Due to the drought before winter, many areas of rapeseed have not been weeded, and at present, farmers in the spring are anxious to weed rape, and must pay attention to the following points:
1. Grass weeds, rapeseed moss buds, alkenone stop using, you can use quinoafuran ester, high-efficiency flupiramide helin, spermoxazole grass spirit, fine quinoquinone
Among them, the field with a lot of grass must be compounded with the fine xanzole grass spirit
Early maturing grass, look at the field of wheat niangduo: quinopyriferate, high efficiency fluoropyridomethyl helin
It is best to use the amount in full: 50% more than the current dosage, depending on the situation
2. Broad-leaved weeds stop using grass to remove spirits during the first budding stage, and can only use dichloropyridine, and the stubble cannot plant broad-leaved crops
- Rape rape after the control of low temperature, drug damage problems?
These days there are many farmer friends to consult rape squat seedlings, leaf shrinkage, and the whole field uneven occurrence, through pictures, videos, combined with the analysis of the application of farmers friends, one is paclobutrazol, alclobutrazol overuse, or heavy spraying, paclobutrazol in the low temperature need to reduce the use of the second is due to rape sowing or transplanting too shallow, the stem base is exposed outside more, and then spray paclobutrazol is caused by frost damage, serious rape stem base swelling, necrosis, some people mistakenly think that it is rhizome disease, rhizome disease has rhizomes, This no nodule, not serious plot timely take biocide + regulator spray can alleviate part of it!
- Rapeseed chemical control problem
Some rapeseed grows too vigorously, the planting density is too large, some farmer friends want to give rapeseed control, but do not know when the control is appropriate, then for the last opportunity for rapeseed control after spring, it must be in the early stage of rapeseed bud pumping, the height of the moss does not exceed 8-10 cm, choose 5% enoxazole or 15% paclobutrazol 30-40 grams 30 kg. In this way, the length of the lower stem of rapeseed is shortened, and the growth of rapeseed branches is promoted, and it is anti-lodging and anti-freezing!
- Rape boron fertilizer problem
- Many farmers and friends do not know, when to spray boron fertilizer on rapeseed? Rapeseed is a boron-loving crop, if the lack of boron will lead to rape branches without buds, buds without flowers, flowers without fruit, real and no pods; rape spraying boron fertilizer generally needs to be twice: the bud stage and the initial flowering stage, you can use 21% pure boron 15-20 g / mu (bud flowering)
But there are still many farmers who do not know when to apply moss fertilizer and how much to apply? For moss fertilizer is generally applied when the bud of rape is 5 to 8 cm high, and 10-15 kg of urea is used to apply water to promote moss extraction and budding.
- Problems with rape sclerotia
Rapeseed into the vigorous growth period, the bottom of the old leaves began to die, especially rain, it is easy to occur sclerotia, so when is the best prevention and control of rape sclerotia? The prevention and treatment of general sclerotia requires two times, the first time in the rapeseed bud stage, and the second time in the rapeseed initial flowering stage, you can use Fumei Double. Methotrexate, sclerotium net, carbendazim. Propiotomazole
However, due to the special situation this year, the temperature of this period is low, if some of the frost or rape resistance declines, the rape rape sclerotia will occur in advance, then we have to look forward, such as chemical control + sclerotium, boron fertilizer + sclerotium control