Identification and control methods for diseases of the Brazilian wood plant
Gray mold control:
During cultivation, the soil must be moist and sunlight abundant, and the soil is required to be loose, fertile and well drained, with the wintering temperature not lower than 16°C. When the disease occurs in the rainy season, remove diseased residues, drain promptly after rain, prevent moisture from lingering, and strengthen ventilation and light penetration. In the early stage of the disease, spray with 50% iprodione wettable powder at 1000 times dilution, or 50% Miemei Ling wettable powder at 800 times dilution, or 30% Dali Shui suspension concentrate at 800-900 times dilution.
Fusarium moniliforme leaf spot control:
Brazilian wood plants placed in a greenhouse or room should not be too densely arranged, and should be handled gently when moved to prevent wounds from collisions between branches and leaves. When the disease occurs, spray with 25% benomyl cyclohexylzinc emulsifiable concentrate at 800 times dilution, or 75% chlorothalonil wettable powder at 600-700 times dilution, or 50% thiophanate-methyl·sulfur suspension concentrate at 800 times dilution, spraying once about every 10 days for 2-3 consecutive sprays.
Anthracnose control:
Mix garden soil, leaf mold and wood chips or sawdust in a 2:1:1 ratio as the potting substrate. From April to August, during the peak growing season, apply a light fertilizer once every 20-30 days, and place under bright indirect light so that the plant grows vigorously and its disease resistance improves. In the early stage of the disease, spray with 50% thiophanate-methyl·sulfur suspension concentrate at 800 times dilution, or 25% Tanteling wettable powder at 500 times dilution, or 30% copper oxychloride suspension concentrate at 600 times dilution, or 10% Shigao water-dispersible granules at 3000 times dilution, or 70% thiophanate-methyl wettable powder at 1000 times dilution, or 50% compound thiophanate wettable powder at 100 times dilution, or 50% benomyl wettable powder at 1000 times dilution.
That is the introduction to Brazilian wood prices and disease control. To learn more, please follow the Four Seasons Plants website!
Disease control of Brazilian wood
Brazilian wood is an evergreen tree of the Liliaceae family. It is more than 6 m tall, and 50 cm-150 cm tall as a potted plant, with branches; the leaves are clustered at the top of the stem, 40 cm-90 cm long and 6 cm-10 cm wide, curved in an arch shape, bright green and glossy. The flowers are small and inconspicuous, fragrant, and it is a famous new-generation indoor foliage plant. The plant form is graceful and neat, and it tolerates slight shade. It likes high temperatures, and below 13°C the plant goes dormant and stops growing. It likes loose, well-drained soil; use leaf mold or peat soil for potting. It is propagated by cuttings; large numbers of cuttings are all imported from abroad. Cuttings require relatively high temperatures. It likes semi-shade sunlight and ample fertilizer. Commonly cultivated plants of the same genus include: Dracaena deremensis, lucky bamboo, Dracaena godseffiana and dragon tree, etc. Disease control of Brazilian wood.
Disease control of Brazilian wood
How to nurse it back when it wilts
During the growing season, Brazilian wood should be given appropriate foliar topdressing, spraying the leaves with nutrient diluted 100 times, once every half month. After several years of cultivation, when the plant is too tall or the lower leaves of the stem have fallen off and the plant form is poor, it should be pruned. Repot or change the soil every early spring.
For potted Brazilian wood, if the environment is unsuitable, it may be harmed by red spider mites, thrips, scale insects, etc. In addition, excessive ventilation, drought, irregular watering and overfertilization can all cause the leaf tips to scorch. Controlling watering in winter is key for Brazilian wood; generally water as little as possible depending on the indoor temperature. Too much water will cause root rot, and winter is not suitable for cuttings, so even if discovered it is hard to save. So I advise fellow flower lovers not to water too eagerly in winter.
You can slightly pry open the bark of Brazilian wood to check the necrotic area; normal tree flesh is light green and moist. When the tree flesh is found to be dark brown, you can cut off the trunk and keep the section with green tree flesh for cuttings. If it is all dark brown, unfortunately there is no saving it! This is because only trunks whose tree flesh is light green can survive sand cuttings or water cuttings. Water cuttings should be done when the weather is not too hot, around 25°C, changing the water once every 3-5 days. In summer or when the temperature is high, change the water once a day. You can put some charcoal pieces in the water to prevent rot. Sand cuttings are more trouble-free: let the cut trunk dry a little, seal both ends with wax, and insert one third into the sand. Water thoroughly and place in semi-shade. Also, do not spray water on the leaves in winter, as it easily causes heart rot. Note: pry the bark open slightly just to check, do not strip all the bark off.
Causes of yellowing and withering
1. Waterlogging: watering too much, with water accumulating in the saucer, will cause the plant roots to lack oxygen and rot, thus causing the leaves to yellow and wither. The solution is to remove the saucer from the Brazilian wood, water as little as possible, and preferably change the soil once.
2. Pests: the symptoms you describe may be red spider mites or thrips (it cannot be scale insects), so use Manguang at 1:1200 dilution (cypermethrin is also fine), 2-3 times a week (in winter it must be sprayed at noon), for 2-3 consecutive weeks.
3. Temperature: is your home heated? Too much heating or no heating at all will both affect the growth of tropical plants such as Brazilian wood (I guess your situation is very likely this one). If the heating is too strong, the indoor temperature and evaporation are correspondingly higher, so you should increase the number of times you spray water on the leaves each day to maintain the plant's moisture. If the heating is not on, the indoor temperature is lower (in Chongqing, for example, we do not need heating in winter), and when the plant is chilled its leaves will rot and yellow; the solution is to wrap the entire Brazilian wood plant in plastic film, or cover it with a large plastic bag, then move it indoors to a warm, sheltered spot (even the bathroom works, but be careful to maintain moisture), and move it out again in March of the following year. Finally, no matter which of the above symptoms your Brazilian wood has, you must prune the yellow leaves. Remember to cut the cut into a | or / shape to reduce the wound area, and spray carbendazim at 1:1000 dilution to prevent infection.
Pest control
Brazilian wood sometimes shows scorched leaf edges, scorched leaf tips and similar phenomena; these are mostly physiological diseases caused by drought, too low temperature, improper watering or fertilizing, etc.
The control method is: improve cultivation management, control temperature and humidity, fertilize reasonably, and ventilate appropriately.
The leaves of Brazilian wood should be kept clean regularly, and once pests occur, remove the pests promptly. The sugarcane borer moth is quite harmful to Brazilian wood; you can move the affected Brazilian wood outdoors to a cool place and spray with 40% omethoate emulsifiable concentrate at 1000 times dilution or 90% trichlorfon at 800 times dilution, once a week for 3 consecutive times.
For the common leaf spot and anthracnose damage, spray with 70% thiophanate-methyl wettable powder at 1000 times dilution.
Pests include scale insects and aphids; you can use 40% omethoate
How to grow Brazilian wood? Water culture method and care guide for Brazilian wood
Brazilian wood, also called Brazilian iron tree, Brazilian thousand-year wood, and fragrant dragon tree, has a neat and graceful plant form, a tall and straight stem, and leaf edges with wavy undulations, verdant and dripping with green, with high ornamental value! Because its stem and leaves are gorgeous, and it is one of the few plants grown for its stem, it is suitable for placement in a bright spot. Now let us learn about the water culture method and care guide for Brazilian wood.
1. Water culture method
(1) Saw the perennial stem of a large columnar Brazilian wood into stem sections of different lengths, or cut off the leafy branches growing on the stem as material. For stem sections used as material, the upper end needs to be coated with wax.
(2) Choose a glass container with a planting cup.
(3) Cut off the Brazilian wood, keep the top leaves, remove the lower leaves, and let it dry for a few days first. Then soak 1/3 of the Brazilian wood stem cutting in water, changing the water once every 3-5 days; you can add some carbendazim aqueous solution for preservation and disinfection. At this time, be careful to maintain a relatively high temperature and place it in bright indirect light to promote rooting.
(4) In the early stage of water culture, appropriately add foliage plant nutrient solution at 1/2 the specified concentration, add clear water once every 7-10 days, and renew the nutrient solution once every 25-30 days, at pH 5.5-6. The nutrient solution level should not be too high at the start; submerge 1/2 of the root system.
2. Care guide
(1) Light and temperature
Brazilian wood likes a hot and humid climate. It is highly adaptable to light and can grow with slight shading or in sunlight, but in spring, autumn and winter it should receive more sunlight, while in summer it should be shaded or placed indoors in a well-ventilated spot. Brazilian wood is afraid of cold and freezing; in winter it should be placed indoors in a spot with ample sunlight, and the temperature should be maintained at 5-10°C.
(2) Watering
In summer when temperatures are high, you can use misting to raise air humidity and spray water on the leaves to keep them moist.
(3) Pest and disease management
Water-cultured Brazilian wood sometimes shows scorched leaf edges, scorched leaf tips and similar phenomena; these are mostly physiological diseases caused by drought, too low temperature, improper watering or fertilizing, etc. The control method is to improve cultivation management, control temperature and humidity, apply nutrient solution reasonably, and ventilate appropriately.
That is the water culture method and care guide for Brazilian wood compiled by the Huinong website editors. Have you all learned it?