Spp.

FL Pfleger and SL Gould

2012

regents of the University of Minnesota. All rights reserved. Many plants are susceptible to bacterial leaf diseases, especially

in dark winter months. Common symptoms include leaf spot,

plant diseases and decay. Bacterial diseases are limited >> << leaves often can be controlled. What is bacteria? Bacteria

microscopic unicellular organisms that reproduce by dividing

twice. This may occur as often as every 20 minutes,

, or it may take several hours. Some faster multiplication

species, one bacterium can cause more than 47 million descendants

at 12:00. About 170 species of bacteria

can cause disease on leaves of plants. Bacteria can not penetrate

directly into the tissues of plants, but they have to go through wounds or natural >> << openings like stomata (pores for air exchange) in the letter.

Bacteria normally present on the surface

factory and will only cause trouble condition

favorable for their growth and reproduction. These terms and conditions >> << include high humidity, overcrowding and poor air circulation around plants.

Spraying plants provide film of water on the leaves >> << where bacteria can multiply. Too much, too

little or irregular watering plants can put under stress and

may predispose to bacterial infection. Other conditions that produce stress

include low light intensity, temperature fluctuations,

poor drainage of the soil is too small or too large a pot, and insufficient >> << or excess nutrients. Bacterial diseases are usually dominated by

deciduous plants in the winter when light intensity and duration

reduced. During this time the plants do not grow

actively and easily he said. Different types of bacteria affect plants

differently. Plant symptoms include tip burn, leaf spot

plant diseases, rot, weakening or complete collapse of plant tissues. The most severe and destructive disease

, deciduous plants caused by bacteria belonging to the genera Erwinia, Xanthomonas

and Pseudomonas. These bacteria infect

many plants, some of which are listed below together with the general >> << symptoms. However, many plants suffer from bacterial diseases

is not talking. Control measures for all bacterial diseases leaves

foliage plants are the same and will be discussed later in this Bulletin >>. Figure 1 <<. Bacterial leaf spot and Tipburn (

Xanthomonas satrezMz Faith. Dieffenbachiae) on a sheet of Dieffenbachia.

Note the yellowing leaves of the province. The older >> << infected area was brown. Bacteria were isolated from rectangular >> << reduction letter. Sensitive plants >> << Filodendron SPP. ,

Dieffenbachia SPP. ,

Anthurium SPP. And others. This disease >> << most active in hot, humid conditions. The most common symptom is yellowing

along the edge of the sheet at the beginning of the tip sheet. In hot and humid conditions, the edge of the letter can be reddish brown

instead of yellow. Early symptoms of infection are small, translucent

point, which then turn yellow. Centers

older lesions often turn brown. As the disease progresses, affected leaves turn yellow and

fall from stem cells. Figure 2. Bacterial leaf spot (Pseudomonas

cichorii) to stsyndapsus gold (Pothos). Yellow halo

you can see around the spots on the underside of leaves of the Pothos. Susceptible plants include golden Epipremnum (Pothos)

Filodendron panduraeforme (Fiddleleaf Filodendron)

ahlaonemy SPP. (Chinese Evergreen)

monstera and SPP. (Split-list Filodendron).

Symptoms are varied and may include brown-black lesions, light and strattera 40mg dark areas on

Epipremnum golden leaves, and yellow halo around the affected area

on monstera Deliciosa goes. (Xantomonas SPP).

Susceptible plants include synhonium SPP. ,

Ahlaonema roebellinii (often called Schismatoglottis), and possibly other

ahlaonemy SPP. (Chinese Evergreen). Synhonium SPP. Most bouts of this bacterium. Symptoms include translucent >> << lesions on the tip sheet and along the edges of leaves. Losses can >> << elongated and extend into the middle letter. Losses

dark green at first, then turn yellow and eventually turn brown

when dead. Lesions are often surrounded by bright yellow >> << halo, which separates it from the healthy part of the letter. White

flakes dried bacterial exudate often even on older >> << lesions on lower leaves. (Erwinia

chrysanthemi This disease affects many plants, including

ahlaonemy SPP. (Chinese Evergreen)

Dieffenbachia SPP.,

Filodendron SPP., A

synhonium SPP . Bacteria attack

some plant system (internally), especially

Dieffenbachia SPP. symptoms of systemic infection are yellowing of new leaves,

fading, and soft, stinking stem rot. air distribution> ;> << this bacterium can cause infection of leaves. Symptoms may appear as

fast, mild collapse letter on

Filodendron SPP., defined >> << leaf spots on

, synhonium SPP., or all of these symptoms on

<< selloum Filodendron. >> Erwinia chrysanthemi grows

best in warm to hot, wet and humid environment. attack these bacteria

often leads to death of leaves of plants (Xanthomonas

satrezMz Faith hederae These bacteria attack

English ivy, Hedera

spiral leaf spots

light green and transparent, with reddish edge ...

senior spots turn brown or black. stem leaves are black and shriveled.

This decay can reach branches and woody stems, and some ulcers

can be seen. Table 1 . more susceptible plants. and signs of bacterial diseases Many bacteria are limited to

on the leaves of plants can be controlled, however, prophylaxis should be

to ensure the plants to the light conditions that are optimal

for their growth. . Sun loving plants should receive full sun, and the rest

should be placed near the east window or given more

light. Avoid plants where

is high humidity, crowding, or poor air circulation . Do not mist plants and avoid wetting foliage when watering,

as bacteria need water to multiply and spread to healthy leaves. Water plants according to the recommendations, be careful and do not

surface them. Proper watering, transplanting every 6 months to 1 year

in fresh sterile soil, fertilizer every 8-12 weeks, during >> << infection in the spring and summer, and control insect

keep plants healthy and reduce the possibility> > << infection by bacteria or other organisms of the disease.

If the plant is infected by bacteria, the following suggestions

could help stop the spread of infection. Ensure

are optimal for plant growth, as described above.

Isolate sick plants and prune the affected leaves, but avoid excessive handling >> << diseased plants. If more than one-third of the plant

is a part, cut the leaves infected over time as

remove too many leaves at one time put the plant under >> << to further stress. Treat scissors before each immersion reduction

them in freshly prepared solution of 1 part Chlorox or bleach Hilex

and 9 parts water. If the disease is systemic and spread throughout the plant >> << that affect stems and leaves, plant

can not recover. We recommend destroying the plant to prevent the spread

bacteria, plants healthy. F L. Pfleger,

Professor S. Gould, assistant scientist

Plant Pathology Prepared by Educational Communications and Technology Services, University Extension

Minnesota. According to the American Disabled Act, this material is available in alternative formats. Please contact the University of Minnesota Extension office or the Extension Store at (800) 876 -8636.