[Market-farming] Prevention techniques for Late Blight

Road's End Farm organic87 at frontiernet.net
Tue Jun 30 12:29:36 EDT 2009


By not destroying infected plants, aren't you increasing the inoculum 
in the general area, thereby increasing the chances that other people's 
crops are going to get it?

-- Rivka; Finger Lakes NY, Zone 5 mostly
Fresh-market organic produce, small scale


On Jun 30, 2009, at 12:15 PM, Bill Shoemaker wrote:

>> Also, should a plant develop late blight, and it is caught early,
>> can the leaf be clipped off and the plant saved, or is it too risky ?
>
> There is no real liability in letting the plant survive while working 
> with it. If you're worried about other plants, they may be more 
> tolerant of it genetically. Plus, weather conditions which favor the 
> disease may change and put a halt to disease development. Removing 
> infected tissue is fine. Tomatoes can generate new tissue quickly. But 
> the organism which causes the disease is ubiquitous. You cannot 
> "sanitize" your way to a disease-free property. You can only institute 
> management techniques to minimize risk. And use fungicides if 
> acceptable.
>
> Bill
> William H Shoemaker, UI-NRES
> Sr Research Specialist, Food Crops
> St Charles Horticulture Research Center
> 535 Randall Road  St Charles, IL  60174
> 630-584-7254; FAX-584-4610
> _______________________________________________
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