Key points of cultivation techniques and Control of Diseases and insect pests of Wo Citrus in Guangxi

Key points of cultivation techniques and Control of Diseases and insect pests of Wo Citrus in Guangxi

1 the key points of cultivation techniques of the new variety Wo Citrus

1.1 selection of saplings

When planting mandarin in Quanzhou county of Guangxi, it is necessary to choose grafted seedlings with symmetrical plant type and relatively complete root system, but not for some seedlings suffering from anthracnose and canker. In addition, for the whole state area, red tangerine is selected as the grafting rootstock in alkaline geology, while under the geological conditions of paddy field, it is best to choose Fructus Aurantii as the grafted rootstock, so as to ensure the high quality grafted seedlings of fertile mandarin.

1.2 Orchard soil management

It is best to plant orchards in areas where the soil is loose and fertile, and be sure to have a good leeward. For areas with a small slope, deep ploughing and loosening must be carried out when the soil is still moist, the degree of deep ploughing should be kept at 60~70cm, vertical ploughing should be adopted when deep ploughing, and necessary filling work should be carried out after the tillage is completed. Then, based on the actual situation of the soil, the drainage ditch with a depth of about 60cm was excavated. In order to promote the healthy development of farmland, other cash crops can also be planted among saplings in spring and autumn. However, in Quanzhou County, Guangxi, there are some areas where the soil quality is relatively poor. In order to grow fertile mandarin in this area, the best soil management method is to dig a large pit in this area and fill it with some organic fertilizer to make it fully integrated with the soil. Finally, the fused soil will be backfilled.

1.3 Regulation of fertilizer and water

The new variety of mandarin has indomitable vitality, so the cultivation and management is relatively simple. Under the condition of sufficient light, mandarin can grow well, but special attention should be paid to the application of various fertilizers. A good grasp of the proportion of nitrogen, phosphorus and potassium in fertilizer is more beneficial to the flowering and fruiting of mandarin. When base fertilizer needs to be applied in the planting process, fermented fertilizer and water can be used instead.

1.4 colonization technique

Spacing is an important cultivation technique in the cultivation of Wo mandarin in Quanzhou County, Guangxi. The vertical distance between each fertile mandarin should be kept in the range of 2m, and the horizontal distance should be kept at 3m. The temperature in Quanzhou county has initially rebounded in May in February, and it is most suitable for planting if there is overcast and rainy weather during this period. If you encounter an emergency, you can also choose September Mak in November.

1.5 Young tree management

The application of enhanced fertilizer is an indispensable important link in the growth process of young mandarin trees. therefore, in order to better promote the growth of young trees, water and fertilizer spraying equipment can be installed in the planting area, which mainly includes switch, reservoir, filter and so on. In order to promote young trees to grow canopy as soon as possible, in addition to regularly spraying water and fertilizer, it is especially important to ensure the same proportion of nitrogen, phosphorus and potassium, and to ensure that each young tree can absorb about 15kg of organic fertilizer and 2kg compound fertilizer every year. Under the effect of good water and fertilizer, fertile mandarin can grow new buds 6 or 7 times a year, so fruit growers must prune them regularly. The requirement for pruning should be based on the principle of "one fork and three branches". To put it simply, it is to trim off the thinner branches and control the pruning degree of the longer branches to 20~25cm. Only by meeting this series of standards can the young trees of mandarin grow better.

2 Prevention and control of diseases and insect pests of fertile mandarin

2.1 peptic ulcer

For mandarin varieties, the main disease affecting its yield and quality is canker, which will not only cause ugly spots in leaves and fruits, but also cause fruit loss in serious cases. The disease is also highly contagious. If a tree in the whole orchard suffers from the disease, it is very likely to cause damage to the whole orchard through the spread of wind, rain and various insects. Therefore, in order to prevent the threat of the disease, we must first choose disease-free seedlings, in addition, they must be pruned regularly, and once diseased branches are found, they must be trimmed and incinerated immediately.

2.2 anthracnose

The month in which anthracnose occurs in Wo mandarin varieties is usually concentrated on the branches with weak growth trend in May or August. If they are not treated in time, the branches will wither and yield will be greatly reduced in serious cases. To prevent the disease, fruit growers can spray 45% prochloraz on the surface of the fruit or on branches combined with 600-1000-fold mancozeb, plus 3000-5000-fold 25% fenoconazole spray.

2.3 leaf miner

The disease of mandarin leaf miner mostly occurs from late April to mid-May. July and August belong to the prevailing stage of the disease, and the seedlings will be threatened when it is serious. Therefore, once the disease occurs, the seedlings must be concentrated. If fruit growers want to better control the disease, they can also choose 25% double aqueous agent or 1500 times of imidacloprid. If the disease is more serious, they can also spray a variety of agents mixed.