How to Identify Herbicide Damage in Flowers? A Detailed Guide to Symptom Diagnosis

In flower cultivation, if pesticides are used in excessive amounts, they will cause herbicide damage to flowers. Correctly identifying herbicide damage is of great significance to flower production. The main symptoms of herbicide damage are:

(1) Spots When the spraying concentration is too high, the herbicide damage mainly occurs on the surface of leaves, stems or fruits. Common ones include brown spots, yellow spots, net-like spots, etc. The distribution of the spots is irregular; some areas are mildly affected, while others are severely affected.

(2) Deformity Deformities caused by herbicide damage can occur in the stems, leaves and roots of flowers, and often include leaf curling, clustering, swollen roots, deformed fruits, etc. When soil is fumigated with chemical agents, the damage from the agent often causes root deformities; in some cases the root crown swells into an olive shape, with no lateral roots or mycorrhizae; sometimes truncated seedlings form, with no main root, underdeveloped lateral roots, and a chicken-claw shape.

(3) Withering Withering caused by herbicide damage often shows symptoms in the entire plant, and is mostly caused by herbicides. Withering caused by herbicide damage has no center of incidence, and its progression is slow: yellowing first, then seedling death.