First, the variety selection of summer and autumn open-field zucchini has a high temperature in the early stage of growth and development, and cotton aphid and Bemisia tabaci are more serious, which is easy to cause virus disease and silver leaf disease, so it is very important to choose varieties. It is highly recommended to choose Shengrun Xiaqiuwang, Shengrun Rekangwang, Shengrun 806 and Shengrun Lvfei from Shengrun Animal Husbandry in Henan Province, SQ2 10 from Ansa Company in the Netherlands, etc. This variety is mature, resistant to high temperature, resistant to virus disease and downy mildew, and the melon color is not easy to whiten and green under continuous high temperature, with long melon strips, good commodity and compact plant shape.
Second, cultivate strong seedlings of school-age zucchini in autumn in Henan Province. Generally, it is pre-seedling or live broadcast room around August 15 (in other regions, it is earlier or later according to the temperature). In the pre-seedling stage, the seedling stage should be shaded, waterproof and rainproof to prevent the harm of cotton aphid and whitefly in advance and reduce the chance of virus disease. Autumn zucchini is suitable for seedling age 10- 12 days, and seedlings can be planted when 2-3 leaves come out. When the seedlings are too old, it is easy to damage the roots, which is not beneficial to slow down the roots and is easy to cause viral diseases.
3. Soil preparation and fertilization Select the land of non-melon vegetable plants in the previous crop, and carry out soil preparation before planting 1 week. In order to increase the yield of summer squash, it is necessary to use 5000Kg of high-quality compost organic fertilizer and 30KG of light fertilizer three-element compound fertilizer as base fertilizer 1 mu, and subsoil and fine harrow to make the surface soil and chemical fertilizer fully mixed (deep application is the best). After watering, this water must be watered by the flood.
Fourth, when planting, you must choose a sunny afternoon (check the weather forecast first, and choose 2-3 sunny days after transplanting), and choose 2-3 strong seedlings with thick stems, short nodes, short stems, dense and fat leaves, compact plant shapes and well-developed rhizomes, with a plant spacing of 50cm and an acre planting1200-. Multi-row planting adopts triangular planting method, so that the plants in two rows are separated from each other, which improves the natural ventilation and light transmission ability and reduces the problem. When planting, the plastic film mouth around the seedlings must be buried with * to prevent the hot air from emitting from the plastic film and baking the seedlings to death.
Five, field management from planting to sitting melon, to drain water, control fertilizer, promote roots, seedling, prevent flourishing growth as the leading factor. After planting 1 week, according to the specific development situation, root-slowing water can be watered once, and compound fertilizer 1 0 kg can be applied with the water1mu to promote root-slowing and tree growth, laying a good foundation for more melons and big melons. This time, we must pour small water, and avoid flooding to prevent it from growing, which will cause flowers to fall and fruits to fall. According to the situation of young seedlings, if vigorous growth occurs, 600 times of 50% chlormequat chloride can be sprayed to avoid vigorous growth. After watering and fertilizing, soil should be loosened in time to improve soil permeability.