Content
- Correctly interpret and cure yellow leaves on tomatoes
- These diseases produce yellow leaves on tomatoes
- These pests suck the life out of the leaves
- The riddle's solution for yellow leaves: nutrient deficiency
- Tips & Tricks
Correctly interpret and cure yellow leaves on tomatoes
Yellow leaves on tomatoes are evidence of growth problems that should not be underestimated. We discover the most common causes and show you which countermeasures you are right.
These diseases produce yellow leaves on tomatoes
Mushrooms and bacteria of various origins are primarily suspicious of yellow leaves on tomatoes. The following infectious diseases come into question and should be treated immediately:
Leaf spot disease (Septoria lycopersici)
On the yellowed leaves, watery patches develop with a black border. In the course of the leaves wither and fall off. The fruits themselves are spared. Since they are no longer sufficiently supplied, the harvest is very low.
Bacterial wilt (Corynebacterium michiganense)
The foliage turns yellow from below. Sliced stems show brown-yellow vessels. After flowering, most of the leaves fall off. Unappetizing patches develop on the fruits.
These pests suck the life out of the leaves
Among the usual suspects as the cause of yellow leaves on tomatoes, the two following pests particularly distinguished themselves:
White fly - (Trialeurodes vaporariorum)
The tiny, white flies and their brood mercilessly suck the sap from the leaves. The foliage turns yellow, covered with sticky honeydew, withers and falls off.
Thrips - (Thysanoptera)
The black fringed wingers call out yellow leaves in two ways. The adult insects suck on the sap while the larvae nibble on the roots.
The riddle's solution for yellow leaves: nutrient deficiency
If diseases and pests can be excluded as the cause of yellow leaves, the experienced hobby gardener is far from finished with his Latin. It is targeting a lack of nutrient supply. If the following minerals are absent, the acrid tomato plant reacts with a yellowing of its foliage:
Tips & Tricks
An in-depth knowledge of the exact composition of the soil in the tomato bed is provided by the professional soil analysis. Qualified laboratories have specialized in this and offer this service at a low price. With the help of instructions, soil samples are taken and sent by post. The lab not only provides a revealing result, but also gives practical suggestions for fertilization.