Autumn is the multiple occurrence period of Isatis disease, and the disease will affect its yield and quality. Prevention and control of Radix Isatidis must be treated with the right medicine in order to achieve a multiplier effect. The symptoms and control methods of several common diseases that are easy to occur in autumn are described below:
Downy mildew symptoms: damage the leaves. Plants on the lower part of the plant near the ground attack first and gradually spread to the upper leaves. At the beginning of the disease, only the back of the leaves appeared grayish-white moldy, and there were no obvious lesions on the leaves, and the damaged part was uneven. Further development led to greenish round spots, which later changed into brownish brown spots. The edges of the leaves become brown and dry until the entire leaves die. This disease field is prone to humidity when the humidity is high and the temperature is high. Prevention and treatment: timely drainage after heavy rain drainage, to maintain a smooth sulcus; excessive branches and leaves should be removed to maintain ventilation and light; the initial stage of the disease with a 1:1:100 Bordeaux mixture or 50% carbendazim spray 800 times Face, 1. Harvest According to the situation of feeding groups, from April to November can be harvested. Harvesting methods can be induced by food and utensils.
(1) Food inducers spread large plastic sheets in the rearing tank and sprinkle some sugar, rice grains, pots, animal bones, or other ant-like items on top. When a large number of ants come to eat, they are quickly swept into a plastic bag using a soft pick. Can also be used jars, jars, jars and other containers, coated with a layer of food on the inside, or in the container placed a piece of raw chicken, bones, etc., buried in the pool, mouth and ground level, will soon be able to attract some ants.
(2) Induced by a piece of bamboo (one end is opened by bamboo and the other end is kept by bamboo). Pour some cake scraps, honey, sugar solution or other ant-like food in the bamboo tube to become an ant inducer. . Place it near the ant nest, forcing the ant colony to flee from the ant colony, and then take the opportunity to introduce the ant into the inducer.
2. Processing Put the collected ants into a container bucket filled with water and drown (don't use hot water to kill ants), remove, dry, or dry. Pay attention to moisture deterioration during storage. Ants can also be soaked. After the ants eggs are collected, they are rinsed with clean water and put into sugar or salt to make sauce.
Once every 7 days, spray 3 to 4 times.
Root rot symptoms: endanger the roots. When it occurs, the roots of the fibrous roots and the root tip of the main root are first to be victimized, which is dark brown and brown to the root vascular bundle. In the later period, the whole roots were rotted and the plants on the shoots were wilting and eventually died. The disease is prone to occur in the late and late stages of growth. Prevention: During composting, more cooked organic fertilizer is applied to enhance the resistance of plants; at the beginning of the disease, a disease point is poured with 5% lime milk, and the diseased area is sprayed with 50% tumefa 600 times for 1 to 2 times; Pull out in a timely manner, take out of the field, concentrated burned or buried.
Symptoms of Sclerotinia: Harm the stems and leaves. The leaf was initially immersed in a dark-brown lesion, and the entire leaf was rotted, leaving only the veins. When the stem was damaged, the cortex rotted and the stalks were disrupted. The mycelium was covered with hyphae. There were black murine sclerotia in the inside and outside of the stem and in the leaves. The sclerotia were the most common at the basal surface of the stem, and the whole plant withered and yellowed at the later stage. The disease is highly prone to drought and drought. Prevention: rotation at the time of sowing to reduce the spread of germs; pay attention to timely irrigation when the weather is dry, to be carried out in the morning or late evening; early onset of spraying with 50% thiophanate-methyl 800 times or 65% dexamethasone 600 times spraying the leaves , Every 5 days, even spray 3 to 4 times.
Fat sea has a mild diarrhea effect. Its mechanism is that the increase of intestinal contents after taking fat sea orally can produce mechanical stimulation, which results in the occurrence of diarrhea caused by the increase of reflex intestinal peristalsis. For anesthetized dogs, the intestinal peristalsis can be significantly increased by soaking fat sea overseas cortex, soft shell and kernels separately. This effect can be antagonized by atropine. Rabbit intestinal peristalsis in vitro was increased by the extract of benevolence, but the effect of outer skin and soft shell was not obvious.
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