nano ema (nano emamectin)
Appearance：light yellow powder
Melting point： 144-147 ℃
Solubility：soluble in acetone and methanol；slightly soluble in water；insoluble in hexane
Toxicity：acute oral toxicity test， LD50＞500mg/kg， Low toxicity
One of the synthetic method of nano ema (nano emamectin)
a kind of preparation method of nano ema (nano emamectin), it is related to technical field of pesticide.Comprise the following steps：The carbonyl
Avermectin B2 (III) of 4 " table 4 " carbonyl 5 is in solvent acetic acid isopropyl ester, 20 45 DEG C, under catalyst A catalysis, imidization is carried out
with aminating agent heptamethyldisilazane, compound shown in formula (IV) is obtained；imidization is finished, and adds 95% ethanol, below 05 DEG C, in the
presence of go back original reagent sodium borohydride and catalyst B, is carried out reduction reaction, is obtained compound shown in formula (V)； with
benzoic acid salt-forming reaction occurs for compound shown in formula (V), obtains emamectin benzoate B2 benzoates (I).The inventive method reaction condition
is gentle and high income, it is easy to carry out industrialized production.
Application of nano ema (nano emamectin benzoate)
Mode of action Non-systemic insecticide which penetrates leaf tissues by translaminar movement. Paralyses the lepidoptera, which
stop feeding within hours of ingestion, and die 2-4 dat. Uses For control of Lepidoptera on vegetables, brassicas and cotton, at up to 16 g/ha, and in pine
trees, at 5-25 g/ha.
Mechanism of action：
It can affect insect feeding by insect neurotransmission（ enchances the role of neurotransmitters such as glutamate and gamma-aminobutyric acid），so that a
Large amount of chloride ions enter the nerve cells, cause cell function loss and disrupt nerve conduction.Causes irreversible paralysis of insects and
Mode of action:
Stomach and contact ,no systemic activity, and it has a strong permeability to the leaves.
Target and dosage of nano ema (nano emamectin)
It has good effect on Lepidoptera； diptera and thrips. The main target is noctuidae，resistance diamond back moth， Pyralidae，caterpillar，especially thrips.
Stable for 2 years after receipt of order if stored under recommended conditions.
After 2 years, the compound should be re-analyzed for chemical purity before use