The Research on Biological Characteristics of Cochineal (Dactylopius coccus Costa) Radiated by 60Co-γ Ray Exploration of Adaptability of Cochineal(Dactylopius confusus) Based on Life Tables Study on Experimental Population of Cochineal Insect(D.confusus(Cockerell)) The Present Research and Utilization Situation of Cochineal Insects in the World Feeding Effect of Different Sucrose Levels on Cochineal (Dactylopius coccus) Study on the Relationship between Cochineal and Cacti