Cut flowers in the moon season (roses) Because it represents love, many flower lovers like to cultivate.
The following small series to share with you some common pests and diseases in the month.
1. Diseases:
1. Monthly branch blight: long-term high temperature is especially suitable for the growth of pathogenic bacteria and conidia, so it often occurs in summer, while drought stress will aggravate the disease, and the bacteria are easy to invade from the wound. Prevention: timely pruning of diseased dead branches burned, shearing as close as possible to the axillary buds, and should be cut off at the same time along with part of the healthy branches, the shear is smeared with lime water; spray protection, the agent can choose 50% mycote 1000 times liquid.
2. Leaf blight of the month: spread by wind and rain, invaded by wounds, and the edges of leaves are heavily damaged. The onset of old leaves is severe in autumn. It is easy to get sick in high temperature and humidity weather. Prevention and control: timely removal and destruction of diseased leaves to reduce the source of disease; spray 90% bacillus 500 times liquid or spray 50% carbendazim 500 times liquid.
3. Monthly black star disease: mainly occurs in the alternation of summer and autumn, endangering leaves. Prevention and control: timely removal of diseased leaves; spray 800-1000 times bacillus clear liquid.
4. Monthly black spot disease: mainly occurs under the conditions of high temperature and high humidity in summer, which is seriously harmful, resulting in the shedding of all leaves. Control: remove deciduous dead branches in winter, and spray 5 stone sulfur compound; apply more phosphorus and potassium fertilizer to improve plant disease resistance; spray 50% carbendazim wettable powder 1000 times liquid, 50% daisen ammonium 1000 times, 70% methyl tolbuzin wettable powder 1000 times liquid.
5. Powdery mildew in the month: the incidence of disease is serious under high temperature conditions, and drought also leads to serious disease. It mainly occurs from May to September every year. Prevention and control: prune diseased buds, branches and diseased leaves; apply less nitrogen fertilizer and more phosphorus and potassium fertilizer to enhance resistance; spray 25% powder rust rather wettable powder 1500 times liquid, 70% methyl tolbuzin wettable powder 1000 times liquid.
6. Monthly rust: mainly occurs in the alternating seasons, after high temperature and low temperature, the disease can be controlled. Prevention and control: timely pruning of diseased buds, diseased leaves and diseased branches; spraying 50% bacterioste clear 600 times liquid, 50% 500 times of antibacterial special liquid, 50% of Fumei double 500 times liquid, 25% powder rust rather wettable powder 1500 times liquid.
Second, insect pests:
1, the peak of the leaf in the month: 5-6 months feathering adults, with the oviduct in the new shoots of the month into a longitudinal crack to lay eggs, after the egg hatching, the larvae cluster hazard, a large number of cannibalized leaf flesh, and the speed is faster, serious can eat all the leaf flesh, only the leaf veins and petioles remain. Control: During the larval stage, using its suspended death, artificial killing can be carried out; killing overwintering pupae; spraying cypermethrin 2000 times bromide.
2. Moon season yellow thorn moth: harmful to the cortex and leaf flesh tissue under the leaf, when severe, the leaf flesh can be eaten, only the leaf veins and petioles are left, which is seriously harmful to the moon season. Control: remove the overwintering insect cocoons on the branches; use black light to kill adult insects; spray 90% of the enemy insects 500-1000 times the liquid.
3. Monthly stem bees: mainly harmful to the stem, serious can lead to the death of the whole plant, mostly lay eggs on the new shoots or flower stalks, and are harmed by larvae moths into the stem. Control: prune the affected branches; spray 40% oxidized 1000 times liquid during the incubation period of the larvae; inject 1000 times the solution of the pyrethroid drug into the borer holes, and then seal the orifices with mud.
4, the monthly red spider: high temperature and dry season is easy to occur. Mainly sucking leaf sap, the affected leaves show small yellow spots, and then gradually spread to the whole leaf, causing the leaves to curl and yellow to fall off. Prevention and control: remove the dead branches of the surrounding weeds, enhance ventilation and light transmission; spray 50% bromomeride emulsion 2500 times liquid or avermectin; red spiders are strongly resistant, and attention should be paid to the alternating use of acaricidal drugs.
5, the monthly long tube aphid: mainly in the spring and autumn two seasons of social habitat harm to new shoots, young leaves and flower buds, so that the flower growth momentum is weak, can not grow normally, and even can not bloom, flowers and even attract the occurrence of coal pollution and viral diseases. Alternating seasons and droughts are prone to occur. Control: prune insect branches, remove weeds and leaves in time, protect predatory ladybirds, and spray 1000 times the liquid of imidacloprid.