Method for improving leaf disease resistant sugarcane new strain breeding efficiency

The invention belongs to the field of sugarcane hybrid strain breeding, and discloses a method for improving leaf disease resistant new sugarcane strain breeding efficiency, which comprises the following steps: uniformly mixing sugarcane hybrid seeds with fine sand according to combination, uniformly spreading the mixture in a self-made culture frame, and watering in the morning and evening until seedlings emerge; after seedlings emerge, the sunshade net is uncovered, the humidity of the culture medium is controlled, a carbendazim wettable powder solution is sprayed, and after leaves are trimmed, an organic water-soluble fertilizer is sprayed; when the sugarcane seedlings grow to have 5-6 true leaves, the sugarcane seedlings are temporarily planted in a hole tray, the hole tray is placed in a greenhouse to be cultivated, and after the leaves are trimmed, organic water-soluble fertilizer is sprayed; after 20 days, investigating the morbidity condition of the seedlings according to the sugarcane leaf disease gr