There are also many pests and pests in the cabbage-growing environment, and it is only by preventing them that the cabbage can be healthy。
I. Pest management
Cabbage is infested with pests, many of which have yet to be dealt with thoroughly. For example, cabbage viruses and decomposition, while some can be mitigated by crop management, pest control and so on, there is still some difficulty in removing them completely. Each year, therefore, the disease occurs in different regions. Light years, which affect a certain amount of production, are not even good years. Chastic cabbage, while there are medicines available to combat it, is often a serious loss due to the lack of timely response。
Therefore, a rational approach to the three diseases must be adopted. With regard to pests, in recent years, aphids have been treated more severely as late or inappropriately, and are prone to significant losses. In the case of fort west of the river river, 150 acres of white vermin have been destroyed by aphids. In other regions, there is also a high incidence of aphids due to post-prevalence or poor treatment; although the impact was modest, the quality of cabbage declined. Such pests must be strictly combated, and their early occurrence is not only a problem of bellow bites, but often aphids cause morbid and viral diseases, and so is combating aphids。
Ii. Diseases
During the time of occurrence, it can occur from seedlings to harvests. Over-water, humid air, premature sowing periods, prone to soft decay and more frequent in low-lying areas. In terms of growth, earlier periods were less frequent and later. It's hard to tell from the beginning that it looks like a very good cabbage from the outside, but the roots and leaves are rotting, slowly growing to the back of the leaves all or nothing. This is more widespread from within, mainly from the root, or from the folate-based disease。
The examination should take place at noon, if the leaves are found to be atrophy, the strain may have been infected with the disease; others have first rotted from the leaf handle, slowly extended to the whole plant, initially in the lower part of the leaf handle, as if it had been burned with hot water, gradually turned brown, eventually into porridges and stenched; others have begun at the top, opening several layers of the outer leaf, beginning with the heart of the vegetable, beginning with decay, beginning with one layer of infection, leaching inside and outside, beginning with or on the side of the leaf, spreading the whole cabbage。
Methods of combating the disease: there is still no thorough approach to combating the disease, and it needs to be addressed in an integrated manner in terms of varieties, planting techniques and medicinal agents in order to mitigate the disease。
1. Selection of disease-resistant varieties: some have been very resistant to the disease, such as lia ninghing city, heunghing city, zhui zhui, beijing, tianjin qing pongya, zhang qinghua, and okeda, among others. Where the disease is more severe, appropriate seeding is possible。
2. Seeding at an appropriate later stage: early sowing of the disease is serious and excessive seeding, although light, often affects yields and must be properly managed and at a later stage than originally。
3. Timely pest control: underground pests, such as tigers, vermin, etc., bite the root and the fungus enter the vegetables from the mouth, so that, before or when seeding occurs, a number of baits are distributed to clean the ground pests. Attention must also be paid to the fact that ground pests, such as aphids, are also vectors of transmission and are completely lost。
4. Emancipation of the disease: the discovery of already ill vegetable strains is generally not easy to return to normal, and only increased transmission opportunities must be removed in time for greater losses to be elected. It is not to be thrown anywhere, and it is collected and buried in a pit far from the vegetable field. It also needs to be buried in the ground. More attention should be paid to examining strains before detour, which tend to spread around the water, and to increasing the risk of transmission before water is drained。
5. Don ' t hurt the root of the leaves: farming, fertilization, watering, etc. In the fields often do not touch the handle with enough care, and if the wounds are not healing in the middle of the day, or in the wet weather, this increases the chances of infection. Therefore, during the operation, care must be taken not to touch a leaf。
6. High-strength cultivation: high-precipitation, better ventilation, and a kitchen can also reduce the chance of water impregnation, with wounds, faster healing and less infection。
7. Observe the application of fertilizers: in some areas, the rotten leaves of cabbage or yellow, cabbage leaves are often used as material for leaking fat, and when growing cabbage, they are put on the ground because of a lack of decomposition of warmness, and a large number of bacteria are brought to the ground and passed on to the food. There are also those who pursue human urine without decomposition and are prone to increased disease。
8. Attention is drawn to the fact that the fields where cabbage is grown, the places where reward is collected, the areas where cabbage is grown, the residues of sick leaves and leaves are not properly treated, the areas where cabbage is grown in the coming year and the bacteria are transmitted to glory. It is therefore advisable that the first year where cabbage, cabbage and yellow land are grown, so as to reduce the incidence of scavenging. In the area of pharmaceutical control, some more effective medicines have been initially found in various parts of the world in recent years, although they have yet to be further explored in terms of their concentration, length of use and methods of use。
Iii. Solutions
1 sulphide linen: a heavy crystallizer, which has had a good effect on the management of cabbage mosaics, based on experiments conducted by the institute of agricultural sciences of the ishikokoshi district and the bounty institute of hebei province. Usage method: spraying the substance in the root of the earth before the occurrence of the coil of cabbage, or spreading the powder in the disease after the onset of the disease。
2. Even cosmopolitan: dilution of cocin to four times the order of 10,000, dilution of 4 times the amount of cocin to four times the amount of 100,000, and a certain effect of the two solutions being combined and sprayed in the disease。
3. Virus disease: the disease, also known as orphan, chicken crowns, crooked mouths and the fall of china, is also not dealt with thoroughly. The disease is usually most prevalent before the ball, with fewer cases occurring in the later stages of growth, with particularly dry climates and less timely water irrigation, and even more so during the early stages of the disease, with leaves not stretching out, wrinkles and long periods of long-term macabre virus disease; some of them are of particularly deep or shallow colours; others are of very different colours on a leaf; and some of the leaves are crooked on one side and curls on the other. It's hard to get white with this disease, and it's hard to pack. If the environment is bad, it'll die in a mess。
Prevention and treatment: avoiding drought, if small seedlings come up in a particularly hot weather and the climate is too high, the water must be kept up and the soil moist. In the case of micro-diseases, greater attention should be paid to adequate moisture, while increasing fertility and rapid growth. Combating pests: cabbage pests such as aphids and dust。
