What is a hormonal herbicide?

What are the hormonal herbicides? How does a hormonal herbicide work? Also ask the netizens who know about it to help introduce. 1. Phenoxy carboxylic acids: the main varieties are 2mai 4 murine D butyl ester, 2 methyl 4 chloro sodium. The pathway of action is similar to that of indole acetic acid, a small amount of 2jin4Mel D can promote plant growth, but at high concentration, the differentiation of meristem is inhibited, the elongation growth stops, and the plant produces lateral growth, resulting in root and stem expansion, blocking and dredging tissue, resulting in plant death. 2. Benzoic acid: the main varieties are Triticum aestivum (herbicide). It also has an effect similar to that of indole acetic acid, which can lead to the cessation of apical growth and leaf formation, tissue proliferation and abnormal plant growth. 3. Quinoline carboxylic acids: the main varieties are dichloroquinolinic acid (paspalum) and chloro-potassium quinolinic acid. It can effectively promote the biosynthesis of ethylene, lead to the accumulation of abscisic acid, reduce stomata, reduce water evaporation, reduce carbon dioxide absorption and slow plant growth. Interestingly, dichloroquinolinic acid can effectively control barnyardgrass, chloro-potassium quinolinic acid can effectively control pig calamity. 4. Thiazole carboxylic acids: the main varieties are Caochuling (Gotek). After application, it is absorbed by leaves and transported to the whole plant. The symptoms of weed poisoning are stagnation of growth, stiff green leaves, thickening and reverse rolling, twisted new leaves, shortening of internodes, and finally death. The effect of high temperature is quick, while that of low temperature is slow. 5. Pyridyloxyacetic acid: the main varieties are chlorofluoropyloxyacetic acid (make it long), trichloropyloxyacetic acid (cover irrigation energy) and so on. After application, it is quickly absorbed by plants and transmitted to all parts of the plant, making sensitive plants deformed and distorted. The specific mechanism of its action is not clear at present.