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Effects of soybean proteinase inhibitor on development, survival and reproductive potential of the sugarcane borer, Diatraea saccharalis
Author(s) -
Pompermayer P.,
Lopes A.R.,
Terra W.R.,
Parra J.R.P.,
Falco M.C.,
SilvaFilho M.C.
Publication year - 2001
Publication title -
entomologia experimentalis et applicata
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.765
H-Index - 83
eISSN - 1570-7458
pISSN - 0013-8703
DOI - 10.1046/j.1570-7458.2001.00804.x
Subject(s) - diatraea saccharalis , biology , crambidae , fecundity , pest analysis , lepidoptera genitalia , larva , population , pyralidae , botany , agronomy , toxicology , demography , sociology
One approach that can be employed in integrated pest management is the use of proteins with antinutritional effects on insect metabolism and development. The antimetabolic properties of soybean proteinase inhibitor (SPI) on growth of neonate larvae of the sugarcane borer, Diatraea saccharalis (Fabricius, 1794) (Lepidoptera: Crambidae) have been evaluated. When incorporated into an artificial diet at 0.5% (w/w), SPI retarded growth rate and development of larvae when compared with larvae fed on artificial diet alone. However, larval survival was not significantly affected. The purpose of our research was to calculate demographic statistics for the sugarcane borer reared on diet either with or without semi‐purified extract of SPI. Net reproductive rate ( R 0 ), instantaneous rate of increase ( r m ), combined age‐specific survivorship ( l x ) and age specific fecundity ( m x ) provide information about population growth potential. These parameters were measured in order to determine the effects of the proteinase inhibitor on the insect's population dynamics. The observed differences would potentially translate into large reductions in population growth, indicating a potential value of using SPI for protecting sugarcane plants against damage by the sugarcane borer.