Under constant temperature conditions in the range of 17 -31℃ ,the development rate of black rice stem fly Hydrellia sasakii increased with the temperature as logistic curve,while the survivals of larvae and pupae,fecundity of adults and population trend index increased with temperature as parabola.

There are seven generations of black rice stem fly Hydrellia sasakii Yuasa et Ishitani yearly in Jiangxi Province.

The life parameters of Hydrellia sasakii on rice at 4 growth stage (seedling, tillering, booting, heading) were studied in 1994-1995.

Occurrence and Control of Hydrellia chinensis on Wheat and Barley in Ge-ermu Area;

Studies on rice yield loss caused by Ephydra macellaria Egger;

The rice ephydrid( Ephydra macellaria Egger) has become one of the most injurious insects of rice in the eastern region of Inner Mongolia since late 1990 s.

We compare the minute structures of several different kinds of rice stem and analyze the relationship between its minute structure and mechanical property.

In order to evaluate the differences of rice-stem lodging resistance between controlled irrigation and regular irrigation,and seek irrigation treatment which was beneficial to rice stem lodging resistance,rice-stem was taken as the research object,and the performance of rice-stem lodging resistance was studied under different irrigation treatments.