How to prevent and control bud rot, (botrytis), mildew and rust on plants
BUD ROT can occur in 2 ways, either as internal rot or external rot.
Internal rot: This is usually the case, and is associated with condensation caused by high humidity at flowering time. The plant absorbs water and nutrients through its main root and root hairs and transports them through the stem to the leaves. From here, the moisture is distributed to all other parts of the plant. This takes place only if the plant releases enough water vapour back into the atmosphere, at low atmospheric humidity, for example. Not only the flowers at the top, but also the flower tops at the bottom will absorb the essential nutrients and can then be used for harvesting, as a result.
If no vaporisation occurs, the moisture will remain in the flower tops higher on the plant. When this supply of moisture in the flowers at the top of the plant becomes too much, plant cells will then swell, releasing the dirty water and cause the fungal disease botrytis. The symptoms become slowly visible after a few days only and the process will then continue to occur subcutaneously.
External rot: If a spore (seed) of the fungal disease, botrytis, is carried inside, it will try to nestle in the old wilted leave. And fungus will then develop within 6 hours.
Because of the heavy and intense air circulation, the fungus will spread throughout the nursery garden in no time. Because the fungus is coming from the outside, it is easier to fight.
MILDEW AND RUST
Occur on very soft leaves. This is because the plant has absorbed more N (nitrogen) than other nutritional elements. The initial symptoms first appear at the door or the air inlet. Because these fungi develop quickly on the plant, fast intervention is essential, especially since these fungi will try to suffocate your plants.
A.R.T.S. has developed a special product for this called Fungus Free, which you will need to use as a preventive measure from the outset. To start you off, plant the young fragile plants in moist soil or coir.
When planted, prepare 25 ml. solution and spray it on the plants. Repeat this every 10 days until about 2 weeks before harvest.
And to prevent the development of the bacterial disease root rot - which usually occurs when plants are in stress, at cultivation and flowering time, for example - immerse the roots of the young plants in the prepared ROOTROT (A.R.T.S. Wortelrot) mixture, before continuing to plant.
This will protect your plants against this bacterial disease for the first 6 weeks.