Key prevention wheat fields
First, wheat fields with premature planting, excessive planting volume, total stems per mu before wintering of more than 800,000, and maximum tillers of more than 1 million in spring, are prone to field closure, poor ventilation and light transmission, weak internodes at the base, and stem support Low force may cause lodging.
The second is the wheat field from the stand up to the jointing stage when the leaf color is dense green, the leaves are hypertrophy and the undercoat is longer than 1/3 of the whole leaf.
The third is the wheat field where the first and second nodes of the planted varieties are long, the stems are weak, the toughness is poor, and it is easy to lodging.
Fourth, there is sufficient or even excessive fertilizer and water, especially the excessive amount of nitrogen fertilizer, resulting in wheat fields with long wheat, internode length, and weak wheat seedlings.
Precaution
One is to rationally fertilize and water. For the wheat field that is at risk of lodging, additional phosphorus and potassium fertilizers are applied, and the nitrogen fertilizer is moved backward. The watering time of top dressing can be postponed to the jointing period.
The second is timely control. For wheat fields with potential lodging, use 15% paclobutrazol 40-50 g / mu, or 5% uniconazole 30-40 g, or 25% auxin 15-20 ml, and water 30-40 kg during the starting period. Spray the young wheat evenly. Note that the chemical control of wheat must be carried out before jointing. After jointing, the prevention effect will not be achieved.
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