1. The new leaves of cereal grains and herbage turn yellow, the lower part of the leaf sheath rots, and then the older leaves turn yellow. There are the damages of the herbaceous herbicides (such as sethoxydim,haloxyfop, quizalofop-p-ethyl, etc.).

2. Broad-leaved plants are stunted in growth, the green of the plants faded or turn purple, sometimes their veins become red or purple, the promeristem and primary meristem turn to death. Gramineous plants with stunted growth, interveinal turn to yellow or purple, cotyledons may not spread, lateral roots rare. There are the damages of imidazolinone or sulfonyl urine herbicide (imidazolinone, bensulfuron,chlorsulfuron, etc.).

3. White spots appearing on the leaves and the tips of cotyledons and true leaves turn white. It is exposed to herbicides such as flumioxazin(rapid harvest) or photosynthesis inhibitors such as atrazine and other herbicides.

4. The tip of the leaf fades green to white, sometimes yellow or pale green, and spreads down through the leaf margin. It is the herbicide of triazene that enters the plant through root absorption, such as atrazine, diuron and so on.

5. The lower part of the leaf fades green to white, sometimes yellow to orange, and spreads upward through the veins. It is a urea compound, which is caused by root absorption and conduction (e.g., chlorotoluron, diuron).

6. The main and lateral veins throughout the leaf become greenish and yellow and sometimes extend between the veins. They are ureacil, triazinone herbicide, such as bromacil, metribuzin.

7. The leaves of plants appear as white patches of water, which quickly turn brown. Is exterminator herbicide such as paraquat.

8. The leaf tissues appear small white spots (post-seedling spray of stem and leaf) or the leaf base becomes white and the middle veins become brown. Cell membrane destructor, such as acifluorfene, fomesafen, lactofen and so on.

9. The petioles of cotyledons and true leaves are discoloured from white to purple, spreading through veins and entering tissues from veins, such as fluorochloridone.

10. Albinism, color between veins from white to purple, veins themselves remain green for a long time. Strong herbicide, there are the damages of amitrole, clomazone.

11. The leaves first turn yellow and then brown, and symptoms begin at the new site, it is the harm of glyphosate.

12. The whole plant is suppressed and the leaves turn red and crisp, they are damages of asulam.

13. Buds short, stunted, leaves dark green and brittle. They are damages of cell growth inhibitors, such as trifluralin shitian fill and other herbicides.

14. The leaves and stems show hormone-like symptoms, the petiole shrinks, the leaf edges curl downward and turn purple, the stem is curved, sometimes thickened and cracked.

15. Leaves shrink and narrow, base veins parallel, appearing yellow and dark green areas. there are harm of root absorption growth regulator herbicides.