Will ferns die if they spray too much pesticides

It will cause drug damage. There are two types of drug damage: acute and chronic. The former has obvious symptoms from a few hours to 3-4 days after spraying, such as burns, wilting, leaf drop, flower drop, and fruit drop; The latter is a long time after spraying, such as poor growth, leaf deformity, late maturity, etc.

Common symptoms are colorful spots of varying size and shape on the leaf surface, local tissue scorching, perforation or leaf detachment, or yellowing, greening, or thickening of the leaf. The pesticide damage of commonly used fungicides and insecticides to cucumber The concentration of toxaphene is too large, which can make the cucumber internode shorter, showing dwarf symptoms, and the leaf margin is dry. Anti-mildew causes the leaves to produce microscopic ring dead spots.

If the concentration of the anti-frost elixir is too large, it can cause partial necrosis of the leaf margins and develop to the point that the leaf veins lose green, but the leaf veins retain their green color. Chlorothalonil.

In excess of pesticides, the veins of the near apical leaves of the plant are obviously green. High concentrations of manganese acaricide can cause green spots or necrotic brown spots on the foliage. The high concentration of malathion at the seedling stage is easy to hinder the growth point and the leaves are deformed.

Too high a concentration of aphid resistance will dry out the leaf margins of cucumbers. The use of antibacterial special from booting to grain filling stage of rice can reduce the seed setting rate of rice and not set seeds, and the impact of this pesticide damage on the yield of crops is irreversible.

It inhibits growth and can lead to death in the long term. Pay attention to the dispensing concentration. Refer to the instructions for use.

A large concentration of pesticides will kill plants, and even some pesticides will kill plants if they do not have a large amount of urine, such as herbicides.

To get rid of bracken, a broad-spectrum herbicide such as glyphosate can be used. Glyphosate is a non-selective herbicide that kills a variety of herbaceous and woody weeds, including bracken. The following precautions need to be taken when using glyphosate in the Friendship Hall:

1.Choose the right time. Glyphosate is best used during the bracken growing period, generally from spring to summer.

At this time, the bracken is most metabolically active and has the strongest ability to absorb glyphosate. 2.Choose the right concentration.

The concentration of glyphosate can be adjusted according to the actual situation. Often, good weeding results can be achieved by using concentrations. 3.

Spray glyphosate evenly when spraying the mold. When using glyphosate, it is necessary to ensure that the liquid is evenly sprayed on the leaves and stems of bracken to ensure that the effect of the medicine is maximized. 4.

Stay safe. Glyphosate is a toxic chemical, and it is necessary to comply with safe operation rules and wear protective equipment to avoid harm to people and animals. It is important to note that although glyphosate is an effective herbicide, it may also cause certain effects on the environment.

When using glyphosate, the instructions for use should be followed and not overdosed to avoid excessive harm to the environment.

Manual weeding (fern) is labor-intensive, and the use of paraquat to remove ferns and weeds in the forest is the most economical, safe and effective with a dosage of 250 ml 667m2, and the weeding effect can reach more than 97%, saving 80 180 yuan and 667m2 compared with manual weeding (fern).

Glyphosate can also be used for extensive removal of ferns.

The most suitable time for the use of 25 Sentai water solvent to control ferns is from early July to mid-August, and the most economical amount is 120 160ml per spray, and the weeding effect can reach more than 95