Re: aphids on tomatoes


----- Original Message ----- From: "Richard Dufresne" <salvia1@earthlink.net>
To: <MEDIT-PLANTS@ucdavis.edu>
Sent: Saturday, September 24, 2005 6:37 AM
Subject: re: aphids on tomatoes


At 09:35 AM 9/23/2005 -0700, you wrote:

Moira, thanks for yet another informative post in response to my
aphids-on-tomato problem as the plants decline at the end of the summer.


Phosphorus deficiency is supposed to be a cause of whitefly infestation on
tomato plants.
Hi Richard
I think my climate here is a bit cool most years to encourage outdoor whitefly, though it is a real pain some years in my glasshouse.

In general though, any sort of stress that is likely to upset a plant's metabolism may render it liable to pest attack and any nutrient deficiency, especially one as major as phosphorus certainly comes in this category.

Moira
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