The Mildew lettuce is a type of disorder that occurs in the plant due to the action of a pseudohongo. This can affect both greenhouses, as in the outdoors.
Do you want to learn how to identify and treat powdery Mildew in Lettuce? Keep reading.
Mildew symptoms Lettuce
The first to be identified is a characteristic white powder, although it is true that it is not too easy to see. At first seems an alien powder to the plant, although a more comprehensive analysis discovers that adheres to the leaves. It will cover both sides of the cotyledons and the first leaves.
If the plant does not receive treatment, the infection will spread and may die.
If the plant affected adults, as usual, it is that the infection starts with the older leaves.
If infection occurs in a greenhouse, the colonization of tissues, and the expansion thereof, it will be slower.
This white powder evolves to become chlorotic spots developed within the leaves, to invade the upper face thereof.
If the crop is cut open, the process will be much faster. It will be challenging to identify this dust; all that will see stains dead tissue.
Time and conditions
The most common time when you can present the Mildiu lettuce is in spring, although it will not be strange to display it in the early summer months. Remember that Mildew affects other species, like the zucchini, though differently.
Usually a disease typical wet weather, but with little rain and cold.
The temperature should be between 5 and 20; i.e., a type of fungus that adapts to virtually any cold. However, the fungus can not take too well direct light from sunlight, which can contribute to the destruction.
As for the spread of the disease, you should know that it will be speedy. Once a plant is infected, the Mildew lettuce produces new generations of Zoosporangia (i.e., spores that are responsible for spreading the disease) within approximately 5-7 days.
How to control downy mildew lettuce?
Control downy mildew lettuce is very complicated; at the time when the disease has manifested itself intensely will not be much to do.
The best way to protect the crop is to use vegetables that are resistant to the fungus from the outset but are not plentiful and easy to get.
That is why, so we will have no other to control the atmosphere. It will be crucial that it remains wet in the morning, so you have to ventilate the greenhouse as soon as possible upon waking day. The risk should not be abundant; recalls that the Mildiu lettuce can generate in wet conditions, so will water only when the soil is dry.
If a live plant is detected but infected with the bacteria, the best thing to do is to plow quickly to prevent can be extended. It should proceed with pruning the affected leaves, stems, even with the full withdrawal of the plant if you can no longer do anything with it.
Fungicides can be used to treat Mildew lettuce, although they should start using the seedbed, and only should always be followed when handling. Environmental conditions are conducive for the disease to develop.