Soft rot, rust, leaf blight, leaf spot, white silk, etc.
Scale insects, red spiders, etc.
(1) white silk disease: white silk disease is a common disease on the leopard grain taro plant; it is more serious from July to August; especially when the soil is too wet, it is particularly prone to disease; after this disease, the leaves and stems of the leopard grain taro will change from the initial white to yellow, and when it turns brown, it will be rotten, gradually extending to the whole plant to die.
② leaf spot disease: the peak period of leaf spot disease is from March to April and from September to October. After the disease, it mainly appears on the leaves, sometimes also on the leaf sheath. At first, it is in the spot state, and gradually changes to the reddish brown spot, which can cause a large number of withered leaves. The disease also occurs due to the main planting environment, such as poor ventilation, long-term rainy days, etc. the disease also has Infectious
(3) leaf blight: when the leaf blight occurs, it will start from the tip of the leaf, and spots will appear in the early stage, and then gradually expand, and the expanded spots will form large spots; when the disease is serious, it will cause the leopard grain taro to stop growing and slowly wither to death. This disease is mainly due to the high temperature, supercooling and unbalanced nutrition of its growing environment. It is also contagious. It can even be transmitted according to the air flow.
(4) rust: rust damages the leaves of the leopard grain of bamboo taro greatly. It changes from small spots at first to pustules, and finally turns brown. In serious cases, it can also lead to the death of the leopard grain of bamboo taro.
⑤ soft rot: when soft rot occurs, it starts from the root and leaves will turn dark green with spots; then leopard grain and taro will quickly rot and give off pungent odor. The occurrence of this disease is mostly due to the high temperature of the cultivation environment; the disease will spread with watering.
① put an end to it from the source, and select healthy and fine varieties that are free of disease and harmless when selecting seedlings.
② the soil should be loose, permeable and well drained; the surrounding environment should be warm and moist; the temperature should be well controlled, and it should not be overheated or supercooled; the fertilizer should be spread in a timely and appropriate amount; before planting, it can be sterilized with carbendazim..
③ during the cultivation period, observe the plants frequently, deal with the infected parts in time, and reduce the spread.
The characteristics of insect pest:
Scale insect: grows on the edge of the leaf, sucks the juice of the leaf to survive.
Starscream: Starscream is a common pest, but also absorb plant nutrition, plant nutrition loss.
Pest control method:
Control method of scale insects: if it can be controlled by spraying insecticides under the condition of not serious, if the whole plant is eroded, it will not be able to continue breeding. So we should observe it frequently.
Red spider control methods: if not serious circumstances can spray insecticides to control; pay attention to ventilation environment, often spray water on the back of the leaves, so as to prevent the reproduction of red spider
