All gardeners dream of a good crop of tomatoes.But sometimes brown spots and decay reduce to naught all the works.This usually occurs in August - when on the plant appear green fruit.Why blacken tomatoes?Let's look at this issue.
blight and gray mold
fungal spores of Phytophthora enough drops of water for germination, so the risk period (July-August) tomatoes watered at the roots.Leaves and fruits do not have to get wet.If the disease struck the plant, the daily need to remove diseased leaves and fruits, putting them outside the garden plot.This will prevent the spread of late blight.In addition, improved ventilation and lighting crops, which also has a negative effect on the fungus.
If the tomatoes turn black from the bottom, it is gray mold.The disease is spread by deficiency of calcium in the shoots or excessive soil acidity.Another version of the appearance of botrytis - the wrong dosage of fertilizers for feeding.
for disease prevention should be aware of such a thing as crop rotation.It implies that you can not plant tomatoes next to the potatoes and the area where grown peppers or potatoes.They can also be left in its place: in the garden of the former, they should appear in 4 years.
Why blacken tomatoes and how to prevent this process?This is the main question gardeners.Please be aware that for planting tomatoes is necessary to choose sites with good lighting, ventilated on all sides.Rare planting scheme also will protect the plant from the spread of disease, because bright sunlight is harmful for the fungi.
absolute protection of plants against diseases not present, because the man does not control the weather, and late blight spores develop in a moist environment.Why blacken green tomatoes?This is a manifestation of the above diseases.For its prevention should be excluded abundant watering.If the portion is small, the tomatoes to be watered with warm water, which was pre-heated in the sun.When dressing is necessary to consider the fertilizer.
Conduct technical measures
Why blacken tomatoes, if the correct section, and the conditions are met?The fact that the disease develops, where warm, humid and windless.For the destruction of a favorable environment for the fungus is necessary to pinch the plant and tie the stems to stakes or a trellis.
From the ground to the lower leaves should be about 30 cm - it will provide the necessary aeration of the soil.Pasynkovanie topping and accelerate the growth and maturation of the fruit, so the crop can be collected prior to the development of late blight.Gardeners also sprayed bushes salted warm water, and at the first sign of infection - one percent Bordeaux fluid.
Here we answer the question of why blacken tomatoes.The main thing - remember that the fungus loves warm, moisture.Therefore, you should promptly carry out all preventive and farming practices, and comply with the conditions of cultivation of tomatoes.