The most famous insecticidal plant pyrethrum & # 8221
Pyrethrum is a perennial herb of Compositae, which has the elegance, freshness and chic of Compositae.
However, such a beautiful plant is a deadly nemesis of insects such as mosquitoes. It turns out that pyrethrins contain pyrethrins and gray chrysanthemum. Pyrethrins are also called pyrethrins. They are colorless, viscous, oily liquids. When mosquitoes come into contact with them, they will be paralyzed, poisoned and die. Pyrethrum can not only kill mosquitoes, but also kill fruit and vegetable pests. Because of this, it and tobacco, poison derris were pro-collectively known as the "three plant pesticides."
Time: 2019-04-17 Click:
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The Flower of death-an extremely beautiful but strange plant-Crystal Orchid
A man went to a mountain village in Shaanxi Province to climb a mountain. When he climbed to the top of the mountain, he accidentally found a small piece of strange plant. The plant was crystal clear and translucent, and it looked as if it had been wrapped in a thin film. It looks like shrimp dumpling, which we usually eat, standing quietly on the ground. The man was curious.
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What about yellow leaves?
Hibiscus flowers are prone to bud drop, which is caused by improper maintenance and imbalance of nutrient supply in plants. Fusang is a strong positive flower, and its nature likes sufficient sunshine. If it is too shady for a long time, the light is insufficient, and too much watering is carried out at the same time, the pot soil is in a wet state, which will cause rotten roots, resulting in deciduous leaves and buds falling.
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