Controlling greenhouse diseases
Gardening in a greenhouse can be fun but if a disease hits, it can be worrying. How do you fix the problem without destroying the balance you are so carefully trying to maintain, and how do you determine what the root cause of the problrem is?.
Apart from the diseases specific to the plants you are growing in your greenhouse, there are six main diseases that are general.
Greenhouse supply companies, nurseries, and garden centers will always give advice about specific problems you may be having
Damping Off In The Greenhouse
Damping Off is the most likely problem to be faced by the new greenhouse gardener. It is a fungal disease affecting seedlings and shows as a blackened area at the base of the stem. However, you may never see this effect. Affected plant just topple over and die. The first thing you know about it is when your young healthy seedlings just keel over and die. The plants are already dead, so there can be no cure. Prevention, however, is possible. Sometimes the disease is carried in the soil and you should steralize the soil by heating to kill it. Always steralize pots and trays before use. Raising the temperature in the greenhouse can help, as can sowing more thinly, and watering less.If the disease seems to be spreading, try watering with copper fungicide.
Botrytis In The Greenhouse
Grey Mould is the more common name for this disease. Symptoms for this common Fungal disease are a grey-brown or dirty white mould on stems and leaves. You may have already met this disease since it also afects plants grown in the garden.Botrytis grows in low temperatures and poor ventilation. Affected parts should be removed, since they will not recocer.Infected parts should be burned and never put on the compost. You should the improve the greenhouse ventilation, and turn up the heat.
Mildew In The Greenhouse
Mildew is a white powdery coating on leaves which causes them to pucker and become distorted. Affected leaves will not recover, so remove them as son as you see affected leaves and burn them. Leaving them on or around the plant will encourage the disease to spread. Mildew is more common in very dry conditions, So keeping your plants well watered will help control it. Adding dispersible sulpfer or copper fungicide when watering will help to contain any widespread mildew infection.
Blight In The Greenhouse
Blight is shown as brown marks on fruit and leaves. These marks can spread and later turn black. Immediately remove and burn all parts of plants that exhibit symptoms. Spray with copper fungicide if infection persists.
Leaf Mould In The Greenhouse
Leaf Mould causes yellow spots and a brown mould to appear on the leaves. Poor ventilation is the most likely caise. Improve ventilation by adjusting vents, and give your plants much more space.
Virus Diseases In The Greenhouse
Virus Disease afects many plants including tomatoes and cucumbers. They exhibit a number of symptoms including a “fern-like” appearance, or yellow mottling of the leaves. The leaves may also wilt badly, then appear to recover in the morning only to wilt again the next day. Loss of vigour and poor cropping will occur.
There is no cure! Affected plants should be removed and burned. If virus attacks tomatoes, grow them in grow bags the next year. You need to be extra vigilant about hygene, since virus diseases are spred by insects, garden tools and also by hand.
Diseases in the Greenhouse may seem daunting, and most of us will sufer from them from time to time. But, If you regularly check over your plants,keeping an eye out for symptoms, you should be able to take early action to stop a widespread infection. Good housekeeping, together with the right watering and ventilation routine will prevent most problems. So just deal with problems as they occur, Enjoy your greenhouse gardening, and don’t be over concerned.
Fruittek Greenhouse Cooling and Humidity Control System.wmv
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