rice diseases by using an ecological agriculture model, in particular to a method for controlling rice blast and sheath blight by intercropping arrowroot in rice fields. Background technique [0002] At present, more than 60% of the population in my country takes rice as the staple food. In order to meet the needs of food production and the development of economic interests, most rice cultivation is carried out in a single and intensive manner, which leads to an increasing trend of decreasing biodiversity in farmland ecosystems. Strengthening, often lead to damage and loss of ecosystem balance and frequent occurrence of pests and diseases. According to the estimates of the Food and Agriculture Organization of the United Nations, the annual loss due to diseases accounts for about 10% of the total grain output in the world. In order to prevent and control diseases, a large amount of pesticide input not on...

AI Technical Summary

Problems solved by technology

In order to prevent and control diseases, a large amount of pesticide input not only increases the resistance of bacteria, but also brings environmental pollution and pesticide residues in agricultural products.

At present, there is no report that Sagittarius and rice have common diseases, and it has not been reported to control rice field diseases through the ecological agricultural planting method of making Sagittarius in the middle of the rice field

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