Q. I am sending you a picture of my funky looking tree. I
think it has some sort of disease problem.
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A Yes, it does look like a disease problem but I think it
will stop spreading as soon as the humidity goes back down and rains stop. In
fact, this problem most likely occurred a few weeks ago since the new leaves
coming out seem unaffected.
will stop spreading as soon as the humidity goes back down and rains stop. In
fact, this problem most likely occurred a few weeks ago since the new leaves
coming out seem unaffected.
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| Plant disease triangle needed for disease to develop |
. Diseases
need to have three ingredients, all coming together at the same time, to
manifest themselves. First, the plant needs to be susceptible to the disease.
Plants that are not susceptible or have been bred to be resistant to a disease
will not normally get infected.
need to have three ingredients, all coming together at the same time, to
manifest themselves. First, the plant needs to be susceptible to the disease.
Plants that are not susceptible or have been bred to be resistant to a disease
will not normally get infected.
Secondly,
the disease itself needs to be present. This is why I continually ask readers
to sanitize their equipment, inspect plants for problems before you buy them
and rotate your vegetables.
the disease itself needs to be present. This is why I continually ask readers
to sanitize their equipment, inspect plants for problems before you buy them
and rotate your vegetables.
The
third ingredient is the right kind of weather. Most diseases are caused by
fungi, the majority of our plant diseases here, and grow and spread under high
humidity and rainy weather.
third ingredient is the right kind of weather. Most diseases are caused by
fungi, the majority of our plant diseases here, and grow and spread under high
humidity and rainy weather.
Disease
control focuses on interrupting or preventing one of these three ingredients. All
we need is a drop in the humidity and it will stop. Also pruning so that you have
good air movement through the canopy will also help prevent and reduce its
spread.
control focuses on interrupting or preventing one of these three ingredients. All
we need is a drop in the humidity and it will stop. Also pruning so that you have
good air movement through the canopy will also help prevent and reduce its
spread.