There are hundreds of species of pests in pear trees, of which about 20 are serious pests, and the most severe is the damage of P. edulis (also known as China's P. cinnamomea). Because farmers are more difficult to grasp the timing of P. crassifolia, they often miss the most. Good timing of prevention and control brought certain difficulties to the prevention and treatment of pear hibiscus. Right now, it is the critical period for the prevention and control of pear hibiscus in the northern regions.
Morphological characteristics: adults are divided into winter and summer type, body length 2.3 ~ 3.2 mm, winter type adults larger body, gray brown or dark dark green, compound eye red. Adult thoracodorsalis have four red-yellow (winter) or yellow (summer) longitudinal stripes. Winter wings are transparent, brown veins, summer wings slightly yellow color, veins light yellow-brown. At rest, the wings are ridged and stacked on the body. The eggs are oblong, yellowish white at the beginning and yellow at the beginning. The newly hatched nymphs are oval in shape and pale yellow in color. They appear flat round and dark brown after the third year of age. The wing buds are significantly enlarged and their body is flat and round, protruding from both sides of the body. Body back brown, which has the same red and green markings.
Occurrence pattern: In the south-central part of Hebei Province, 6~7 generations occur in one year; in the northeastern region and northern Hebei Province, it takes 3~5 generations a year; in Shandong it takes 4~6 generations a year; in Zhejiang, there are 5 generations in a year, and the generations overlap. In the middle and southern part of Hebei Province, in the middle of March, it is a period of high yield. The pears spawn before the buds sprout in the buds of branches and leaves, germinate during the spawning of young tissue hairs; the first generation of nymphs is more concentrated, more nymphs Cluster hazards, this period is the first critical period for the prevention and control of pear hibiscus. Over the following generations, generations overlap severely, and they have the habit of secreting mucus. They live and eat in the mucus and aggravate the difficulty of prevention and treatment. The first generation of nymphs occurred in the period from late April to early May. The occurrence and infestation of the northern pear region took place from May to July. The second generation of adults emerged from the early June to the middle of July; The emergence period of adults appeared from early July to late August; the fourth generation of adults appeared in the early August; the fifth generation of adults emerged in the middle and late September, all overwintering types.
1. Agricultural control measures combined with autumn basal fertilization or winter irrigation before going through the winter to thoroughly clean up dead branches, fallen leaves and all kinds of weeds in the park; in winter, winter winter water can be used to freeze some of the overwintering adults; combined with the prevention of trunk diseases, scraping before budding This kind of old bark bark lowers the base number of overwintering insects, so as to reduce the medication pressure during the growth period.
2. Biological control measures Protect and use natural enemies. The natural enemy insects with better control of P. edulis were the two parasitoids, P. edulis and P. gracilis. Caoling, ladybug and florets also had certain control effects on P. cinnamomea. Through the use of sex trapping, sweet and sour trapping, and sticking of branches and sticks in the late April to June of the spawning of the two skipping bees to prevent and treat the fruitworms and acarids, spraying can be avoided to protect the wasp; In September, parasitized nymphs of P. striata can be collected and stored in a cryogenic box, and released in early April of the following year.
3. Chemical prevention and control measures Chemicals prevention and control focused on the wintering adult pupa (mid-March) and the first generation nymph hatching (late April to early May) spraying. Can choose 25% Aketai 5000~6000 times liquid, or 10% imidacloprid wettable powder 1500~2000 times liquid, 5% acetamiprid soluble powder 2500~3000 times liquid, 52.25% farmland oil 1500~2000 times liquid , Each time the drug can be added 6000 times the liquid natural alfalfa - Shuonfeng 481, spray add ä¸°ä¸°481, can improve efficacy, reduce the pollution of pesticides on the fruit surface, improve fruit quality.
For the treatment :
[Of all the diseases of the nervous system, the most common difficulty that people have is pain, and much of that is nerve-related," according to Dr. Shai Gozani, founder and CEO of NeuroMetrix, a medical device company. [There are 100 million people who live with chronic pain."
According to the Mayo Clinic, patients with nerve disorders experience functional difficulties, which result in conditions such as:
Epilepsy, in which abnormal electrical discharges from brain cells cause seizures
Parkinson's disease, which is a progressive nerve disease that affects movement
Multiple sclerosis (MS), in which the protective lining of the nerves is attacked by the body`s immune system
Amyotrophic lateral sclerosis (ALS), also known as Lou Gehrig's disease, is a motor neuron disease which weakens the muscles and progressively hampers physical function
Huntington's disease, which is an inherited condition that cause the nerve cells in the brain to degenerate
Alzheimer's disease, which covers a wide range of disorders that impacts mental functions, particularly memory.
Mayo Clinic also noted that the nervous system can also be affected by vascular disorders such as:
Stroke, which occurs when there is bleeding on the brain or the blow flow to the brain is obstructed;
Transient ischemic attack (TIA), which are mini-type strokes that last a shorter period of time but mimic stroke symptoms; and
Subarachnoid hemorrhage, which is specifically bleeding in the space between your brain and the surrounding membrane that can be the result of a trauma or rupturing of a weak blood vessel;
Infections such as meningitis, encephalitis, polio, and epidural abscess can also affect the nervous system, the NIH noted.
Treatments vary from anti inflammatory medications and pain medications such as opiates , to implanted nerve stimulators and wearable devices, Gozani said. [Many people also turn to herbal and holistic methods to reduce pain, such as acupuncture."
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