There are many varieties of sweet corn, including fresh food, processed and vegetable varieties. For sweet corn for fresh food, it is advisable to choose varieties with fresh sweetness, thin skin and good taste, such as "Super Sweet 204" and "Super Sweet 2018". These two varieties can also resist a variety of corn diseases.
Sowing to extend the harvest time of fresh sweet corn, it is advisable to sow in batches many times. Early and mid-maturing fresh sweet corn can generally be sown in spring or autumn. The suitable period for spring sowing is from the end of March to the beginning of April, and the suitable period for autumn sowing is from the beginning of July to the end of July. According to practice, early spring sowing, less damage from underground pests and corn borer, early harvesting period, good quality; late sowing is easy to raise seedlings, but it is easy to lack seedlings when planting, fresh ear corn borer is more harmful and poor quality.
Choose seedling fields with leeward wind and sunny, fertile soil and good drainage. Because sweet corn contains more sugar, less starch, shriveled seeds, weak growth potential, shallow sowing is recommended. For seedling cultivation in a small arch shed, the seedling field must be watered thoroughly before sowing.
The survival rate of transplanting was the highest when transplanting two-leaf and one-heart seedlings. Before planting, ditch deep application of base fertilizer. Use 20 kg of superphosphate, 20 kg of potassium chloride or 40 kg of compound fertilizer per mu to achieve planting with phosphate fertilizer. Appropriate dense planting, about 3200 plants per mu. Water dilute manure water after planting to facilitate the return of seedlings.
It is necessary to use quick-acting fertilizer for topdressing with 6-7 leaves in the seedling stage and 10-15 days before tasseling. Sweet corn has many ears and tillers, which should be removed in time during management. To prevent and control insect pests in time, cutworms can be planted with phoxim 1000 times solution and watered during fertilization. Corn borers can be sprayed with 80% dichlorvos or other corn borer pesticides at the flaring stage or when the ears are just exposed.
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Feline Infectious Peritonitis (FIP), referred to as Feline Infectious Peritonitis (FIP), is a fatal abnormal immune response that occurs in cats. It is caused by the mutation of the feline coronavirus carried by cats. As a high-incidence and fatal disease of pet cats, the current incidence of feline abdominal transmission is about 10%.
The symptoms of cats are usually divided into two categories, namely wet FIP and dry FIP, of which wet FIP accounts for the majority of all cases. About 70%, manifested as abdominal pleural effusion, abnormal bulging; dry FIP cats have different symptoms, depending on the type of organ affected by the virus.
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