1. Grey mould: it is a fungal disease, which will damage the leaves, petioles, stems, flowers and other parts of Ranunculus japonicus, even the whole root system. At the beginning of the disease, we can spray metformin, zineb, carbendazim and other chemicals, once every 10 days or so, 2-3 times in a row.
2. white silk disease : it mainly damages the stem base of the plant, and it will produce water stains on the affected parts. It is necessary to strengthen cultivation, spray 75% chlorothalonil wettable powder 500 times at the beginning of the disease, which can alleviate the disease.
3. virus disease & nbsp;: it is mainly caused by the damage of leaves, which causes the leaves to shrink, shrink and thicken. In the later stage, when the disease is serious, it will lead to plant Dwarfing and may wither and die. In the early stage of the disease, 68% of the virus wettable powder and imidacloprid were used to kill the transmitted pests.
4. Root rot: after the plant is infected with this disease, it will cause root rot, and the plant will gradually dead . At the onset of the disease, the roots can be perfused with tolbutine methyl and Brett.
1. Liriomyza melanogaster: the larvae are parasitic in the leaves, and the adults will form round spots on the leaves, and the ornamental value of the injured plants will be damaged. When insect damage is found, spray with fenpropamine and cypermethrin emulsion.
2. Aphid: this pest will gather and distribute on the leaves, sucking the juice inside, causing the leaves to lack of water and dry up. It can be sprayed with 50% Pirimicarb and 20% methomyl emulsion.
