Herbicides will definitely have an effect on walnut trees, because the herbicide itself kills green plants. However, the normal and rational use of herbicides will not have a great impact on walnut trees, and even if it is a walnut orchard, it is also necessary to use herbicides, especially large-scale walnut orchards, it should be said that it is necessary to use herbicides, otherwise, all rely on manual weeding, the cost will be very high, and the effect will not be ideal.
So, is the herbicide harmful to walnut trees? What herbicides are the most harmful? How to use the most harmful?
1, if the use of herbicide varieties is not the right way, the use of the wrong way, certainly harmful or even very harmful, on the contrary, reasonable selection of herbicide varieties, scientific use, beneficial and harmless;
2, daily use of herbicides, walnut trees are the most sensitive is "acetochlor". The harm of acetochlor to walnut trees is mainly manifested as atrophy and drying of young leaves, and the shedding of female flowers and young fruits. However, there is no need to talk about tiger discoloration, if your walnut orchard is in the cornfield wind, or above the surrounding cornfield, or there are tens of meters of spacing, it will not cause a big impact. If the cornfield is close to the walnut orchard, it can be isolated with a shelter forest, and neighbors can be advised to use "sec-butylamine" instead of "acetoxaline", and there are many ways to solve this problem. Neighbor farmers in my walnut test demonstration garden grow corn and also use acetochlor, and I generally advise them not to use medicine when the wind is facing my walnut orchard, so far, no serious harm has been found;
3, the use of herbicides on windy days, sensitive herbicides of course will be very harmful, even if it is relatively safe herbicides, it will also endanger walnut trees, is a three-point poison of medicine, closed type, touch type, conduction type herbicide, although the mechanism of action is completely different, but will damage green plants in different forms, including walnut trees, otherwise it is not a herbicide. Windy days cause herbicides to drift widely and are certainly harmful. However, the average farmer also has a certain knowledge and awareness, the herbicide drifts on the wind day, and the weed control effect of the natural land is also poor, and the medicine is generally not used on the wind day.
Trees, like other crops, should be selectively used and pay attention to how the herbicide is applied.
Some herbicides can not be used at all, basically belong to the extremely sensitive type, such as "acetoxaline", walnut trees are extremely sensitive, even if the adjacent plot spray, will also cause falling flowers, leaves, fruit fall, and poor growth, but generally not to death, unless walnut seedlings;
Killer herbicides, including preaching root-killing glyphosate and touch-killing green paraquat, can be used in walnut orchards, but their use must be strictly controlled, otherwise it will have devastating consequences:
(1), glyphosate as far as possible to choose late spring and early summer, plant growth, strong absorption capacity of the season to use, premature absorption capacity is limited, can not kill the weed roots; after the same poor absorption capacity, and weeds have been dense, easy to accidentally injure walnut trees;
(2), glyphosate contact herbicide, mainly for annual weeds, spray timing mastery in the full leaf development but not yet aging stage, a little earlier effect is good, the later the effect is worse, and requires uniform and meticulous spraying to all leaves;
(3), soil closure herbicide, walnut orchard less harmful including lasso, dileamine (sec-butylamine, sec-butylamine), after spring fertilization and watering, grass seeds before the emergence of spraying on the surface, can kill the weed germ, young stems in the process of excavation.
All herbicides, which are three points of poison or even very poisonous, pay attention to spraying on windless days, and pay attention to employee protection, wear masks and gloves, and prevent accidental ingestion
In short, herbicides are harmful to walnut trees, but generally do not affect the construction of gardens, especially large-scale gardens, even if they are endangered, they are also the edge of the garden, and they will not be harmed and seriously damaged every year.
What good advice or methods do you have for the use of walnut tree herbicides? Welcome to share the message interaction!