Disease of Rose

Many types of diseases that attack roses are:

1. Black spot
Cause: The disease is due to the fungus (mushrooms) Marsonina rosae (Lib.) Lind. ("Black spots").
Symptoms: leaf spots of concentrated black-toothed edges. Gradually the spots ± 1 cm diameter fused, so that leaves the surrounding tissue becomes yellow. Can also occur on the petiole, stem, base of flowers, petals and flower crown. The leaves are attacked will easily fall.

2. Leaf rust
Cause: leaf rust disease caused by a fungus (mushroom) Phragmidium mucronatum (Pers. ex Pr.) Schlecht.
Symptoms: leaf rust disease in the form of spots reddish orange on the underside of the leaf, the leaf upper side there are patches of angular reddish color. Heavily infected leaves will easily fall (fall). Non-chemical Control: This disease handlers trimming leaves hospital and then destroyed.

3. Wheat mildew
Cause: The fungus Oidium sp. Symptoms: marked by the emergence of flour / white coating on the surface of the lower and upper leaves. Leaves / plant parts are affected will change color from green to reddish, yellowish gradually and eventually leaves fast fall (autumn). Non-chemical control: pluck the leaves are attacked to be destroyed and farm hygiene (sanitation). Chemical control: are chemically treated by spraying fungicide sulfur, or contain active ingredients Pirazifos.

4. Swollen base of the stem
Cause: The bacterium Agrobacterium tumefacien (EF Sm et Town.) Conn. Symptoms: swelling at the base of the stem near the soil surface, so the plants become stunted and eventually die. Non-chemical Control: revoke the sick plants to be destroyed and when the plant maintenance (pruning) using sterile. Chemical Control: sprayed by that contain active bactericide Streptomycin or Oksitetrasikin.

5. Mosaics (pinto)
Cause: This disease arises due to a virus attack (Rose mosaic virus) (Rose mosaic virus). Symptoms: The leaves turn yellow and mottled, the bones of their leaves like nets. Control: done by planting healthy seedlings, maintenance intensive crops, spraying insecticides to control insect vectors, and unpack (eradication) of sick plants to be destroyed to prevent spread to other plants.

6. Leaf spot
Cause: The two pathogens, namely fungus Cercospora rosicola Pass. and Alternaria sp. Symptoms: cercospora attack brown spots on older leaves, whereas Alternaria spots blackish color. Non-chemical control: done by cutting / picking the leaves are a pain to be destroyed and maintain the cleanliness of the garden (sanitation). Chemical control: chemically sprayed fungicide containing the active ingredient Copper.

7. Mushrooms poison
Cause: The fungus Corticium salmonicolor (Berk. et Br.) Tjokr. Symptoms: There is red crust on the trunk, and slowly the stem will rot and die. Non-chemical control: skin peel and curry plant parts that hurt, then smeared paint / tar, can also cut the stems at the same time the infected hard.
Chemical control: spraying fungicide that contain active Tridemorf.

Listen

Read phonetically

8. Decay rate
Cause: The fungus Botrytis cinerea Pers.Fr. Symptoms: flower bud that has opened the brown rot, and berbintil-black nodule.Non-chemical control: wrap the flowers begin to bloom with oil paper bag / plastic and  post-harvest handling of flowers as possible. Chemical control: spraying a fungicide that contain active Benomil.

9. Physiological diseases
Cause: lack of nutrients (a deficiency), lack of Nitrogen, Phosfor, and Potassium.
Symptoms: nitrogen deficiency causes leaf color hujau-young (pale) yellow and plant growth slows (dwarf). Phosfor deficiency causes plants to become thin and stunted, while less potassium leaves to dry out along the edge / edges. Control: balanced fertilization, particularly elements of N, P2O5, and K2O fertilizers or sprayed leaves that contain high macro element in accordance with the symptoms of deficiency.