I, morphological characteristics and ecological habits

Okra was a perennial herb, deciduous shrubby, plant height 1-2m, stout, clustered stems, obliquely out of the smooth by the white powder. Single leaves alternate, leaf length 8~22cm, leaf back and stalk with gray stellate hairs, leaf shape variable. The base is rounded, and the margin is comb-toothed. Flowers large, 28cm in diameter, solitary in the leaf axils, pink, red, purple, white and other colors, flowering from mid-June to late September.

Dahlia okra sun-loving, intolerant of shade, preferring a warm and humid climate, afraid of drought, more tolerant of water and humidity, in the deep fertile and good permeability of the fertile sandy loam soil in the most luxuriant growth. Resistant to mild saline soil.

Two, planting and fertilization management

Dahlia okra planting in early spring or late autumn can be planted, planting should be applied by the rotting and fermentation of cattle and horse manure or dried chicken manure as a base fertilizer, the base fertilizer needs to be fully mixed in the planting soil. Spring planting should be planted appropriately shallow, late fall should be planted appropriately deep, after planting should also be piled up soil for cold insulation. Immediately after planting in the spring, water the first water, after five days to water the second water, and then after a week to water the third water, and then once a month to water thoroughly. Seedlings planted in late fall, watering a thorough watering can be piled soil insulation. Summer rainy days to timely remove stagnant water. Large-flowered okra likes fertilizer, after applying bottom fertilizer when planting, (seedlings planted in the spring) can be applied in small quantities at the beginning of April with some nitrogen, phosphorus and potassium compound fertilizer. The end of autumn combined with watering frozen water shallow application of a leaf-rotting fertilizer.

three, pruning

Okra's natural crown shape is relatively loose, maintenance process can be pruned according to the needs of the garden, one should pay attention to can not affect the pedestrians; Second, for too long branches to be short cuts, to prevent their impact on the crown shape; Third, after the flower if you do not stay in the seed should be timely to the remnants of the flower cut out to prevent too much consumption of nutrients; Fourth, the overcrowding of branches for pruning to make the plant to maintain the ventilation of the light; Fifth, in winter Before the ground should be cut off the branches and stems, in order to facilitate the heap of soil to prevent cold.

Four, pest control

Okra common disease is leaf spot disease, this disease is a large flower of okra and common disease, generally harm the plant's leaves. This disease is caused by the infestation of hemipteran fungi, high temperature and high humidity in summer is the peak of the incidence of the onset of the initial leaf surface bearing light black spots, with the development of the disease, the spots gradually expand into plaques, and ultimately connected to a piece of the leaf blades rolled and then fall off. For the prevention and treatment of this disease, one should pay attention to the nutritional balance, not partial application of nitrogen fertilizer; two should pay attention to plant ventilation and light, too dense branches in time for pruning; three, if there is an onset of the disease, should be used to spray 75% metribuzin wettable powder 1000 times, every seven days, spray two to three times in a row to effectively control the disease.

Dahlia okra common pests have golden turtle, if released, one is to control grubs, available 50% phoxim emulsifiable concentrate 250 ml, plus 2.5 kg of water, sprayed around the plant; two is available insecticide lamps to trap adult insects; three is to use the green stiffness bacterium to infect and kill the larvae.