In spring, the weather gets warmer, and wheat enters the growing season, especially the jointing and booting stage. It is the fastest growing period of wheat, the most growing amount, the most fertilizer and the most water-requiring period, which determines the number of spikes and grains per spike. Critical period. Therefore, two things must be done in the spring management of wheat:
1. Do a good job in the prevention and control of diseases, pests and weeds in spring
For plots where there is no weeding before winter, we must seize the best time for the temperature rise in spring to prevent weeds and do a good job in weed control. According to different types of weeds, chemical weeding should choose high-efficiency, low-toxicity, and low-residue pesticides for comprehensive pest control.
Control method: the spring control of broad-leaved weeds is carried out before the jointing of wheat, generally in mid-to-late March, choose to spray in windless weather. The main control agents are tribenuron-methyl, and the wheat fields are mainly sorghum and shepherd's purse. Use 10-12 grams of tribenuron-methyl per mu and spray 30 kg of water evenly. For wheat fields with a lot of Maijiagong, pig seedlings, and sleyballs, a ********* compound should be used, such as 40% quinsulfuron 2 g + 10% tribenuron-methyl 8 per mu 7-10 grams per mu or 36% Pentium per mu, spray 30-40 kilograms of water evenly. It should be reminded that it is not advisable to apply herbicides to wheat fields that have been jointed, and herbicides containing 2,4D butyl esters are prohibited in high-quality wheat fields.
Control of gramineous weeds: For wheat fields with brome as the dominant species, use 3 grams of 70% tiger per mu plus 10 grams of special additives to spray 30-40 kilograms of water evenly; mainly candle grass and mai Niang For wheat fields, use 15% wheat pole 15-20 grams per mu to spray uniformly; wheat fields dominated by Jiejie wheat have poor effect in spring, and manual extraction is generally adopted, and the time is controlled in late April to early to mid-May.
Combining with spring weeding and adding corresponding insecticides and fungicides, it can also cure diseases and insects, and achieve the purpose of one spray and multiple prevention.
2. Promote the weakness and control prosperity, skillfully apply jointing booting fertilizer
First of all, according to different fields and different seedling conditions, classify and guide, grasp the best period of application of jointing booting fertilizer, master it when the leaf color fades, the first internode length of the base is fixed, and the peak seedlings begin to fall, topdressing per mu 4-5 kilograms of urea is used for strong stalks and prevention of falling, and 5-8 kilograms of potassium chloride are applied simultaneously per mu. If the colony is too large or has grown in the field, it is necessary to control it, do not fertilize, or delay fertilization by watching the seedlings, and spray fertilizer outside the roots. For fields that are under-grown and de-fertilized, apply early and appropriately increase the amount of fertilizer.
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