Growers of Poinsettia flower production should note that the following measures should be taken in August each year to avoid losses.
There are many kinds of unfavorable conditions in the process of planting poinsettia, but producers should pay attention to the fact that when the cuttings in the container take root, necrosis of the neonatal roots may occur, which in turn will affect the normality of plants from September to October. Grow.
This article will focus on the growth of the roots of Poinsettia plants in August to help growers grow poinsettia through asexual reproduction with high uniformity and growth.
Poinsettia should be planted with healthy roots. Unhealthy root plants will directly affect the effect of transplanting plug seedlings. The causes of root damage are various and complex, and they can be summed up in three ways: the spread of insect fungus, pythium and watering conditions.
Management of Insect Fungal Transmission
The prevention and treatment of insect fungi should pay attention from the stage of cutting seedlings. The plantation field must be clean and the insects are within the controllable range to meet the smooth arrival of the first batch of cutting seedlings. Insects brought in with cuttings are difficult to remove and control before reproduction begins, and the greenhouse environment is very suitable for the survival of insect fungi.
Once the cuttings are planted, the pest control work will need to be carried out on time. Spraying with Citation and Safari insecticides will be effective in controlling nematode diseases in plants. Safari insecticides can only be used to kill insects on a single plant and are more restricted. As the problem of toxic residues in phytochemicals is getting more and more attention today, the residual problem of single plants after using Safari insecticide can not be ignored.
The use of seedbed production methods is desirable, spraying pesticides or lime disinfection under the seedbed, the effect is quite good.
Pythium control
The control of Pythium should be carried out at the same time as the transplanting process. The most widely used is the Chuban or Chlorazole chemical preparation. Fenstop is also a new type of preparation. Although the product is currently inaccurate, it can still be used as an alternative to fungicides and is used when mold is stubborn. The survey found that some growers using biological control methods such as surface coating are also significant.
The production of Pythium is inextricably linked with the management of water. According to observations, severe water shortage is an important factor directly leading to plant root damage, resulting in a large number of mold, attacking the root system of plants, so the management of water resources has become our focus.
Water Resources Management
It was observed that roots grow slowly in the matrix within the first 10 days after transplanting, and once the root system extends beyond the matrix material, the root system will be severely damaged and stop growing. At this time, most people think that Pythium or insect fungi are deadly killers, but we have observed that the proper management of plant water resources is the key factor.
We have transplanted the cuttings of seedlings into the mud and peat matrix and compared the experiments to observe the growth of the roots of the plants. It was found that the appropriate healthy cuttings that were watered were 48 hours after transplanting and were longer than the roots of other conventional substrates. About 1 cm.
In the experiment, we also noticed that if rooting cuttings are improperly watered before and after transplanting, they will cause a great degree of damage to the roots of the plants. Therefore, special attention should be paid to the situation of water used for cuttings before transplanting. In the subsequent moisturizing stage, watering and substrate irrigation with root cuttings are more concerned because the leaves of plants will emit moisture that is absorbed from the matrix. In the hot July, someone needs to be responsible for watering every day to ensure that the roots of the poinsettia plant thrive.
Cutting seedlings will cause root damage after transplanting for a long time. Therefore, it is important to pay attention to the proper moisture of the transplanting seedlings during transplanting. After the plug seedlings are transplanted into the greenhouse, they can be watered once more to meet their growth in the plug. The moisture in the process.
In addition, pay attention to the problem of moisture on the surface of the substrate. For example, use a flower plug to cover the surface to prevent loss of moisture from the flower sludge. If the amount of water is adequate, the root system of the plant will extend into the surrounding growth matrix material to prevent the root from exposing the flower mud.
Disposable Gloves,Pvc Disposable Gloves,Disposable Examination Safety Gloves,Protective Isolation Gloves
Shaoxing Weijian Medical Supplies Co.,Ltd. , https://www.wetourmedical.com