Plant strengthening substances
Quassia extract (Quassia amara, bitter-wood)
Application against
Sawflies
Aphids
Leaf miner
Mode of action
Frassing and contact poison.
Paralyses insects as a neurotoxin.
Impact remarks
Treatment against the newly hatched larvae immediately after flowering.
Side effects
Little harm to beneficial insects.
Application
Not miscible with sulphur lime and alumina preparations.
Can be made from bitterwood itself.
Can only be used when the flowers are in bloom.
Aggregates, soil additives, algae extracts, crop aids, homeopathic preparations, microorganism preparations
Scope
Soil improvement and plant strengthening
Mode of action
Various, partly unknown
Impact remarks
In fruit growing, no scientific evidence of a direct plant protection effect known so far.
Biodynamic preparations
Scope
Soil improvement and plant strengthening.
Mode of action
The biodynamic preparations primarily serve to strengthen plants and activate the life processes in the soil and in the plants through the integration of cosmic energies that is attributed to them.
Impact remarks
The six preparations 502 to 507 (yarrow, chamomile, nettle, oak bark, dandelion and valerian – the six co-called biodynamic compost preparations) are used in very small quantities exclusively for biodynamic manure or compost production.
The so-called field spray preparations of cow dung (preparation 500) and horn silica (preparation 501) are ‘dynamised’ by stirring and applied in very high dilutions and at certain planetary constellations to the soil (500) and several times to the plants (501).