First, get up to the jointing stage
Spray control against sheath blight and grass damage
During the horizontal infestation of early wheat sheath blight, chemical weeding can be carried out in spring, and oxazolol pesticides can be added when spraying herbicides to achieve the effects of controlling weeds and sheath blight; When the rate of the diseased plant in the field reaches 15%, the control can be started. It can be used with 20.5% diniconazole wettable powder 20-30 g, or 20% triazolone wettable powder 50-100 g, or 20% Jinggangmycin? Bacillus cereus (Mycobacterium) suspension 60-100 ml spray with water spray control. When spraying, pay attention to appropriately increase the water consumption (the general water consumption is not less than 45 kg), and aim at the base of the wheat stem.
In the wheat field where no chemical weeding is carried out before winter, the wheat is raised to the jointing stage. When the broadleaf weeds are in the 2-4 leaf stage, the herbicides such as sodium dimethyltetrachloride and bensulfuron can be used for chemical weeding, and the above sterilization can be carried out. The agent is properly mixed and sprayed.
Second, the booting to the flowering period
Septic soil
The middle and late April is the wheat booting stage of our province, which is also the peak period of the sucking worms. This is the best time to control the larvae. Can use 5% chlorpyrifos powder 600-900 grams, or 2.5% or 3% methylisophosphorus powder 2 kg, formulated into 25-30 kg of poisonous (sand) soil, sown wheat ridge evenly spread the surface, toxic soil Post-watering can improve the efficacy. Care should be taken not to use dew to spread the medicine, and to use the broom, branches and other utensils to drop the poisonous soil on the wheat leaf on the ground, so as to avoid waste and reduce the efficacy.
From late April to early May, it is a critical period for the prevention and control of stripe rust. If leaf rust occurs, when the average diseased leaf rate in the field reaches 0.5%-1%, large-scale emergency control should be organized immediately.
Third, the filling period
Promote "one spray multiple defense" technology
The filling period is a key period for wheat to fight for 1000-grain weight. It is necessary to vigorously promote the "one-spray and multi-proof" technology and continue to strengthen the adult larvae, wheat bran, wheat sheath blight, powdery mildew, stripe rust, scab and leaf blight. Prevention and treatment. Control of the larvae and aphids, can be controlled by spraying with 4.5% beta-cypermethrin, 50% zinc thiophosphorus, or 3% acetamiprid (10% imidacloprid) 1000 times. In addition, in these liquids, add 1.25-2000 times dilution factor to 12.5% ​​diniconazole or 25% tebuconazole, or 1000 times dilution factor plus 20% triazolone or 50% carbendazim mixed spray. It can simultaneously control stripe rust, powdery mildew, sheath blight, leaf blight, etc., to achieve a multi-spray effect.
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