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NL FR CONTACT HOME Home Info Products Quality Information BDBnet BDB box Search Conditions of sale Nose rot on the vegetables in the greenhouse Brown, sunken spots on the top (the nose) of tomatoes, peppers or zucchini, who has not yet experienced this phenomenon? These symptoms indicate nose rot, and even the professional vegetable grower faces this problem on a regular basis. Nose rot is not caused by fungi, bacteria or viruses. The real cause is a lack of calcium in the fruit, which causes the cell walls to lose their firmness. What can you pay attention to to prevent nose rot in the greenhouse? On the one hand, an absolute lack of calcium in the soil can be a cause. If the roots absorb little calcium, a calcium deficiency will occur. However, in most cases scattering lime is not a solution! In the soil, the ratio of different mineral nutritional elements plays a major role. If this ratio is disturbed, the absorbability of the nutrients is compromised. For example, the calcium / magnesium ratio may not exceed 50. An excessively high salt concentration in the greenhouse can for the same reason be the cause of a calcium deficiency. On the other hand, it has been very hot in recent weeks. In warm weather, the plant roots absorb a lot of moisture. When the soil is not sufficiently moist, the plant will draw water from the fruit. The cells that make up the fruit can be damaged as a result. If the cell wall contains too little calcium, it will become weak and cells will leak, resulting in a brownish-black color on the nose. In warm weather it is recommended to ventilate the greenhouse and not to water too much at a time, as otherwise the root activity will be slowed down. The cause of nose rot is complex and requires some knowledge of the plant's needs and the importance of all the nutrients in the soil. To prevent nose rot, it makes sense to take a soil sample from the greenhouse for a standard soil decomposition with additional salt concentration. In this way the liming, the nutritional elements and the salt concentration can be steered in the right direction. The garden box of the Soil Science Service of Belgium includes a booklet with information about various nutritional elements and how you can take a soil sample yourself. You put this soil sample in a sampling bag, which you then send to the Soil Science Service. We analyze the sample in our laboratory and give you specific liming and fertilization advice for the next 3 years. without brown spots! Click here for an order garden box or for questions about this . Copyright 2009 BDB Sitemap Webmaster Visitors today: 9865 Number of visitors currently online: 47