GENTECH archive


Re: Reply to KRRS & Monsanto, archives 448, 461, 462

Dear Clive: 

In my personal experience and from the data of many others, for the
species of bollworms that is a problem in India, the Bt cotton plants
don't kill all of the bollworms that feed on the cotton plant.  In that
sense, the Bt cotton plants are only partially effective.  However,
even without killing all of the bollworm larvae, the plants can yield
well and greatly reduce insecticide needs. 

For some other species of bollworms (as in the US and Mexico), the Bt
cotton is very effective.


<excerpt>Dear Rick

why, in your opinion, is GE Bt "only partially effective"?

Clive Elwell


<bold><fontfamily><param>Arial</param>-----Original Message-----

From: </fontfamily></bold><fontfamily><param>Arial</param>Rick Roush

<bold>To: </bold><<<<>>

<bold>Date: </bold>Thursday, 3 December 1998 16:09

<bold>Subject: </bold>Reply to KRRS & Monsanto, archives 448, 461, 462

</fontfamily>With the publication of

<bold>Field trials of cotton varieties not `terminator' related

</bold>archive 462, if not on 25 Nov (see below), Prof M D
Nanjundaswamy surely knows that Bt cotton is not terminator related.

Also, it should not be expected that the Bt cotton will kill ALL
bollworms, Like many environmentally friendly approaches, it is only
partially effective.



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