| intra- and interspecific competition between biotypes b and q of bemisia tabaci (hemiptera: aleyrodidae) from spain. | biotypes b and q of bemisia tabaci (gennadius), collected from the islands of tenerife and majorca respectively, were exposed to competition conditions on tomato cv. marmande in the laboratory. both biotypes were established in single and mixed cultures at different densities. increased mortality of biotype q females and immature instars was observed together with a lower rate of fecundity and progeny size compared to biotype b, when reared in single or mixed cultures. the female:male sex ratio ... | 2004 | 15301702 |