Why not weeding manually
We often mentioned in the konjac planting technology training that one of the most important aspects of konjac field management is not to manually weed.
Why can't we weed it manually? We can illustrate by a few pictures of the morphology of the konjac during its growth period.
In addition to being a large tuber, konjac also has many roots and fleshy stems. The root of course absorbs nutrients for the growth of the konjac, and the fleshy stem will differentiate into a new konjac species, which is commonly known as the "arrowhead", which we call the taro whip.
From the picture, we can clearly see that the roots of konjac are all over the middle and upper part of the whole konjac tubers, especially the densest around the plant seedlings, while the taro whips are completely concentrated on the upper part of the konjac bulbs, distributed around the plant seedlings, and are horizontally horizontal. Extension growth.
In other words, the roots and whip of konjac are distributed on the surface of the soil. Under normal circumstances, the roots of field weeds are also distributed on the surface of the ground, and they are often the roots and whips of konjac closely intertwined.
Just imagine, if weed the weeds manually, did the roots of the konjac also be damaged when the weeds were pulled out? The growth period of konjac is basically the season when the temperature continues to rise. If there are a large number of wounds, it will inevitably lead to the outbreak of soft rot. Even if it does not occur, the damage of a large number of rhizomes will inevitably lead to a serious decline in the output of konjac.
Konjac tends to grow well in the wild. One of the main reasons is that no one interferes with it and its growth process is not damaged. So when we plant in the field, we must fully consider this issue.
It is normal that there are moderate weeds in the konjac field. However, if the weeds grow excessively, the yield of konjac will inevitably decrease due to the overgrowing of the weeds. How to effectively control the growth of weeds without damaging the roots of konjac and without artificial weeding?
Before sowing the konjac, weeds in the field must be cleaned; after sowing, apply a pre-emergence herbicide immediately; at the seedling stage, artificial weeding can be done, because the root system of the early konjac has not fully matured, and artificial weeding will affect it. The impact is not significant, but you must be cautious, and try not to turn the soil layer close to the taro seedlings during operation.
If there are too many weeds in the mid-growth period, quizalofop-p-ethyl is a low-toxic herbicide, which has obvious effect on annual grassy weeds such as crabgrass, setaria, wild oats, brome and cypress. Of course, out of precaution, it is still necessary to avoid spraying directly on the konjac plants when spraying.
As for the middle and late stages of konjac growth, moderate weeds in the field will not have much impact on its growth. If the early control of weeds is done well, there will not be too much grass in the later stage. It is recommended not to consider weeding.
