1. Phytophthora infested the roots and necks first, and the leaves of the affected plants turned yellow and then turned gray-brown until dead, and the rhizomes turned black and rotted.
Control methods: 1 selection of healthy disease-free plant cultivation. 2 The pathogen is mainly transmitted by soil, so the nursery must be carefully disinfected before colonization. Pharmaceutic agent can be used for adding chlorhexidine and pentachloronitrobenzene (3:1), dosage of 4～6g/m2, disinfecting spraying agent on soil surface, mixing with topsoil, sealing with plastic film, and sealing the greenhouse at the same time After 30 hours of fumigation, the covers were removed, ventilation was allowed, and the topsoil was re-blended. Planting was completed 15 days later. Vapors can also be released into the soil by pipes. This method has a large investment cost, but it is effective. 3 The colonization requires that the root and neck be exposed to the surface of the earth about 1.5 centimeters, with a slight degree of lodging. Due to its characteristic of contracting roots, the root neck of the plant will be deeply buried in the soil, making it easier to infect the bacteria. In order to facilitate the growth and development of the seedlings, a method of cultivation using a topical substrate may be adopted. That is, a round planting hole with a diameter of about 15 cm is first excavated at the site of the site of the planting, and then the sun-disinfected river sand or perlite + vermiculite is used (1 The matrix of 1:1) is filled up, seedlings are then planted on the substrate, the water is poured into the roots, the roots are compacted, and then the normal daily management is performed, so that an immediate effect can be obtained. 4 When a diseased plant is found, it can be treated with capricin 0.1 g/liter + 1% copper sulfate in the initial stage. In the later stage of disease, the diseased plant should be immediately pulled out and burned, and the above-mentioned agents should be used to treat the surrounding plants and soil.
2. There is a distinct yellow-green spot on the virus disease leaf, and the new leaf is narrowed. Speckle is not noticeable at high temperatures. The growth is weak, the number of cut flowers drops sharply and continues to develop. The diseased plants will die.
Control methods: 1 remove the diseased plants. 2 Complete elimination of vector locusts that transmit the virus. 3 In the poorly ventilated greenhouse cultivation, scale insects often occur and should be removed in time.
3. Whitefly used imidacloprid, dichlorvos, phoxim, methamidophos have better control effect. However, if a single type of drug is liable to produce drug resistance, it is preferable to use a mixed agent or multiple agents in turn, avoiding repeated use of the same agent. For the production of drug-resistant organophosphorus pesticides and Wan Ling water plus pyrethroid pesticides mixed use.
4. The leaf miner flies from April to May and from October to November is the peak period of the damage. It can be killed by the combination of schizophylline, edwardin, abamidine or insecticide.
Oat rice can help reduce the cholesterol content in the human body and help prevent atherosclerosis. Oat rice is a kind of food with high nutrition and low sugar. It mainly contains a variety of amino acids and vitamin E needed by the human body. Most people can eat it, but the amount should be controlled to avoid excessive intake. In order to ensure good health, it is necessary to maintain a balanced nutrition and increase some exercise, such as running or gymnastics.
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