How long can brood survive outside the hive?

[Finman]

I think but not reading that the 24 hours mentioned in that report was after pupation/capping.

Wrong quess
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[ugcheleuce]

If you care to look back at the thread you will find the OP referring to '24 hours' in your link.

That is because the English used in that report is non-native English, with sufficient grammar errors to make it unclear what is meant (e.g. in some sentences I can't figure out if they refer to a past even or a future event because the present tense is used but clearly the meaning is not "present").

Note that the "report" isn't really a report but is a PowerPoint presentation, so presumably much of the relevant information was given by the speaker, which is why it is difficult to figure out from just the slides what is meant. Some crucial information is not given at the start of the report, for example how long the brood was chilled (only somewhere in the middle is it mentioned). My initial interpretation was that the brood was chilled for 24 hours, but no, the brood was kept at low temperatures for about 6 days.

I think but not reading that the 24 hours mentioned in that report was after pupation/capping.

No, that is not so (and that is why one must read the report before guessing what it says).

The study examined the effects of chilling if the brood is chilled 24 hours before capping, 24 hours after capping, 48 hours after capping and 72 hours after capping. The study also compared the difference between shock-chilling the brood to 18 degrees quickly before maintaining it at the examined temperatures of 25 degrees, 30 degrees and 35 degrees for 6 days, and the same but without shock-chilling.

The question of the report was to what extend a cold spell is responsible or co-responsible for chalk brood (the brood was deliberately infected).

 

[Finman]

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Thanks to heaven that I did not have internet when I started beekeeping 52 years ago.
Everything is so complicated nowadays.

 

[ugcheleuce]

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Thanks to heaven that I did not have internet when I started beekeeping 52 years ago.

Yes, but 52 years ago a standard hive had only three castes (queen, worker, drone). Now there are four (queen, worker, drone, mite).

 

[Finman]

Yes, but 52 years ago a standard hive had only three castes (queen, worker, drone). Now there are four (queen, worker, drone, mite).

That is very true. But mite is easier to nurse than Native Black Bee was. Even taking one frame from hive was bigger happening than life itself. You soon found more bees on your throusers than on a frame...Shake bees...
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