Thirps
The insects, also known as bladder feet, feed on the plant sap. The infestation is recognizable by whitish to silvery shimmering suckers. On closer inspection, tiny, crusty, black droppings can be found. In the event of severe or permanent infestation, the leaves and flowers cripple and dry out as a result.
also read
- Are gladioli hardy?
- Dig up gladioli for wintering
- The best time to plant gladioli
Combat
Thrips do not like moisture. Take a shower Gladiolus therefore regularly and thoroughly. It can also be helpful to set up blue glue boards (blue boards).
Wait with me the excavation Do not remove the onions until the leaves are completely absorbed in autumn, but take the onions out when the leaves at the bottom are still green. The thrips are located in this area of the plants and can be cut off with the leaves. Destroy the leaves in the household garbage, as the bubble feet can survive in the warm compost heap.
You can recognize thirps in the onions by the brown spots and the shrinking of the tubers. Destroy these bulbs immediately to prevent the pests from spreading. Do not store the tubers too warm as the insect pests are very sensitive to cold. Temperatures of around five degrees are ideal.
Wet rot or dry rot
These diseases are in most cases the result of an unsuitable one Location. If the surface is too dry, the gladiolus turns yellow from the top and dies. If it is too moist, wet rot forms at the base of the leaves and the rotten stalk tips over.
Combat
Destroy diseased plants together with the onion during the growing season. Gladioli must not be placed in the same place for several years. Therefore, look for a more suitable place for the garden beauties.
Lacquer scab (basal rot)
At the base of the leaves there are initially many small, red-brown and raised pustules or black-brown stripes. The leaves become rotten and soft and eventually fold over. Lacquer scab also affects the bulbs, which show sunken brown spots with a slightly raised edge and a lacquer-like coating. The small nodules are also attacked by the basal rot.
Combat
Here, too, it only helps to destroy the plants immediately and not to plant any more gladioli in the same location for the next few years. Chemical means to combat the plant disease are currently not available.
Tips
Drive the Gladiolus bulbs If the onions only look badly in winter storage or if they shrivel up to form hard mummies, the gladioli could be infected with onion rot. To prevent the spread of this disease, you should store the bulbs properly during the winter and check them regularly. Throw away infected tubers immediately.
