Embryonic development of otiorhynchus sulcatus: effect of temperature and humidity
1979
MONTGOMERY, M.E. | NIELSEN, D.G.
Embryonic development of the black vine weevil was successful at temperatures between 12°-29°. Within this temperature range, vapor pressure saturation deficits of 5 and 7.5 mm Hg resulted in 50% and 100% mortality, respectively. The relationship between temperature (T) and days (Y) from egg deposition to eclosion was hyperbolic, Y = 93.26-6.54 T + 0.13T². High saturation deficits (D) slowed development 1 to 3 days, Y = 13.57 + 0.47D + 0.069D². No evidence was found that the weevils oviposit while in the plant canopy. Eggs were found only on or in the soil beneath plant litter, clods of dirt, and similar places where the soil was moist. These are the same areas where the weevil often rests during daylight. Eggs survived in the field and greenhouse only when covered by plant litter or soil.
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