Effects of snowdrop lectin on Mexican rice borer (Lepidoptera: Pyralidae) life history parameters.
The effects of the snowdrop lectin, Galanthus nivalis agglutinin (GNA), delivered through an artificial diet, on growth, development, and life history parameters of the Mexican rice borer, Eoreuma loftini (Dyar), were evaluated in the laboratory. Incorporation of GNA at three treatment levels, 0.5, 1.0, and 2.0% of total dietary protein, in the larval diet significantly decreased larval survivorship and percentage of adults emerging relative to a control diet lacking GNA, whereas differences were not observed among the three treatment levels. Both larvae and pupae in the control were 8-25% larger than those in the GNA treatments, but differences were not observed between larvae in the GNA treatments. Furthermore, presence of GNA did not affect larval and pupal developmental periods, longevities, and fecundities compared with the control. Mexican rice borer life history parameters, such as net reproductive rate and intrinsic rate of increase, were substantially reduced by the presence of GNA in the diet, but differences were not evident among the three GNA treatment levels.
Sétamou
M
M
Biological Control Laboratory, Texas A&M University, College Station, TX 77843-2475, USA.
Bernal
J S
JS
Mirkov
T E
TE
Legaspi
J C
JC
D000818:Animals; D004032:Diet; D004305:Dose-Response Relationship, Drug; D005260:Female; D007814:Larva / Q000187:drug effects / Q000254:growth & development; D007915:Lepidoptera / Q000187:drug effects* / Q000254:growth & development / Q000502:physiology*; D008018:Life Cycle Stages / Q000187:drug effects*; D008297:Male; D037241:Mannose-Binding Lectins / Q000008:administration & dosage* / Q000494:pharmacology*; D037121:Plant Lectins / Q000008:administration & dosage* / Q000494:pharmacology*; D011679:Pupa / Q000187:drug effects / Q000254:growth & development; D012744:Sex Ratio; D015996:Survival Rate
D037241:Mannose-Binding Lectins; D037121:Plant Lectins; C063117:snowdrop lectin