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Pest and Disease Control Methods and Technical Key Points for Verbena tenuisecta

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Verbena tenuisecta is a flower very much loved by gardening friends. Today I want to introduce to everyone how to handle it when it gets sick. First, you need to identify what disease it has. If it is leaf spot disease, cut off the diseased leaves, spray with medication, and increase the application of P and K fertilizers; if it is gray mold, cut off the diseased flowers together with their leaves and destroy them, then spray with medication; if it is black-legged thrips, you can directly spray with medication to kill them.

1. Powdery mildew

This disease mainly harms the leaves of the flower, and sometimes the stems and petioles are also affected. In the early stages of the disease, white spots appear on the leaf surface, and its ability to spread is very strong, able to connect all the spots into one patch in a very short time. If left untreated for a long time, the leaves will gradually turn yellow and wither. This disease is very prone to occurring when air circulation is poor, the environment is too humid, and the temperature is too high.

Control: After it occurs, you can first prune off the severely affected branches and leaves, and at the same time spray with medication, and increase the application of phosphorus and potassium fertilizers; after winter begins, you can cut off all the affected branches and leaves, and clean them up thoroughly. During daily care, be sure to choose a location with good air circulation for placement, and in summer you can use a fan to increase ventilation for it.

2. Gray mold

This disease mainly occurs at the flowers. In the early stage, small spots appear on the flowers, then slowly spread, causing the entire flower to discolor and rot; the leaves are also affected, in the same condition as the flowers. This disease is likewise prone to occurring in an overly humid environment, and this disease can lie dormant in winter and occur again the following year.

Control: In the early stage of the disease, cut off the affected flowers and leaves and destroy them, then use medication to control it and reduce the humidity of the surroundings; when watering daily, try to do it in the morning.

3. Black-legged thrips

This pest mainly survives by sucking the flower sap of the plant, causing the flowers to drop prematurely.

Control: Spray with medication to kill them

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