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Seed industry

Protection of cucumber seed plants from pests and diseases

Diagnosis and methods of accounting major diseases


The correct definition of the causes of the disease - the most important link in the whole system of protective measures . Table 12 shows signs of disease, the most common in the plant seeds of cucumber . Proposed keys allows you to quickly identify a particular disease, except when the diagnosis requires the use ofspecial methods of investigation (microscopic identification of the pathogen, serological tests, etc. . ) .

Table 12 . The characteristic features to determine the major diseases of cucumber seed plants

Signs of

MosaicBactoFalse Flour - a flock of dewNecrosisBrown spotGloeo444sporium444lagena444riumMacro argumentAskoNoninvasive infections attractive burnsFlour flock dew

1 .Leaves mosaic painting

+

2 . For leaf spot

+

+

+

+

+

+

+

-f

2 . 1 angular Spot

+

+

2 . 1 . 1 spots without plaque, the affected tissue falls

4

2 . 1 . 2 spots with grayish-purple bloom on the lower side

+

2 . 2 Spots rounded or slightly angular

+

+

+

+

+

+

2 . 2 . 1 spots are small, often merging

+

+

2 . 2 . 1 . 1 Spots without pellicle

+

2 . 2 . 1 . 2 spots with dark patina

+

2 . 2 . 2 Spots large

+

+

+

+

2 . 2 . 2 . 1 Plaque as fine yellowish-brown pads

+

2 . 2 . 2 . 2 concentric Stains, plaque Black

+

2 . 2 . 3 spots very large, bright

+

+

2 . 2 . 3 . 1 spots on the fruit bodies in the form of black dots

+

2 . 2 . 3 . 2 spots irregularly shaped fruiting bodies are not available

+

3 . On leaves a white powdery coating

+

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