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Materia Medica

Planting by the Stars






Thuja Occidentalis

From the homeopathic pharmacopoeia

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Effect on plants -

Named Issues
Pests in general, mites, hawk moth, scale, blister mite, rust mite. Pests in Cucurbitae. Cancer in trees. Galls. Farcy and grease in horses. Fungus gall. Housefly, stable fly, blow fly. Worse manuring, watering, cold rainy weather. red spider mite. (3)
Flies (213)
Spider mite (496)
Scale infestation (496)
Peach leaf curl (496)
Grubs on currants (496)
Lyonetiidae moths (496)
Monila (337)
Lime tree borer (336)
Apple leaf miner moth (Lyonetia clerkella): (496)
Fungus (337)
Blight - fast spreading (337)
Canker (337)
Monilia (337)
Black spot (337)
Black spot (337)
Blight on strawberries (674)
LAce bug (748)
Monilia (496)
Peach leaf curl (496)
Spots on orchids (1529)
Fungi (1707)
Nematode (root knot) (1734)
Leaf miner (1759)
Root rot (1790)
citrus greening (Liberobacter asiaticum) (1803)
Leaf curl (496)
Fungal disease (1810)
Brown rot after rain (1810)
Leaf curl, leaf spot, brown rot, viruses that cause fruit and leaf deformities and growths. Powdery or downy mildew from very damp warm weather, lengthy periods of warm rain. (1810)
General Appearance
I have these massive giant horseflies that stay on my frontporch near the front door, nowhere else near the building only there. They are really ugly, big like a bee, sound like a bee, just not a bee its for sure a fly. There is no water/no food/no dead animal/the porch is very clean - I dont know why they stay there? Each day I swat 4-10 of them!... Guts all over, massive mess, not great for foot traffic. I placed a smallcup of water with one globule of thuj 200C (could not find my lower potencies for some reason?) placed it near the frontdoor on the floor. (I used the repertory in Homeopathy for farm and Garden); prior to using homeopathics: aprox 10-20 gianthorseflies daily. Not the normal sized flies... day 1 of thuja - flies spotted 85% less .. day 2 of thuja - no flies spotted day 3 of thuja-no flies spotted, I did not succuss the potency of 200C just droped the one globule of thuja in a small cup aprox 4 oz in water, let it sit on the floor in front of the door, nothing else. (213)
House plant with scale insect infestation. Watered many times with a solution of Thuja (amount and dosage unknown). Within 2 days, no more movement could be seen - after 14 days, all the scale insects had died. (496)
Results indicated that treated seeds of mung bean, sunflower, okra and mash bean with pure homeopathic drugs (100% v/v) by A. montana and T. occidentalis (30C) showed complete germination (100%), greater root length and excellent inhibition of root infecting pathogens (1707)
Root rot (1787)
Observations showed that .. T. occidentalis (30Q) when used in 100% v/v concentration not only improved plant growth but showed complete inhibition of root rot fungi like R. solani, M. phaseolina and Fusarium spp. followed by 75 and 50% v/v concentrations which also enhanced plant growth and showed maximum inhibition in both leguminous and non-leguminous plants by using seed treatment and soil drenching methods, respectively. (1790)
Stem/trunk and bark - capillary system
Warty growths and cancers (337)
Canker - in alternation with carncinosin (337)
House plant with spider mite infestation Ponytail palm was badly infested with spider mite. Dead leaves were removed; but the new leaves were subsequently also found to be infested. The plant was treated once with Thuja 6, with the result that the spider mites disappeared after a few days. (496)
Lyonetiidae moths: These little animals had always left marks on the leaves of my Iberis. The leaves looked like parchment paper and, if badly infested, the plants died. The first time I saw them this year, I watered the plants with Thuja 6D (5 ml /10 liters water) and the spell was broken. (496)
... leaves dried and fell off the [old cherry] tree as if it were autumn. I watered the trunk and the soil [with Thuja 200 C] .. repeated one week later. The tree recovered quickly; it was still losing dry leaves but it started putting forth healthy looking green leaves in their place. ... it was probably the only cherry tree near Lake Constance which still had a full crown of green foliage. All the others were suffering from 'monila tip drought'. (337)
Yet to see any borer this season (reported from NZ) (336)
Apple leaf miner moth (Lyonetia clerkella): These little beasts had been constantly leaving traces in the last few years on the leaves of my Iberis - the leaves then looked like parchment paper and the plants died in cases of severe infestation. As soon as I saw them appear this year, I watered them with Thuja D6 (5 ml / 10 l water) - and that cured it. (496)
Mouldy grey or black spots. Leaf curl - and fall. (337)
Monilia tip burn - leaves turn brown and die, Blackish swellings (337)
Black star shaped spots after cold and wet weather, fog etc (337)
Black star shaped spots after cold and wet weather, fog etc (337)
.. my strawberries had blight. I tried treating them with Sulphur 30c, but I don't think that had an effect, so I tried Thuja 30c, watered on twice about 5 days apart. ... the leaves are now coming through very vigorously and the blight seems to have gone. I think this is officially my first success with agro homeopathy! I can't tell you how pleased I am that it's working!! (www) (674)
Last year I sprayed my son inlaw's Rhodedendrum with Thuja 6c for lace bug. That worked quite well. (748)
The leaves of a pear tree were affected by pear trellis rust in spring. It was successfully treated with Gelsemium 200 C. The affected leaves died off and the new growth was healthy. A short while later the tree was affected by monilia, causing the tips of the leaves to shrivel. Watering with Thuja 30 C caused the monilia to disappear but then the pear trellis rust reappeared... A repeat application of Gelsemium 200 C once again got rid of this problem ... (Seminar report by Christiane Maute) (496)
I watered a peach tree badly affected by curly leaf disease for 4/5 weeks with Thuja 6D. About every three to four days, I made a solution of one capful (approximately 1 ml) diluted in 1 litre of water, and applied it directly and carefully round the trunk of the tree. I also gradually removed the affected leaves. Since about one week, all new, fresh leaves are healthy and the peach is now growing normally again. The tree looks good and appears to have recovered well. (496)
Black spots on the leaves of orchid plants ... After 10 days I saw a distinct improvement in most of the plants. (1529)
Leaf miner attacked holy basil plant and the tomatoes....Thuja was very effective against leaf miner. In fact, Thuja has proven to be a pretty useful “organic pesticide”. (1759)
I have had leaf curl on my nectarine trees for many years. My landscaper always had me spraying chemicals. After removing the curly leaf greenery, I did ONE treatment of Thuja for my nectarines on a Tuesday, by Friday I had new leaves coming out without a single blemish!! I am SOLD. (496)
Blossoms turn brown and die (337)
Generative organs
Red peach tree with signs of disease (reminiscent of large, ugly warts) on the leaves, 4 pellets dissolved in water, this solution used to water the roots - after a short time, normal development with copious peach harvest.` (496)
Grubs on currants: 3 pellets in 10 liters water, applied once by watering, to combat grubs on currants - after one week, no more eaten-away areas could be seen. (496)
Fruits become hard and wrinkled in blight. (337)
Monilia fruit rot. Blackish swellings (337)
All tree trunks injected with these drugs showed recovery from the disease, with Cedron at 1% giving better results. (1803)
Deformed fruit (1810)
Notes and Academic Papers
Many borers can be treated with Thuja, as it is a remedy that can neutralise "animal poisons" such as vaccination and its negative effects in humans. Thus many insects that attack plants and trees will respond to this remedy especially if disease is the result of pest attack, like barley yellow dwarf virus, mosaic virus and other viral and bacterial disease. (3)
Worse from damp cold and fog (337)
Even though no preparation differed significantly from another; the Thuya homeopathic treatment yielded the best results with more than 26 t ha-1. (1694)
Chamomilla 60CH, Silicea 60CH, Kali 60CH, Thuya 60CH, biotherapic of Phytophthora infestans 60CH, water 60CH, the homemade preparations of Bordeaux mixture at 0,3% and of propolis extract at 0,5%, and, finally, a no-intervention treatment. Results showed that the Catucha genotype, a bred landrace, yielded 21 t ha-1 and presented the lowest disease incidence. Even though no preparation differed significantly from another; the Thuya homeopathic treatment yielded the best results with more than 26 t ha-1. Natural enemies were not affected by any of the spray preparations (1694)
... tested seeds treated with 75 and 50% v/v concentrations (prepared from 30C) by homeopathic drugs, respectively recorded significant increase in germination, root length and maximum zone of inhibition. (1707)
Thuya had no effect on eggs hatching, although was observed that the treatment of 200CH caused a possible reduction in eggs hatching (19%) compared with the control treatment. (1734)

Effects on Climate -

Visual symptoms
Notes and Academic Papers

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