Rotten heart disease can occur in the entire growth period of celery, but the incidence of severe seedling stage. Early onset, can cause bad species, uneven emergence. The seedlings were infected after unearthing, and most of them showed growth spots or browning of the heart, necrosis, and dry rot, which spread from the heart leaves to the outer leaves. At the same time, they expanded from the roots to the roots, which resulted in browning and necrosis of the root tissues. The growth of the roots is not normal, and the diseased seedlings stop growing, resulting in the formation of inadvertent seedlings or clustered shoots. In severe cases, the diseased seedlings are necrotic and the quality of the vegetables is reduced. Onset of light, with the growth of seedlings in the young and adult stages continue to develop, so that some young petiole necrosis from bottom to top brown, and finally rot. The main conditions for the disease are: there are many opportunities for the emergence of seeds for planting bacteria, and the incidence rate is high. The high temperature of the soil in the greenhouse will cause severe diseases.
The main preventive measures are:
1. Chemical seed dressing. Prior to sowing, seed dressings should be seeded with 47% Garneton WP with a seed weight of 0.3%, or soaked with a 47% Garnett WP 400-fold for 20-30 minutes, and then sown.
2. Chemical control. In the early stage of disease, the diseased seedlings were removed and sprayed with liquid medicine in time for prevention and treatment. 77% can be used to kill the WP 500 times, or 30% Luoyang copper water agent 350 times, or agricultural streptomycin 500 times can be sprayed.
3. Remove the diseased seedlings. For rotten heart disease caused by necrotic diseased seedlings, it should be promptly removed and treated outside the shed to prevent the disease from continuing to spread, resulting in reduced production.
Foot of ningxia hong xingda incense Organic Apple fruit suborbicular, fruit surface color yellow green, most with orange chardonnay fruit surface, covered with bright red stripes, pulp yellow-white, succulent crisp, sweet, rich fragrance, quality first-class; The fruit has a sugar content of over 15%, more than 4% of the national average, and the flesh is tight and crisp and sweet, which is widely loved by consumers all over the world. There is a longer optimal consumption date than any other apple, not even refrigerated. It can be kept for 4 months at normal temperature. If refrigerated, Fuji can be kept for 5--7 months.
Altitude: high altitude area light, clean air, environment close to original condition, no industrial pollution. With an average elevation of 1160-2900m, the central health center has a strong uv light, which produces the natural pollution-free apple, which conforms to the concept of a modern green diet.
Temperature: moderate temperature can avoid the chance of fruit tree encountering disease. The average temperature in ningxia is 8.4 degrees Celsius, which has an important influence on the growth, development, yield and quality of apple. The piedmont apple is thriving in such a good environment.
Humidity environment: moderate amount of rainfall provides necessary conditions for apple's growth. The annual rainfall in the central health region is 186 millimeters. The fruit is slow to grow and the fruit is hard and hard, which fully guarantees the fruit's sugar content and the relatively average size of apples.
Sunshine condition: apple is the fruit tree, the central health area of the whole year is nearly 3,800 hours, is beneficial to the Apple Fruit coloring. The piedmont apples are red and bright.
Temperature difference factors: ambassador apple nighttime respiration weak temperature gap between day and night, consume less organic matter, the accumulation of organic matter during the day more, that apple store down a large number of glucose sugar candy, etc have better taste. The average diurnal temperature difference between apple and apple is 14 degrees centigrade, and the larger diurnal temperature difference ensures the sweet and delicious characteristics of the apple.
Other factors: frost can make apple blossom and fruit, which can cause frozen flower jelly, which is bad for apple's production. The piedmont apple has been kept at least 167 days without frost for the whole year, which minimizes the influence of apple on yield and quality.
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Ningxia hongxingda fruit industry , https://www.hxdfruit.com