Knockdown resistance (kdr) is used to describe resistance to DDT and pyrethroid insecticides that result from reduced sensitivity of the nervous system in insects and other arthropods.

Study on the Population Quality and Lodging Resistance of Hybrid Rice Jinyou527 in the High and Low Altitude Regions;

Based on theoretical analysis and physical simulated tests, the result showed that rice panicle typeaffected lodging resistance by bending moment (moment of making straw curved) and barycenter, the lodgingresistance decreased with the bending moment increaseing or barycenter lifting.

The difference of lodging resistance for nine japonica rice varieties from northern China with different panicle types was studied.

Evaluation of lodging resistance and relation and path analysis of lodging resistance traits in wheat;

The pot experiment was adopted to study the effectsof silicon fertilizer on yield,quality and lodging resistance of waxy corn.

Results indicated that: Lodging resistance, expressed by the tilt angle of matured plant, was significantly negatively correlated with the length of the first internode, and positively correlated with the area and thickness at the base of stalk.

Gene effects and heterosis of lodging resistance traits in wheat were studied syculmatically by Hayman diallel analysis methods.