Q.calibrachoa leaves dying
Calibrachoa leaves drying up. Appears to have a very fine mesh type web on leaves. Rust colored flowers are becoming mottled.

Downtoearthdigs
Answered on July 9, 2015
It is likely spider mites, which can be treated with neem oil. Here is more information: https://www.gardeningknowhow.com/problems/pests/neem-oil-uses.htm
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