Anthurium pests and control of Anthurium

Anthurium is extremely sensitive to insecticides and bactericides. It is hard to say which phytotoxicity will be caused by which pesticides will be sprayed, and the phytotoxicity is often manifested only after a few weeks (sometimes 6-8 weeks), usually The newly formed leaves are prone to symptoms, and the immediate manifestations of injury are generally brown and yellow. The general requirement is not to spray during the period from 11 am to 4 pm, because the temperature and light are very high at this time, but it is sprayed in the morning or evening. When spraying in the evening, be sure to dry the plants before the night. The common pesticide poisons are: 1. Red, charred red patches on young leaves and leaves, abnormal marginal shrinkage. 2. Copper-containing pesticides can cause fading and whitening of calyx. 3. Rust-like red spots appear on the leaves of old leaves. The following pesticides will cause poisoning on the red palm: diazinon, methamidophos, malathion, dimethoate, sulfoxides, acephate, enemy Rongzhi, demethylcarbazole, Prozacarb, and parathion. A. Bacterial diseases (Xanthomonas campestris PV.) Symptoms are mainly on leaves and flowers, with brown squatting in the middle and yellow on the edges. Water-stained spots can be seen in the transitional areas of uninfected infected cells. The epidemic disease spreads extremely fast and can cover most of the leaves. In some cases, the disease can enter the cell and transmit the vascular bundles, so that the whole plant death (ie, systemic) epidemic usually starts from the leaves and flowers, and the infected part is cut off in time. It can prevent the spread of infection from the trough tissue. There is no specific cure for bacterial diseases. The treatment methods are as follows: 1. The seedbed is regularly sprayed with streptomycin sulfate or oxytetracycline. Plants can also be sprayed with these agents (spray-a-week-time, concentration diluted to 6-8 times). 2. Remove or isolate infected plants. 3. Do not apply XH4 fertilizer to reduce total fertilization. B. Erwinia (Erwinia) Symptoms: Leaves yellowing, starting from the base of the petioles and rising along the main vein, especially on the seedlings. Control method: Use streptomycin sulfate with an effective amount of 4 g/L, 1.5 g / 100 liters of water spray C. Pseudomonas disease Symptoms: necrosis along the veins, sometimes with the veins as the boundary of the lesions, dark spots usually have a very thin yellow circle, control methods: see the disease Prevention and control A. D. Scab (Anthracnose, colletltrichem gloseosporioides) Symptoms: In the humid environment, causing numerous dark spots on the leaves, dry conditions in the edge of the leaves when the wet caused by light spots, are much like fertilizer too strong At the time, the focal spot is also prone to similar symptoms on the leaf sheath.On the sepals of the small flowers, the spot disease can cause countless brown spots on the base of the sepals, and it is necessary to note that the anthrax is distinguished from the intense sunburn spots. : Benzoate, carbendazim, captan, chlorothalonil, chloramphenicol, etc. are sprayed 600-1000 times E. root rot (Pythium / Phytophthora) Symptoms: root rot is due to the dry matrix, Wet or over In the case of fungal diseases caused by unfavorable conditions such as cold, the roots appear to rot locally, and the leaves turn yellow at the edges of the leaves, the leaves are soft and sagging, the roots are brownish, and the roots are still not rot. Root rot can be caused by Phytophthora, and It can also harm the stems and even the leaves, resulting in discoloration, such as brown, and can be used furazolid, propamocarb hydrochloride, epidemic cream spirit, dimethomorph, etc. F. Cylindrocarpon destructans Symptoms: The leaves gradually became dry, showing yellowing, fading and wilting, and the base of the plants turned brown and sometimes contracted. This fungus can penetrate from the base of the stem and penetrate into the roots continuously. The control method is to spray the following agents: Benzolide, Thiopropetate Bujin, carbendazim, etc. G. cylindrocladium Spp Symptoms: This type of bacteria is the root and base of the plant and is dark brown. H. Fusarium SPP Symptoms: Rotation of the base of the plant, Fusarium It is the secondary disease caused when the environmental conditions are not suitable for the growth of the plant, and the subsequent invasion of the Fusarium bacteria in the vascular bundle of the main stem will follow after the infection. Leaf disease (5eptorla anthuil schistosomiasis) Symptoms: The formation of brown leaf spots, the center withered, the periphery is a ring of yellow tissue.Control methods: Kedisdan, chlorothalonil, and manganese sulfate zinc coating. (Rhizoctinia) Symptoms: This type of fungus causes the coloration of the base and the root of the plant, such as the healdification or blackening, and the damage mainly occurs at the interface between the matrix and the air.The prevention and control method is to infiltrate the following agents: benzoate, carbendazim, and Bacterial urea (promethine), phytophthoraine, methyl-trichlorphon K. There are three main types of nematodes: root-knot nematodes, internal-invasive nematodes, and grass-spotted nematodes. The genus MelOiddogyne is a genus of the genus Nematode. This type of nematode invades the growth and causes the roots to swell. The latter two will also make the plant grow worse, but the roots are brown patches rather than swelling. The nematode in this eroded patch quickly blocks the roots in the area, which in turn causes secondary infections of the fungus and the formation of root rot. Prevention measures include: 1. Before planting, the cultivation matrix should be steam sterilized, or use a brand new cultivation matrix. 2, buy seedlings at the expense of disease. 3. The cultivation system leaves the ground. 4, strict health practices. L. 1. Symptoms of aphids: The aphids themselves are light green, yellow or pink with 6 legs and a length of 2mm. The population of locusts develops very rapidly because it is born and raised and will share juice and honey, leading to the growth of fungi. Aphids cause spots on flowers and leaves, which reduces the quality of the product. They also suck the sap of the plants, and then inject the venom into the plant tissues to affect the growth of the plants. There are many plant hosts in the locusts, which can cause rapid transmission of the disease. Control methods: spray any of the following agents and spray it again after five days: Kang Wei, Hepene Phosphorus, Biphenyl Chrysanthemum, Efficient Da Gong Chen (Imidacloprid) . Or use natural enemies to control. M. red spider mites are mainly (greenhouse) red spider and red bean spider mite (Tetranychus urtica). Symptoms: The spider aphid (or spider aphid) is a very small oval (elliptical), spider-like, white to green (sometimes brown to red) transparent insect that causes young leaves or buds The wilting. They penetrate the plant cells and draw their contents from them, causing the cells of the plant to become silvery white. Red spiders appear on the old leaves of Anthurium and cause yellowing and fading of the plants when severely damaged. If damage is observed on flower buds, brown dots can be seen. If development is very severe, spiders can be seen on the net. The control method is the use of acricides: dicofol, avermectin, omethoate, triazotin, sulfacetimine, cotton wool, diazin phosphine, bufalin, biphenyl Ester, fenbutatin, thiazolyl, mortal net. N. Mites Symptoms: Mainly manifested as discoloration (fading) of leaves and flowers, blockiness and deformation of tissues, these defects are invisible to the naked eye. Control methods are described in the previous method for control of red spider mites. The more broad-spectrum acaricides are Talsta, F01 imat, Pentac, and Kelthane). 0. There are two main types of whitefly: Trialeurodes, Vaporariorum, and cotton or Benisia tabaci. Symptoms of Infestation: The insect is about 1mm long and the adult body has a waxy white powder; this makes it look white. The greenhouse whitefly is most vulnerable to weeds. Benisia tabaci is the main cause of Anthurium. They suck the cell contents to make them dry, thus discoloring the leaves, and secrete dense juice on the leaves, which in turn causes the breeding of black mold to further cause diseases. Control agent: million spirits, crickets must die, phlegm net, pyrithione, kill tin. P. Snails and crickets chewed on their root tips to break the leaves and buds. If there are many small vesicles on the leaves, they are usually snail-dried. Snails can be baited with beer or chips. Shellfish killers are: Methionine, snails, or both semi-mixed. O. Virus Ma Ling potato spots withered virus, Symptoms: Black necrotic dry spots, spots with yellow rings, this ring is visible. The virus does not pose a big threat because the plant cells will quickly isolate it. This virus is transmitted by the thrips, and it was picked up by the thrips larvae. After deuteration, the thrips were introduced into the plants. According to current knowledge, this virus is not mechanically transmitted. Control methods: There are few effective control methods for viruses. They must be controlled against the pests that spread the virus to prevent the threat of thrips. In the case of virus infection, only the timely removal of isolation can occur.


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