The Effect of Mercury Vapour on the Eggs of Calandra granaria (L.) (Col., Curculionidae)
- 1 September 1946
- journal article
- research article
- Published by Cambridge University Press (CUP) in Bulletin of Entomological Research
- Vol. 36 (3), 283-290
- https://doi.org/10.1017/s0007485300033186
Abstract
1. To determine the percentage hatch of Calandra granaria eggs, the grain containing them should be kept for 6–10 days at 25°C. after a two-day oviposition period.2. Pretreatment of grain with mercury vapour makes no difference to the fertility of eggs afterwards laid in it.3. At 25°C. 99 per cent. of the eggs are sterilised in 24 hours and 87 per cent. in 8 hours, using what probably approaches the saturated vapour.4. At 10°C., the sterilisation for periods of 24, 48, and 72 hours is 44, 87 and 93 per cent. respectively.5. At 25°C., mercury vapour will penetrate at least 30 cm. of grain in 2 days. At 12°C., mercury vapour will penetrate at least 90 cm. of grain in 7 days.Keywords
This publication has 1 reference indexed in Scilit:
- Mercury as a Control for Stored Grain PestsBulletin of Entomological Research, 1944