How to distinguish between vegetable diseases and deficiency diseases

Vegetable diseases mainly include fungi, viruses and bacterial diseases. Deficiency disease, also known as physiological disease, is the specific symptom that vegetable crops lack certain nutrients. Sometimes disease and deficiency traits are very similar in appearance, especially in the early stage of disease, which brings certain difficulties to disease prevention and control. In this case, the distinction can be made from the following three aspects.

First, look at the development of the disease. Vegetable diseases are contagious. Therefore, the occurrence of disease generally has a clear center of disease, and then quickly spread to the surrounding, usually into a film, if not timely control, can cause great damage to the growth of vegetables. The lack of disease is generally not the center of disease, to disseminate as much, if you do not take remedial measures, will seriously affect the yield and quality.

Second, see the relationship between illness and soil. Vegetable diseases are not particularly related to soil types and characteristics. No matter what kind of soil type, if there is a source of disease, it can occur in the field of high nitrogen fertilizer application without paying attention to the combination of phosphorus and potassium fertilizers. The occurrence of crop deficiencies is closely related to soil types and characteristics. For example, the high soil pH in the north is not easy to lack molybdenum, while the acidic soil in the south is easy to lack such elements. The plants are characterized by poor growth, short stature, whip-tailed leaves, cup-shaped leaves or yellow-leafed leaves. For some soils with different nutrient levels, some or some of the deficiency diseases can occur, while infertile soils occur frequently.

Third, see the relationship between illness and the weather. Vegetable diseases generally occur frequently on cloudy days and in high humidity weather or re-emerged, and it is more likely to occur when plant groups are covered by dew. Should pay attention to observe the weather and the growing condition of the plant population, early prevention and treatment. The lack of disease has little to do with the above-ground air humidity. However, long-term water retention or drought in the soil can contribute to some of the deficiency. For example, long-term water retention in plants can lead to potassium deficiency, which is characterized by leaf scorch from bottom to top, like a fire pot. Unstable soil moisture, high and low, easily lead to calcium deficiency, leading to physiological diseases such as umbilical rot, heart rot, pseudo-black spot disease, celery stalk disease, but also affect the flower buds of fruits and vegetables in varying degrees. Differentiation.

Trolley Ultrasound Series

C200 Trolley Color Doppler Ultrasound System

Feature:

·High definition clear image

·15inch touch Screen LED Screen

·Built-in Battery

·3D/4D imaging(option)

·Support phased array probe(option)

·Abundant functions, Multilingual

·Hardisk, USB storage

·Generous and exquisite appearance

Specifications:


1. Imaging Modes:

lB, B|B, 4B, B|M, M

lColor Doppler (CFM)

lPower Doppler (PDI)

lDirectional Power Doppler (DPDI)

lPulsed Wave Doppler (PWD)

lB+PWD (Duplex)

lB+CFM/PDI/DPDI+PWD (Triplex)

lHigh Pulse Repetition Frequency (HPRF)

lTissue Harmonic Imaging (THI)


SS-100 Touch Screen Trolley Ultrasound Diagnosis B Scanner

Feature:

-Full digital imaging technology

-Crystal-clear Image

-Computer platforms, Abundant functions

-Powerful image and report management

-3D Image Function(optional)

-DICOM display and transfer

-250G large Storage volume

-Broadband Multi-frequency probes

-Compatible with USB laser/inkjet printers

-Pretty and new appearance

-15 inch touch screen color LCD monitor

-Silica gel backlight waterproof keyboard

-8 segment TGC, 16 step zoom

-Complete application software packages

-Can work with external battery(option)

-2 probe connector

-Can be fold, the transportation is convenient and lower freight

-Multiple language: English, French, German, Spanish, Russian, Italian, Portuguese, etc.


Specification:

-D-Maximum Scanning Depth: max.250mm

-Multi-frequency: 5 segment frequencies

-Zoom: 10 ratio, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0

-Image gray scale: 256 level gray scale

-Cine Loop: max.1024 frames

-Scanning mode: B, 2B, B/M, M, 4B, 9B, ZOOM;

Real-time Zoom on B mode

-Image processing: Pre-processing, after-processing, dynamic range, frame rate, line average, edge;

enhancement, Black/White inversion; Gray scale adjustment, contrast, brightness, γ revision.

-Gain: gain: adjustable between 0-100dB;

Time gain control(TGC): 8 segment adjustment, B, M adjustment separately.

-Monitor: 15 inch touch screen color LCD monitor

-Supported output apparatus: U-Disk, Laser/ink printer, video printer, VGA

-Measurement and calculation(human):

B mode: distance, circumstance, area, volume, angle, ratio, stenosis, profile, histogram;

M mode: heart rate, time, distance, slope and stenosis;

Gynecology measurement: Uterus, cervix, endometrium, L/R ovary;

Obstetric: gestation age, fetal weight, AFI;

Cardiology: LV, LV function, LVPW, RVAWT;

Urology: transition zone volume, bladder volume, RUV, prostate, kidney;

Small parts: optic, thyroid, jaw and face.

-Measurement and calculation(veterinary):

Cattle: BPD, CRL, TD; Horse: GA; Dog: GS; Cat: HD, BD;

Sheep: BPD, CRL, TD

-Image store: by 250G hardisk or USB disk

-Print: by USB laser/inkjet printers

-DICOM3.0, medical digital imaging and communication

-Probe Connector: 2

-Weight: Around 28kg

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Guangzhou Sonostar Technologies Co., Limited , https://www.sonoeye.com