The preparation method of the water dispersible granules of 80% nicosulfuron was introduced.

With the starting material of 2-chloropyridine-3-carboxylic acid, nicosulfuron was synthesized by seven steps including amidization, esterification, condensation and so on.

This paper reported the weed control efficiency ofnicosulfuron and its mixture With other herbicides in maizefields of the North of Jiangsu province.

The main species Cunsanpi of yellow sun-cured tobacco in Hunan had been practiced on changes and effects of curing methods on tobacco qualities from 2002 to 2003.

Field experiments were conducted during 2004-2005 to study the effects of different amount and methods of nitrogen on nutrents change in the soil, biological characteristic, accumulation of the dry matter, nitrogen, phosphorus and potassium, physiological characteristic, carbon and nitrogen metabolite of cutters and upper-leaf, yield and quality of the yellow sun-cured tobacco of Ningxiang.

The results showed the leaf surface extractant of rustic tobacco had significant attraction effect to tobacco badworm on ovipositill and the .

The number of eggs on rustic tobacco overtop that on nicotiana tobacco markedly in field,in order to discover the reason, leaf volatiles and leave surface extract of nicotiana tobacco and rustic tobacco were extracted by steam distillation and drip-rinsing process respectively, and the attraction effect of extractant to oriental tobacco budworm and cotton bollworm on oviposition were analyzed.

In order to research appropriate fermentation methods on sun-cured yellow tobacco in Ningxiang Hunan, artificial fermentations and aging were designed on two grades of tobaccos (B2 and C3) in this experiment.

To improve the smoke concentration,strength and satisfaction of low-grade Virginian-type cigarette,the sun-cured yellow tobacco was added at the ratio of 2%,4%,6%,8% in the group of cigarette formula,and the physical,chemical character were compared,the sensory quality was evaluated,the smoking was analyzed.