1. Infection with powdery mildewReason: White marks appear on the leaves of Anthurium. In addition to being accidentally contaminated later, there is a high possibility that it is infected with powdery mildew. White circular spots will grow on the surface of the leaves, especially on the lower part. The leaves on the upper part are less infected, and the infection on the back is more severe than on the front. If you look closely, you will see mycelium on the leaves. Measures: Pay attention to ventilation at ordinary times, which can play a preventive role. If the disease occurs, remove the infected leaves in time and then spray the treatment with pesticides. 2. Infection with aphidsCause: The white calla lily may also be infected by aphids, which will gather on a certain part of the leaves and absorb the juice, causing white spots to appear on the part that has been sucked. Measures: When aphids are found, scrape them down with a brush first. If the situation is serious, you can spray medicine for treatment. 3. Lack of water and fertilizerReason: It needs a certain amount of water and fertilizer to support its growth. If there is a lack of water and fertilizer, its growth will be affected and the leaves will turn white. Measures: Add water and nutrients in time according to growth needs, but be careful not to add too much each time. |
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