Which symptom is associated with the application of pigment inhibitors?

The application of pigment inhibitors typically leads to symptoms that disrupt the normal pigmentation processes in plants. When these inhibitors are introduced, they can prevent the synthesis of chlorophyll and other pigments essential for normal leaf coloration and functionality. As a result, affected plants often exhibit a characteristic symptom of white or pale leaves. This is primarily due to the reduction or absence of chlorophyll, which is what gives leaves their green color; the lack of this pigment causes the leaves to appear white or yellowish.

In contrast, other symptoms like leaf necrosis, chlorosis, and thickened stems generally relate to different physiological issues, such as disease, nutrient deficiencies, or environmental stresses rather than directly to the action of pigment inhibitors. In the case of chlorosis, while it involves leaf yellowing due to a lack of chlorophyll, it does not typically lead to a complete loss of pigmentation that would cause leaves to turn white. Therefore, the symptom of white leaves is specifically linked to the use of pigment inhibitors.