623 results about "Damping off" patented technology

The present invention relates to a composition for preventing at least one plant disease resulted from infection of plant pathogens and a method for preparing the same. Particularly, the composition contains extract of at least one plant selected from the group consisting of Coptis chinensis Franch., Phellodendron genus plant, Sanguinaria canadensis and Chelidonium majus var. asiaticum which are natural plants having anti-plant pathogen activity or berberine which is purified therefrom. The composition of the present invention can be effectively used for preventing disease pathogens such as plant powdery mildew, anthracnose of pepper, damping-off of cucumber and gray mold rot of strawberry resulted from infection of plant pathogens such as Colletrotrichum gloeosporiodes, Pythium ultimum or Botrytis cinerea. For an alternative method for preparing the composition comprising berberine and / or derivatives thereof, the present invention provides various optimal culture condition and two phases cultivation methods using Phellodendron genus plant.

The invention provides a cold region paddy seedling culture matrix and relates to a paddy seedling culture matrix, and the cold region paddy seedling culture matrix is used for solving the problems of slow seedling emergence of the earlier stage, more irrigation times, serious damping off during the mid-to-late stage of seedling growing and obvious fertilizer removal during the later stage of the seedling when the existing paddy seedling culture matrix is applied in paddy cultivating areas of cold regions. The cold region paddy seedling culture matrix is prepared from edible fungus residues, coal ash, grass carbon, vermiculite and perlite, or ground straw, the coal ash, the grass carbon, the vermiculite and the perlite. The paddy which uses the cold region paddy seedling culture matrix does not need disease preventing and weeding during the seedling culture period, only needs to be irrigated, is convenient to operate, time-saving and labor-saving, has high quality seedlings and stronger stress resistance, no damping off, bacterial wilt and other diseases are caused during the seedling stage, and the seedlings are short and strong, have wide leaves and bright green color. The cold region paddy seedling culture matrix is applied in the paddy field.

The invention discloses a sterilizing blend, comprising hymexazol and mefenoxam with parts ratio by weight being 2.5 to 25:0.5 to 5. The invention has advantages of good control effect to rice wilt in seedling stage, low cost of agricultural chemicals, capability of delaying generation of resistibility, non-pollution to environment as both hymexazol and mefenoxam being low-toxic pesticide, and good control effect to blight, damping-off diseases and root rot diseases of various vegetables and fruits.

Disclosed is a method for cultivating pigment marigolds in the sand of a high and cold region. The method includes the steps that ground temperature rises and watering is sufficient 10 days before sowing; sowing is carried out on a fine day without wind, well-prepared soil is sieved by a sieve to cover a seedbed, a disinfectant is sprayed, a pesticide-clay mixture is scattered, and the seedbed is covered by straw; foliage top-dressing is conducted through DAP adding with water in the seedling stage, ventilation is achieved in a seedling growing greenhouse, films are uncovered, seedling exercising is conduced, seedling bacteria are sprayed so that damping-off can be prevented, soil insects can be trapped and killed by the way that phoxim is stirred and mixed with fried bran, and 200ppm of chlormequat chloride is sprayed for treating moderate seedling growth; compound fertilizer water is watered for facilitating growth, and the seedling age is 45-50 days for transplanting; field planting is carried out, the greenhouse is well built, soil preparation is completed, base fertilizer is fully applied, standard moisture in the soil is arranged according to the soil moisture width of 90cm, ponds are built on the water moisture surface in a twin-row mode according to the row spacing being 70cm and the line spacing being 60cm, film uncovering and seedling exercising are conducted 7 days before transplanting, and powder mancozeb is sprayed for disease prevention; field management is conducted, film rupturing and ridging are carried out, watering is achieved according to the dry and wet condition, diseased or infected plants are burned and buried, timber pile wires are pulled, the plants are fixed, and monopotassium phosphate is sprayed after defloration so that diseases can be prevented from endangering the plants. The method provides a mature technology for planting the marigolds in the sand of the high and cold region like Inner Mongolia.