How do trees know it's fall?

[rgw]

In article <fmP_1.15906$_e3.2511972 at news2.randori.com>,  wrote:
> The process by which deciduous trees lose their leaves is mainly due to the
> reduction in daylight

The length of it, that is. The shortening of the days acts as the trigger.

Regards,

Roger
 
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Roger Whitehead,
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