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How to grow pyrethrum: the guide to cultivation of the pyrethrum plant, the insecticidal plant with a thousand applications in the garden or at home, to eliminate flies and mosquitoes. How to obtain the insecticide from harvested plants.
TheDalmatian pyrethrum, so called for its origins, it bears the botanical name ofTanacetum cinerarifolium. We are talking about a rustic plant that can be grown for the preparation of a natural broad-spectrum insecticide.
Pyrethrum plant: Tanacetum cinerariifolium
The pyrethrum plant, Tanacetum cinerarifolium, has a robust root system capable of supporting a thick bushy foliage. The slender stems are very branched and can reach an average height of 50 - 60 cm.
The leaves have strongly jagged edges and are recognized by the particular smell: if engraved or rubbed between the hands they give off that odor that acts as a repellent for insects and parasites, but the smell of the leaves is not the real "pearl of pyrethrum. ".
To eliminate the parasites of the garden are the pyrethrins, compounds capable of acting on the nervous system of insects.
The greatest concentration of pyrethrins is present in pyrethrum flowers and partly in seed.
Therecultivation of pyrethrumIt is not only convenient for the health of the garden but is also beautiful to look at: this plant produces numerous flowers similar to daisies with white petals.
The flowers give life to small achenes (fruits) with a light brown color, it is from the achenes that you can extract the pyrethrum seeds to plant. To take advantage of thepyrethrum plant, however, we must not wait for the fruit to appear but we must collect the flowers that have just opened.
How to use the pyrethrum plant as an insecticide
Thepyrethrumit blooms between May and June. It is in this period that it is possible to harvest to proceed with the drying of the bunches of pyrethrum and then independently prepare the natural insecticide to be used in the garden.
The dried flowers can be used as an anti-mosquito (to eliminate flies, mosquitoes and cockroaches) or natural pesticides in the garden.
How to use the pyrethrum plant as a natural pesticide? All you have to do is dry the flower heads and then grind them and obtain a powder as fine as possible. This yellowish-green powder will be rich in pyrethrins and, when mixed with water, will create a natural spray insecticide that can be applied to the garden plants to be treated.
In the article entitled "Pyrethrum, natural insecticide "I have explained to you, in detail, how to use pyrethrum to make the most of its effectiveness. In fact, as with most of the chemical pesticides that are found on the market, with the pyrethrum you need to have some extra care. You must not forget that they are still natural compounds and not industrialized poisons for agriculture!
How to grow the pyrethrum plant
Cultivating pyrethrum it is easy and, as stated, also the preparation ofnatural insecticide do it yourself pyrethrin based is just as simple using dried flowers.
To grow the pyrethrum plant, the first thing to do is to find the seeds Tanacetum cinerariifolium. Pyrethrum seeds can be found at specialized agricultural consortia or by taking advantage of online sales.
Pay attention that often the nurserymen and consortia instead of supplying seeds of the Tanacetum cinerariifolium species, give anotherpyrethrum plant, very similar but with much lower pyrethrin concentrations, this is the speciesC.coccineum.
Thepyrethrum plantsYes they cancultivate in the vegetable gardeneven just for its repellent properties. In many locations around the globe, thepyrethrum plantsthey are grown on the edges of gardens and vegetable gardens, as ornamental plants to repel aphids, bedbugs (Cimex lectularius), leafhoppers, mites, ticks, caterpillars and other worms and parasites that ruin the crop.
How to grow pyrethrum
For thecultivation of pyrethrum it would be advisable to choose a sunny place, however, since it is a rustic plant, it grows well even in partial shade.
The pyrethrum plant it can tolerate even the winter cold and frost well, which is why in winter it does not require special cultural care.
Equally versatile is the choice of terrain, thepyrethrumit grows well on any type of soil mixed with peat and, to avoid root rot, it is recommended to add expanded clay or implement plans to prevent water stagnation. The pyrethrum is the pesticide plant therefore it is not afraid of infestations par excellence, the only problem could arise only in case of water stagnation which would damage the root system of tansy.
Thepyrethrumit must be watered regularly in the spring-summer period. In the height of summer, it is best to keep the soil moist constantly.
To allow for good flowering, it is recommended to administer slow-release granular fertilizer at the base of the plant. It will be enough to fertilize the plant twice a year, respectively in the months preceding flowering (March - April) and in the months preceding the winter frost (September - October). As an alternative to slow-release granular fertilizer, it is possible to fertilize pyrethrum with mature manure.
Pyrethrum, sowing or planting period
Forcultivating pyrethrumit can start from the seed or with the division of the tufts. Sowing can be done in March in a soil that is kept constantly humid. Those who prefer to start with a plant of pyrethrum semi-started can begin cultivation with the division of the tufts acting in late spring.
Pyrethrum or tansy?
Thepyrethrumit is botanically definedTanacetum cinerarifoliumor even better, Chrysanthenum cineralifolium. The name can lead to confusion with the municipalitytansywhich looks like thepyrethrumfor its jagged leaves. Even the common tansy can be used as a pesticide but it cannot boast the same insecticidal properties as pyrethrum.
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