Hi all,
Sorry about the vagueness of my request. I didnt have the latin
names in front of me (only the names in Portuguese). The most
important disease for this area is "requeima" (phytophthora
infestans). The principal pest is "broca pequena" (Neoleucinodes
elegantalis), for which there is no control (including no registered
toxic). The first expirament will look at both the effect of Alley
cropping with corn, and a rotation crotalaria spp. (a legume ) -
tomato - oat - tomato. A second expirament will look at the effect
of two foliar applications on requiema: 1) is "Calda de Vicosa" - a
solution of copper sulfate, magnesuim sulfate, zinc sulfate, boric
acid, Cal, and water. 2) is sulfer calcium - solution of sulfer,
hidrated Cal. These solutions are being used as alternatives to the
toxic fungicides available. My question is: Are these really
alternatives? I do not have the chemistry background or information
available as to their toxicity.
Thanks for the help.
Lena
>
> I suggest we start by ennumerating the "pests and diseases" that will have to be dealt with. "Innumerable" doesn't give much to go on. It would also be appropriate to know something about the growing conditions - rainfall, tempreratures, location, altitude etc.
>
> Douglas M. Hinds, Director
> Centro para el Desarrollo Comunitario y Rural, A.C.
> (Center for Community and Rural Development, Non-profit Association)
> Cd. Guzman, Jalisco 49000 Mexico
> U.S. Voice Mailbox: 1 630 300 0550 (e-mail linked)
> U.S. Fax Mailbox: 1 630 300 0555 (e-mail linked)
> Tel. & Fax: 523 412-6308 (direct - Cd. Guzman, Jalisco)
> Tel. & Fax: 528 922-2424 (direct - Reynosa, Tamaulipas)
> No Tel. or Fax yet in the Cuenca de Papaloapan (Oaxaca & Veracruz)
> e-mail: cedecor@acnet.net, cedecor@ipnet.com.mx, dmhinds@acnet.net
>
>
> *********** REPLY SEPARATOR ***********
>
> On 31/10/97 at 12:45 PM Lena Miller wrote:
>
> >Dear list members,
> >I am new to the list and look forward to the upcoming discussions.
> >Currently, I am pursuing a masters program in Rio, Brazil. Here we have
> >innumerable pests and diseases which greatly limit the production of
> >organic tomatoes. The amount of pesticides used is incredible. I am
> >looking for bibliografic information dealing with the organic production
> >of tomatoes (intercopping or alley cropping with corn and also rotations
> >with oats and legumes) and control of pests and disease. If anyone has
> >any resource leads (internet or written material), it would be much
> >appreciated. Thanks for your help.
> >
> >Lena
> >
> >
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