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Healthy palm versus ill palm
06-30-2019, 11:24 AM (This post was last modified: 07-05-2019 10:56 AM by lillyan.)
Post: #11
RE: Healthy palm versus ill palm
(03-14-2016 10:44 AM)Ramiro Wrote:  
(03-14-2016 07:55 AM)jvoitl Wrote:  Can you give us the two images with the same https://www.rippednatural.com/ temperature scale so we can compare them?
Of course, with medical pallete in order you can see clearly the temperature steps (isotherms): in this case the healthy palm has only blue & green colours (around 15ºC) but the ill palm with red palm weevil has higher temperaturas (pink, red, orange & yellow colours).

Here is the new link: https://image-store.slidesharecdn.com/6d...ginal.jpeg

Regards,
--
Ramiro Alvarez Clavero
Remote Sensing Service
http://gravatar.com/ramalvclav


Wow so this is a clear example of global warming. Just imagine how high temperatures affects other trees, plants and animals.
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07-01-2019, 08:04 AM
Post: #12
RE: Healthy palm versus ill palm
This is NOT a direct example of global warming. This is an example of a plant with an infestation having a higher temperature than a healthy plant.

Jack Kleinfeld, P.E.
Kleinfeld Technical Services, Inc.
1-718-884-6644
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08-20-2019, 08:47 PM
Post: #13
RE: Healthy palm versus ill palm
(03-14-2016 10:44 AM)Ramiro Wrote:  
(03-14-2016 07:55 AM)jvoitl Wrote:  Can you give us the two images with the same temperature scale so we can compare them?
Of course, with medical pallete in order you can see clearly the temperature steps (isotherms): in this case the healthy palm has only blue & greeen colours (around 15ºC) but the ill palm with red palm weevil has higher temperaturas (pink, red, orange & yellow colours).

Here is the new link: https://image-store.slidesharecdn.com/6d...ginal.jpeg

Regards,
--
Ramiro Alvarez Clavero
Remote Sensing Service
http://gravatar.com/ramalvclav

Striking images but then again, at this point, visual symptoms of the palm with infestation are quite apparent from a healthy palm without resorting to thermal IR imaging. IMO the principal value of thermal IR in agronomics comes from being able to detect biotic and/or abiotic stress before the manifestation of visible symptoms when Rx decisions could be made. Temperature differentials would be much smaller than depicted in your images requiring precise quantitative analysis.
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