The greenhouse tomato poisoning and virus disease to distinguish

First, the symptoms: tomato hormone poisoning often manifested as upward curled leaf stiffness, texture (vein veins) thicker, damp, progressive. However, the symptoms of tomato virus disease are not progressive, manifested immediately after the onset of disease, and the leaves curled like needles. Tomato hormonal poisoning is often manifested in the greenhouse as a weak plant leaf curl, more flowers, the more curling. Tomato virus disease does not show the more curled and heavier symptoms. Tomato hormonal intoxication leaves the leaves unchanged or become greener when the leaves shrink and curl. Tomato virus disease, on the other hand, showed symptoms of yellowish color in the leaves. The sooner tomato is planted, the higher the temperature is, and the more likely it is that hormonal poisoning will occur. The vegetable growers often prevent leggy, and they use chlormequat, auxin, and dwarfing at the seedling stage. Many hormones accumulate in the plants, although they are not Performance, once you spend, the symptoms appear immediately. Second, control methods: Hormone poisoning with Kang Fengsu 5 ml water 12.5 kg sprayed. Every 4 days, spray with the same concentration of drug solution once again, or use Life One to follow the instructions. In the later period of hormone poisoning, spray 2.5 to 7 ml of 2,4-d to 12.5 kilograms of water, spray once every 5 to 6 days, spray 3 to 4 times, or spray it with Life One.

Everything You Need To Know About LED Lighting

LEDs are a simple invention with huge potential to change the lighting industry for the better. Don`t know much about them? Here are three big things you need to know to get your feet under you:
1.What Does LED Stand For?

2.LED stands for light-emitting diode.

A diode is an electrical device or component with two electrodes (an anode and a cathode) through which electricity flows - characteristically in only one direction (in through the anode and out through the cathode). Diodes are generally made from semi-conductive materials such as silicon or selenium - substances that conduct electricity in some circumstances and not in others (e.g. at certain voltages, current levels, or light intensities).

1.What is LED Lighting?
2.A light-emitting diode is a semiconductor device that emits visible light when an electrical current passes through it. It is essentially the opposite of a photo-voltaic cell (a device that converts visible light into electrical current).
Did You Know? There is a similar device to an LED called an IRED (Infrared Emitting Diode). Instead of visible light, IRED devices emit IR energy when electrical current is run through them.

1.How Do LED Lights Work?

2.It`s really simple actually, and very cheap to produce, which is why there was so much excitement when LED lights were first invented!

The Technical Details: LED lights are composed of two types of semiconducting material (a p-type and an n-type). Both the p-type and n-type materials, also called extringent materials, have been doped (dipped into a substance called a [doping agent") so as to slightly alter their electrical properties from their pure, unaltered, or [intrinsic" form (i-type).
The p-type and n-type materials are created by introducing the original material to atoms of another element. These new atoms replace some of the previously existing atoms and in so doing, alter the physical and chemical structure. The p-type materials are created using elements (such as boron) that have less valence electrons than the intrinsic material (oftentimes silicon). The n-type materials are created using elements (such as phosphorus) that have more valence electrons that the intrinsic material (oftentimes silicon). The net effect is the creation of a p-n junction with interesting and useful properties for electronic applications. What those properties are exactly depends mostly on the external voltage applied to the circuit (if any) and the direction of current (i.e. which side, the p-type or the n-type, is connected to the positive terminal and which is connected to the negative terminal).
Application of the Technical Details to LED Lighting:

When a light-emitting diode (LED) has a voltage source connected with the positive side on the anode and the negative side on the cathode, current will flow (and light will be emitted, a condition known as forward bias). If the positive and negative ends of the voltage source were inversely connected (positive to the cathode and negative to the anode), current would not flow (a condition known as reverse bias). Forward bias allows current to flow through the LED and in so doing, emits light. Reverse bias prevents current from flowing through the LED (at least up until a certain point where it is unable to keep the current at bay - known as the peak inverse voltage - a point that if reached, will irreversibly damage the device).

While all of this might sound incredibly technical, the important takeaway for consumers is that LEDs have changed the lighting landscape for the better, and the practical applications of this technology are almost limitless. To learn about why LEDs might be a good fit for your business.

LED Lighting

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