A list of the contents of this article:

Control of diseases and insect pests of zinnia

1. Pest control of zinnia: Helicoverpa armigera: larvae drill buds and bite flowers. Control method: ① uses black light to trap and kill adults. ② turned the soil and ploughed in winter to eliminate the pupae of overwintering insects in the soil. ③ was sprayed with 40% methophos EC 1000 times 2000 times, or 50% fenitrothion EC 1000 times, or 20% fenvalerate EC 1000 times 1500 times, or 25% pyrethroid EC 1000 times 2000 times.

2. In the process of prevention and control of diseases and insect pests, it can be pruned, the branches and leaves of the plants can be cut off, and the ventilation between plants can be improved. It can also be sprayed every ten days to kill the bacterial pests on the plants. Insecticidal pills can also be buried in the soil to eliminate the eggs in the soil, so that the plants can grow healthily.

3. Quenching disease: it is easy to occur in seedling stage and seedling stage, and the main causes are lack of light, low temperature and high humidity. When the seedlings occurred, the base of the stem on the surface or below the surface showed waterlogged disease spots, the disease part became brown, continued to expand around the stem, tissue necrosis, seedling lodging. The principle of prevention is: do not sow too early, choose a nursery place with sufficient light and good ventilation, thoroughly disinfect the sowing substrate before raising seedlings, and do not get too wet or dry or wet suddenly.

4. In the early stage of the disease, remove the diseased leaves in time, and then spray immediately to prevent and cure the disease. You can add 0.1% sulfur powder to Bordeaux solution with 1VOV 0.5% 200 times, or 65% zinc wettable powder 500 times, or 75% chlorothalonil wettable powder 500800 times, or 50% dichlorothalonium 800,800 times or 1000 times. Common diseases of zinnia: black spot disease is also called brown spot disease. It happens all over the country.

A complete collection of culture methods and matters needing attention of zinnia

The conservation method of zinnia in spring in the process of breeding in spring, it needs to be maintained in mild sunlight, and it also needs timely watering to keep the soil moist, and N, P and K compound fertilizer is applied every half a month. and need to be topped and trimmed, so that zinnia can grow better.

Four matters needing attention in the cultivation of zinzinnia in the process of growing, it needs to be maintained in the sun, and it needs at least 6 hours of light every day, otherwise it is easy to cause overgrowth. With the help of the sun, it can make its growth better, but it is not suitable to be exposed in the summer sun, so we need to pay attention to shade and sun protection.

Temperature: between 15 and 30 degrees is suitable for zinnia. And because it is a plant that is neither cold-resistant nor high-temperature resistant, it needs to adjust the temperature in summer and winter. In summer, it's best not to be higher than 35 degrees. In winter, try to be around 15 degrees. Watering: zinnia is a kind of drought-tolerant plant, it is afraid of waterlogging. Therefore, usually keep the basin soil not completely dry, do not need to pour too much.

Watering: keep the soil slightly wet and avoid stagnant water. Reduce the amount of water in high temperature in summer to avoid water evaporation too quickly. Sprinkle water on the soil surface at the right time to maintain proper humidity. Especially in autumn, it is necessary to ensure an adequate water supply to help it grow and bloom. Temperature: zinnia is not resistant to high temperature, it should be placed in a well-ventilated environment in summer, and the temperature can be reduced by spraying water. The suitable shady environment is beneficial to its growth.

Zinzagrass Seedling Culture method A good light cultivation of zinnia seedlings should ensure enough sunlight, for example, in peacetime breeding, they can be placed in a brighter light place, so as to promote the healthy and luxuriant growth of young branches and leaves. Summer light is relatively strong, it is necessary to do a good shade measures to prohibit the occurrence of sun exposure.

How to raise a hundred-day grass

Water it. After the zinnia was planted in the basin, it was watered once, and the dry environment of the basin soil was kept. If the zinnia is overwatered, it is easy to grow, affect the root growth and blossom badly. (2) fertilization. During the vigorous growth period, phosphorus and potassium-based fertilizers were applied every 10 days or so to inhibit nitrogen fertilizer, prevent overgrowth and shade, and promote the plants to be strong and bloom. (3) Seedling and heart picking.

Watering: keep the soil slightly wet and avoid stagnant water. Reduce the amount of water in high temperature in summer to avoid water evaporation too quickly. Sprinkle water on the soil surface at the right time to maintain proper humidity. Especially in autumn, it is necessary to ensure an adequate water supply to help it grow and bloom. Temperature: zinnia is not resistant to high temperature, it should be placed in a well-ventilated environment in summer, and the temperature can be reduced by spraying water. The suitable shady environment is beneficial to its growth.

In the process of spring cultivation, zinzinnia needs to be maintained in mild sunlight, and it also needs timely watering to keep the soil moist. Nitrogen, phosphorus and potassium compound fertilizer is applied every half a month, and it needs to be topped and trimmed. This can make the zinnia grow better.

The requirements of soil and temperature zinnia for soil are loose, good air permeability and high fertility. It is recommended to use the mixture of rotten leaf soil, peat and perlite. In addition, it likes a warm and sunny environment, is not resistant to high temperature and cold, and the suitable temperature for growth is between 18 and 20 ℃. Light and moisture hundred-day grass needs enough sunlight for photosynthesis to promote its better growth.

Maintenance method temperature: between 15 and 30 degrees are more suitable for zinnia. And because it is a plant that is neither cold-resistant nor high-temperature resistant, it needs to adjust the temperature in summer and winter. In summer, it's best not to be higher than 35 degrees. In winter, try to be around 15 degrees. Watering: zinnia is a kind of drought-tolerant plant, it is afraid of waterlogging. Therefore, usually keep the basin soil not completely dry, do not need to pour too much.