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Cultivation methods of konjac: introduction of key cultivation points of konjac

Konjac is a perennial evergreen herb, belonging to konjacaceae and xiaozhuyu. Because its leaf surface has dark green and white or light yellow and alternate feathery stripes, just like the pattern on the peacock tail feathers, it is named peacock bamboo taro. Interestingly, its leaves stretch during the day and fold at night, which is very strange. Konjac is a typical foliage plant of Araceae, which is graceful and charming. This paper mainly introduces the cultivation methods of konjac.

Cultivation method of konjac konjac konjac konjac is native to America. It likes semi shade, high temperature and humidity environment, and is not cold resistant. The suitable temperature for growth is 20-30 ℃. Over 35 ℃ or below 7 ℃ is bad for growth. Overwintering temperature should not be too low, otherwise leaves are easy to curl. The soil should be loose, rich in sediment and well drained.

1. Soil: loose, fertile, well drained and humus rich loam should be used for potted cultivation of konjac. Generally, 3 parts of rotten leaf soil, 1 part of peat or sawdust and 1 part of sand can be mixed for preparation, and a small amount of soybean cake should be added as base fertilizer. Sticky garden soil should not be used. On the basin, the bottom of the basin first cushion 3 cm thick coarse sand drainage layer, in order to facilitate drainage.

2. Moisture: sufficient moisture should be given during the growth period, especially in summer and autumn. In addition to keeping the basin soil moist, water should also be sprayed on the leaves to cool and moisturize. It requires high air humidity, preferably 70% to 80%. Dry air and basin soil should not be allowed, but water should not be accumulated. The water content should be controlled after the end of autumn in order to survive the winter. If the environment is dry in winter, if it is too wet, the basal leaves will be yellow and scorched, which will affect its ornamental value.

3. Fertilization: the plant is short, the leaf color is dim, and the golden luster is not bright. During the growth period, the thin liquid fertilizer should be applied once every 20 days, and the ratio of nitrogen, phosphorus and potassium should be 2 ∶ 1 ∶ 1, which can make the leaf lustrous and bright. It is very beneficial for germination and growth to spray 0.2% liquid fertilizer directly on the leaf every 10 days. In winter and summer, fertilizer rotation was stopped.

4. Light: during the growing season from May to September, it should be placed in the shade or semi shade, keeping 40% - 60% light transmittance, avoiding the direct sunlight. Too strong light or dry air will easily cause the withered and scorched leaf edge and leaf surface mottling; But the light should not be too weak. If you put it in a dark room for a long time, the temperature is low and the light is insufficient, the growth will be weak, which is not conducive to the formation of the leaf color and the loss of the unique metallic luster of the leaf surface. Direct sunlight through glass is acceptable in winter.

Close up of konjac leaves

5. Humidity: konjac likes high temperature and humidity. The suitable temperature for growth is 18 ℃ - 25 ℃. It likes humid air. It grows fastest from May to October when the temperature is above 20 ℃. During the low temperature season from October to April of the next year, the North should move into the greenhouse to overwinter. The overwintering temperature in winter should not be lower than 15 ℃. Otherwise, the leaf color will be dark, the leaf will shrink, and the leaf tip will turn yellow. If it is slightly frozen, it can still grow in spring by changing the environmental conditions in time New leaves, such as severe freeze, leaves have died, or even the whole plant died. If the temperature difference between day and night is large, you can use plastic film to cover the basin or use glass box to keep warm and moisturize. Clean the leaf surface once a month with warm water to keep the color of the leaves.

6. Changing pots: every spring, when the temperature steadily rises to 20 ℃, the pots can be changed once. When changing pots, new culture soil must be added, and the residual roots and leaves must be cut off for re cultivation to facilitate growth.

7. Reproduction: konjac is propagated by ramets. Generally more than in the late spring and early summer when the temperature is about 20 ℃, combined with changing basin and soil. When the temperature is too low, the plant is easy to damage the root, affect the survival or make the growth weak. When dividing, the mother plant is pulled out from the basin to remove the old soil, and the densely growing plants are cut with a sharp knife along the growth direction of the underground rhizome, so that each clump has 2-3 sprouts and strong roots; after cutting, the mother plant is immediately put in the basin and fully watered, and placed in a cool place, and gradually moved to the light after a week. It is better to control the water at the initial stage, and then fully watered after new roots are developed.

8. Pest control:

scale

However, if the ventilation is poor and the air is dry, scale insects will also occur.

Control method: 1500 times dimethoate spray control.

Leaf spot of konjac

Leaf spot is yellowish brown. At the early stage of the disease, small yellow particles are formed near the edge of the leaf or in the center of the leaf, and gradually expand, deepen and turn to yellowish brown. There are obvious halos around the periphery of the disease spot. With the expansion of the disease spot, the leaves gradually dry and shrink, so that they fall off and die. The pathogen is conidia of deutschsprung's disease. The causes of the disease are high temperature and humidity, poor air circulation, too dense plants, too many weeds and rotten leaves in the cultivation environment, too much nitrogen fertilizer application, and excessive plant growth. Young tissue is easy to get sick.

Control methods: strengthen the management of fertilizer and water, properly increase the application of phosphorus and potassium fertilizer, less nitrogen fertilizer, promote the growth of plants to enrich, enhance their resistance. Timely removal of diseased leaves and weeds, reduce the source of infection. The plant is not easy to be placed too close, proper ventilation and light transmission, reduce the humidity of the environment, can reduce the incidence of disease. Spray medicine to protect patients when they get sick. The fungicides are: 50% carbendazim 600 times to 800 times; 75% chlorothalonil 600 times to 800 times; 50% mancozeb 500 times to 600 times, every 7 to 10 days. All kinds of drugs should act alternately to prevent the bacteria from producing drug resistance.

Potted cultivation of konjac: common varieties of konjac: 1. Also known as kudzu, the leaves are long oval, large and thin, green like velvet, zebra like feathery stripes on both sides of the ribs, and purplish red on the back.

2. Radix puerariae and Radix Curcumae. The leaves are broad and oval, green on the surface, indistinct stripes, and purplish red on the back.

3. Pueraria lobata Thunb. The leaves are green with yellowish pinnate stripes on both sides of the middle rib, dark purple on the back of the leaves and yellowish flowers.

4. White spot bamboo taro. The plant is 50-60cm high, with weak stems, large and thin leaves, ovate lanceolate leaves and irregular white patches on green leaves.

5. Double line bamboo taro. It is also called red feather bamboo taro. Its leaves are long oval, with light green surface and white or peach red parallel double line stripes on both sides of the middle rib. It is very beautiful.