CHERRY DISEASES
A-Bacterial Diseases

1-Bacterial canker:

The causal organism:             Pseudomonas syrinigae PV. Syringe.

Disease symptoms:

This bacterium causes cankers, gummosis, and shoot blight. Sunken lesions appear in the spring with gummosis. Craks and Cankering follow, curled, and withered. Wet spring weather can Result in shoot blight and a semen angular leafspot.this is usually only a problem in young orchards.

Control:
Use COBOX 3001100L.W

 (Two time through growth season)

1^st on October.

2^nd on January.

2-Crown gall:

The causal organism:             Agrobacyerium tumefactions

Disease symptoms:

Warty tissue masses or galls may form on the roots, at the root collar, or anywhere on the stem. The leaves colors turned to pale Yellow.

3-Shot-hole or Black leaf spot:

The causal organism:             Xanthomonas pruni.

Disease symptoms:

This bacterium also attacks peach and plum. The infected tissue dries up and falls out leaving a one-eight inch diameter hole.

It also causes a canker and gummosis of the stem.      

B-Fungal Diseases

1-Witches Broom:

The causal organism:             Taphrina  cerasi.

Disease symptoms:

This fungus cause's large number of irregular small branches this fungus causes large numbers

To develop on twigs and larger branches forming a witches broom. Blossoms develop and the normal branches.

Large numbers of broom may eventually kill a tree.

2-Black knot:

The causal organism:             Apiosporina morbosum .

Disease symptoms:

Black knot is a very conspicuous and common disease that is also found on apricot and plums. Large, rough black galls form on the twigs. Twigs may die beyond the galls.

3-Brown rot:

The causal organism:

                                 Monilinia fructicola. 

                                     Monilinia laxa.

Disease symptoms:

These fungi cause blossom blight, twig blight and fruit rot. Fruit surface completely covered with the spores of fungus.

Control:
                   Use one of the following fungicides.

KUMULUS.S         300g/100L.w

BELLIS                   30g/100L.w

4-Mushroom root rot:

The causal organism:             Armillaria mellea.

Disease symptoms:

The fungus causes defoliation, dieback and death. It can enter at wounds and root, and can spread through

The ground to neighboring plants. It rots roots, collar and butt and is most dangerous to already weakened trees.

5-Ruts:

The causal organism: Tranzschelia discolor.

Disease symptoms:

Rust also occurs on peach and plum. Yellow spots appear on the upper leaf surface with reddish pustules filled with spores on the lower surface. It can cause premature leaf drop lowering             Tree vigor.

Control:

                        Use one of the following fungicides.

                        BELLIS              30g/100L.w

                        AMISTAR         40cm/100L.w

C-Post harvest Diseases of cherry

1-Alternaria rot:

The causal organism:   Alternaria spp.

Disease symptoms:

The fungus cause dark brown to black, firm, and slightly moist the affected area appears as a spot on the surface of the fruit an May be covered with olive-green spores and with strands of mold the rotted tissue can be readily separated from the surrounding flesh.

The fungus is widespread in naturu, entering the fruit through cracks or wounds.

2-Blue mold rot:

The causal organism:   Penicillium expansum Lk.ex.thom.

Disease symptoms:

First appears as a circular, flat, light brown area. The affected tissue is soft and watery. As the rot develops, TheSkin cracks to reveal small, whit tufts of mold. Under humid conditions, the mold grows producing a crop of bluish-green Spores. It is particularly common in fruit that has been exposed to rainfall or high moisture conditions.

3-Rhizopus rot:

The causal organism:     Rhizopus spp.

Disease symptoms:

Rhizopus rot is one of the most serious postharvest diseases of cherries.

In faction usually occurs after harvest and enters the fruits through cuts cracks or bruise.