Emamectin benzoate is a new and efficient semi-synthetic antibiotic pesticide synthesized from fermentation product avermectin B1, it has super-efficient, low toxicity (almost non-toxic formulation)
Emamectin benzoate is a new and efficient semi-synthetic antibiotic pesticide synthesized from fermentation product avermectin B1, it has super-efficient, low toxicity (almost non-toxic formulation), no residue, pollution-free pesticides and other biological characteristics, compared with avermectin, first, its insecticidal activity increased 1-3 orders of magnitude, with high activity to the larvae of Lepidoptera and many other insects and mites, both have stomach toxicity effect and contact action, has a good effect at very low doses (0.084-2g/ha), and no harm to beneficial insects in the process of pest control, it is beneficial for integrated pest control, in addition to expanding the insecticidal spectrum, reducing the toxicity to human and animal.
We know that the emamectin benzoate is an upgrade product of avermectin, and its activity is much higher than avermectin, such as its stomach poisoning toxicity is 2146 times of avermectin. Therefore, in general, the effect of emamectin benzoate is significantly better than abamectin, while controlling diamondback moth, emamectin benzoate is supposed to be better than avermectin. However, abamectin manufacturer has found a strange phenomenon in the production, that is, the effect of avermectin control diamondback moth is better than emamectin benzoate, what is the reason?
Here is involved an another important property of avermectin family, that is positive temperature coefficient. Simply, the insecticidal toxicity of avermectin family to insects was increased with (especially stomach toxicity) the temperature increased. However, the rate of emamectin and abamectin virulence increase with temperature increasing is inconsistent. At 16, the activity of the same content emamectin benzoate is 2-3 fold of avermectin, from 16 to 22, avermectin virulence (refer stomach toxicity) increased six times, the virulence of emamectin benzoate only increases 2-3 times, that is in about 22, the virulence of the same content (Note that the same content) avermectin and emamectin benzoate is actually comparable. But we know that the use of avermectin levels in the production are generally higher than emamectin benzoate (emamectin benzoate production is mostly 1% or 0.5%, while avermectin is generally 1.8% or 2%), the dilution factor is generally the emamectin benzoate higher than avermectin (avermectin 1000-1500 times, emamectin benzoate 2000-3000 times), it leads to the real use of avermectin effective content is much higher than emamectin benzoate, resulting in about 22, the effect of avermectin was seemed to be superior than emamectin benzoate. We know the most suitable temperature of diamondback is precisely about 22, that is in this temperature the moth will outbreak, so there will be appeared the situation that the effect of emamectin benzoate control diamondback moth is better than avermectin.
As the temperature rises, to above 25, the virulence of emamectin greatly increased, even can increase 1000-fold or more, and the virulence of avermectin was limited increased (several times to 10 times). So this time the advantage of emamectin benzoate actually get to play. Leaf borer incidence is generally 28-30 or more, so to prevent leaf borer, the effect of emamectin benzoate should be much better than avermectin. The occurrence of Spodoptera is generally in hot and dry day, it is in annual July-October period (summer), the effect of emamectin benzoate is better than avermectin.
Source:http://www.cospcn.com
The application of tungsten in various industries
Steel Industry Most of tungsten applied in the production of special steels. The widely used high-speed steel was containing 9-24% of tungsten, 3.8-4.6% of chromium, 1-5% of vanadium, 4-7% of cobalt, 0.7-1.5% of carbon.Magic effects of coconut oil
According to records, coconut oil can be regarded as the nobility of skin care plant extracts. It was rich in exotic tension of tropical plants, which can enhance the contractile force of the pores, perfectly beautify and nourish the skin.Exploring the Potentials of Nano-Aluminum Powder
Nano-aluminum powder, a material with remarkable properties due to its minuscule particle size, is revolutionizing various industries with its high reactivity and large specific surface area. Unlike its bulk counterpart, nano-aluminum powder begins to oxidize at a lower temperature of 550°C, compared to the 950°C oxidation point of ordinary aluminum. This lower ignition energy and full combustion without apparent cohesion make it a superior choice for applications requiring high energy and efficiency. The unique characteristics of nano-aluminum powder, such as faster burning rates and greater heat release, are largely influenced by its synthesis method, which determines its particle size, surface area, and shape.