The scientific name is Aristobia testudo (Voet), Phthalididae. Distribution of Guangdong, Guangxi, Fujian, Yunnan, Shaanxi and other provinces.

The host's longan, litchi, cherimoya, plum, sapindaceae and so on.

The larvae are characterized by bored trunks.

Morphological characteristics The adult body is 20-35mm long, with black and tiger-skinned fluffy markings on the back of the body. The head, antennae l, 2 nodes, ventral surface and foot are sparsely black hairs; Each of the elytra wings has more than a dozen black stripes that form a tortoiseshell plaque. Eggs are long oval, white or yellow. The last-instar larvae have a body length of about 60 mm, a flat cylindrical shape, and milky white. All are sparsely long hairs, the thoracodorsal plate is tan-brown, with obvious lateral sulcus, with white longitudinal stripes in the center, dark yellow-brown in the leading edge, and dark brown “mountain” shaped shield-like bulges in the second half, both sides of the bulge. Each has 1 spot. Bare pods are milky white and black when they are feathered. (right)

Living habits Guangdong, Guangxi, a generation old, larvae in the longan, litchi and other branches in the winter. From the beginning of June to the end of November, adults can be seen in the fields, with the most from July to September. After adult emergence, the young shoots of litchi, longan, and grape are first fed and the young shoots die. Many eggs are produced under the cortex of branches or branches. The newly hatched larvae first feed under the bark, and then gradually dipped into the xylem of the branches to form a flat round longitudinal tunnel. Larvae are harmed from the top down. The mature larvae use the secretions and feces to cover both ends in the spacious room of the ramp for debridement.

Control methods (1) Remove pests in time and kill adults. A knife can also be used to remove eggs and newly hatched larvae from the bark spawning sites. Use small wire to kill larvae. (2) In July of adult emergence fecundity and before spawning, use its sudden death to suddenly shake the branches to allow them to fall to the ground to catch the adults. (3) After the larvae enter the xylem, visible fresh excrement of feces, timely inspection of the mouth of the fistula, infusion of dichlorvos emulsifiable concentrate 5 to l0 times liquid, then use cotton or clay to seal the hole, can also be used 40% of the small cotton swab Dimethoate or 50% dichlorvos embossed into the tunnel, the hole is blocked with yellow earth, can poison the hole larvae.

Ventilator block diagram
One. Main mechanical ventilation modes
(1) Intermittent Positive Pressure Ventilation (IPPV): positive pressure in the inspiratory phase and zero pressure in the expiratory phase. 1. Working principle: The ventilator generates positive pressure in the inspiratory phase and presses the gas into the lungs. After the pressure rises to a certain level or the inhaled volume reaches a certain level, the ventilator stops supplying air, the exhalation valve opens, and the patient's thorax Passive collapse of the lungs and exhalation. 2. Clinical application: Various patients with respiratory failure mainly based on ventilation function, such as COPD.
(2) Intermittent positive and negative pressure ventilation (IPNPV): the inspiratory phase is positive pressure and the expiratory phase is negative pressure. 1. How it works: The ventilator works both in the inspiratory and exhaled phases. 2. Clinical application: Expiratory negative pressure can cause alveolar collapse and cause iatrogenic atelectasis.
(3) Continuous positive pressure airway ventilation (CPAP): Refers to the patient's spontaneous breathing and artificial positive airway pressure during the entire respiratory cycle. 1. Working principle: Inspiratory phase gives continuous positive pressure air flow, and exhalation phase also gives a certain resistance, so that the airway pressure of inhalation and exhalation phases are higher than atmospheric pressure. 2. Advantages: The continuous positive pressure airflow during inhalation is greater than the inspiratory airflow, which saves the patient's inhalation effort, increases FRC, and prevents the collapse of the airway and alveoli. Can be used for exercise before going offline. 3. Disadvantages: great interference to circulation, large pressure injury of lung tissue.
(4) Intermittent command ventilation and synchronized intermittent command ventilation (IMV / SIMV) IMV: There is no synchronization device, the ventilator air supply does not require the patient's spontaneous breathing trigger, and the time of each air supply in the breathing cycle is not constant. 2. SIMV: There is a synchronization device. The ventilator gives the patient a commanded breath according to the pre-designed breathing parameters every minute. The patient can breathe spontaneously without being affected by the ventilator. 3. Advantages: It exerts its ability to regulate breathing while offline; it has less influence on circulation and lungs than IPPV; it reduces the use of shock medicine to a certain extent. 4. Application: It is generally considered to be used when off-line. When R <5 times / min, it still maintains a good oxygenation state. You can consider off-line. Generally, PSV is added to avoid respiratory muscle fatigue.
(5) Mandatory ventilation per minute (MMV) When spontaneous breathing> preset minute ventilation, the ventilator does not command ventilation, but only provides a continuous positive pressure. 2. When spontaneous breathing is less than the preset minute ventilation volume, the ventilator performs command ventilation to increase the minute ventilation volume to reach the preset level.
(6) Pressure Support Ventilation (PSV) Definition: Under the prerequisite of spontaneous breathing, each inhalation receives a certain level of pressure support, increasing the patient's inhalation depth and inhalation volume. 2. How it works: The inspiratory pressure begins with the patient's inspiratory action, and ends when the inspiratory flow rate decreases to a certain level or the patient attempts to exhale hard. Compared with IPPV, the pressure it supports is constant, and it is adjusted by the feedback of the inspiratory flow rate. Compared with SIMV, it can get pressure support for each inhalation, but the level of support can be set according to different needs. 3. Application: SIMV + PSV: used for preparation before off-line, can reduce breathing work and oxygen consumption Indications: Exercise the ventilator; prepare before going offline; the ventilator is weak due to various reasons; severe flail chest causes abnormal breathing. 5. Note: Generally not used alone, it will produce insufficient or excessive ventilation.
(7) Volume Supported Ventilation (VSV): Each breath is triggered by the patient's spontaneous breathing. The patient can also breathe without any support and can reach the expected TV and MV levels. The ventilator will allow the patient to be truly autonomous Breathing also applies to preparations before going offline.
(8) Capacity control of pressure regulation
(IX) Biphasic or bilevel positive pressure ventilation How it works: P1 is equivalent to inspiratory pressure, P2 is equivalent to breathing pressure, T1 is equivalent to inspiratory time, and T2 is equivalent to exhalation time. 2. Clinical application: (1) When P1 = inspiratory pressure, T1 = inspiratory time, P2 = 0 or PEEP, T2 = expiratory time, which is equivalent to IPPV. (2) When P1 = PEEP, T1 = infinity, P2 = 0, T2 = O, which is equivalent to CPAP. (3) When P1 = inspiratory pressure, T1 = inspiratory time, P2-0 or PEEP, T2 = desired controlled inhalation cycle, equivalent to SIMV.

Medical Positive Pressure Breathing Machine

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