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Effects of intra‐ and inter‐specific competition on fitness of sweetpotato weevil and W est I ndian sweetpotato weevil
Author(s) -
Kuriwada T.,
Kumano N.,
Shiromoto K.,
Haraguchi D.
Publication year - 2013
Publication title -
journal of applied entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.795
H-Index - 60
eISSN - 1439-0418
pISSN - 0931-2048
DOI - 10.1111/j.1439-0418.2012.01745.x
Subject(s) - weevil , biology , pest analysis , competition (biology) , convolvulaceae , ipomoea , fecundity , botany , subtropics , horticulture , curculionidae , agronomy , ecology , population , demography , sociology
The sweetpotato weevil C ylas formicarius ( F abricius) ( C oleoptera: B rentidae) and W est I ndian sweetpotato weevil E uscepes postfasciatus ( F airmaire) ( C oleoptera: C urculionidae) are major pests of sweet potato I pomoea batatas ( L .) L am., in tropical and subtropical regions. Effects of intra‐ and inter‐specific competition on the number of progeny (fecundity), body weight and developmental time of C . formicarius and E . postfasciatus were examined in single‐ and mixed‐species treatments under laboratory conditions. C ylas formicarius tended to outcompete E . postfasciatus , whereas E . postfasciatus rather than C . formicarius tolerated higher conspecific densities. We discuss the implications of the results for pest management and resource partitioning of pestiferous weevils.