The possible causes of the formation of aphid host biotypes were reviewed.

But the capacity of the aphids to use those host plants is different, some host biotypes were found in many countries or regions.

Especially for aphid and whitefly, it has been adopted to study host speciality, plant resistance and virus transmission.

A study on the biology and host specificity of Steneotarsonemus stipa;

arvense 65 species of representative plants which belong to 20 families were selected to test the host specificity of Trycophysa sp.

Understanding the insect s biology and host specificity is the first step in de.

Biology and host range tests of Cleonus piger,a natural enemy of Crisium arvense;

So we have studied the abiogenesis dynamic of the turtleback, biology and ecology, host-specificity, Feeding amount and control effect of Cassida japana Baly The main contents and conclusions are as follows:1.

Pre-oviposition and pre-feeding durations were analyzed using the survival analysis(failure-time analysis)method in host-specificity testing of weed biological control agent.

Many researches have confirmed that there are various host biotypes in wild populations of the cotton aphid, but the capacity of the biotypes to survive on other host plants differed between them.