Autumn extension tomato cultivation techniques

Reasonable irrigation and fertilization In order to reduce the hot season temperature and prevent diseases, it is advisable to infuse horse water in the morning and evening, moisten the surface and then drain the water to prevent the humidity from being too large and the roots to induce diseases and seedlings. Field soil is always moist. Top dressing combined with irrigation. After planting for 10 days, combined with cultivating and weeding and applying 3% compound fertilizer water; when the first ear fruit grows to the size of walnut, 10 kg of urea is applied per mu; when the third fruit is set, 10 kg of urea is topdressed.

Strengthen the pruning autumn delay tomatoes grow fast, timely pruning, pruning method using a single pole, that is, leaving only the main pole, the other side branches all destroyed, and erase the foot buds, put a good stand to prevent lodging. In late September, the heart was picked in time to leave three panicles, 3-4 fruits per panicle, and other fruits removed to improve the quality of the tomatoes.

Timely and appropriate use of hormones in order to prevent high temperature caused by flowering and fruit drop, in the autumn delay the tomato flowering period, with 15-20 mg / kg concentration of 2,4-D flower, a flower can only scratch once, but also in the fruit color white When using a 2000 mg/kg concentration of ethephon, ripen with a fruit stem. In the late period, fresh fruit cannot grow naturally because of its low temperature. Fruits can be soaked with ethrel at a concentration of 2000 mg/kg, and red at room temperature. Tomatoes can be marketed from late December to early January of the following year.

Prevention and treatment of diseases and insect pests in the autumn. The only pests that occur in tomatoes are downy mildew, brown spot, aphids, and tobacco budworms. Disease prevention can be treated with 800 times Daisenzinc or 600 times antivirus scorpion alternately, once every 7 days, even 3 times. Aphids can be treated with 40-50 times tobacco water or avermectin 3000 times. H. pylori can be treated with 20% cypermethrin 2000x.

The time for detaining the antifreeze button is determined by the weather. In order to ensure that the tomatoes have more than 50% of the fresh fruit and the morning market, when the temperature drops below 20 degrees Celsius, the shed is started. Immediately after the shed, observe the temperature inside the shed. When the temperature reaches 26 degrees Celsius, release the air in time, and gradually reduce the bleed time as the temperature decreases. When the temperature drops to 5 degrees Celsius, the shed will no longer let off.

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