Sunday, December 13, 2009

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edema

Le fisiopatie sono le malattie di origine ambientale.

 

Fra i gerani l’edema è quella più widespread. This physiological condition is a translucent appearance of small pustules, which can heal and become brown in color, are located on the underside of the leaf, especially in areas around the ribs and also on petioles and branches. May form blisters that appear very similar as large lesions, the leaves may turn yellow and fall off the plant. The cause is too abundant in watering, soil that does not dry sufficiently, excessive nitrogen fertilization, high humidity and poor light, is born, especially during the winter dormancy, and then continues during the summer. Even if the swelling does not danneggia gravemente la salute delle piante queste assumono un aspetto sgradevole. La soluzione è quella di bagnare più frequentemente ma con quantità inferiore, sospendere le fertilizzazioni azotate per un mese per poi riprenderle gradualmente, porre i gerani in vaso con un drenaggio di palline di argilla alto 5cm. I danni causati da questa fisiopatia  possono essere confusi con quelli causati dai tripidi.

 

Informazioni supplementari

Macchie senza pustole trasparenti, color ruggine come scabbia, è una fisiopatia conosciuta
come ‘’Il sughero’’. La causa è la stessa, troppa acqua. E’ comune nelle piante più old who are left without protection in the winter, cold and rain. The recommended solution is the same for edema.

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feuille-pelargonium-cloque1

Sunday, December 6, 2009

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Saturday, December 5, 2009

Short Gold Metallic Dress

The Xanthomonas campestris pv. Pelargonium

This disease develops in hot, humid and spreads via infected material and water splashes. We observe on the leaves yellowing and browning of triangular shape, with the tip of the triangle facing the inside of the leaf, starting from the edge. These yellowing and browning can be confused with Botrytis Xantomas. Another symptom can be folded down like an umbrella, preferably the latter is observed on older leaves and may be confused with lack of water and a temporary wilting. Yet other symptoms may be small round spots of dark brown because of bacteria transported from leaf to leaf by splashing water or rain. The shaft is in the area close to the neck area dark brown. The Xanthomonas campestris pv. can infect Pelargonium zonal geraniums (Pelargonium x hortorum), Imperial geraniums (Pelargonium domesticum), geranium (Geranium sanguineum) ivy geraniums (Pelargonium peltatum). The latter is very susceptible to bacterial disease and develop symptoms similar to a nutritional deficiency or an attack of mites. In the later stages of the disease has the death of the plant. You should remove the infected plants and administer products based on copper at 2-3% a week, avoid sprinkler irrigation.

Below place the photos so they can better recognize the disease.













Yellowing

browning

on older leaves.


as I wrote in the article is easy to confuse with Botrytis Xanthomonas

Xanthomonas

Botrytis


ivy geranium (Pelargonium peltatum).
The latter is very susceptible to bacterial disease and develop symptoms similar to a nutritional deficiency or an attack of mites.



Still other symptoms may be small round spots of dark brown because of bacteria transported from leaf to leaf by splashing water or rain.


hederae
Xanthomonas pv. pelargonii (formerly X. campestris pv.
Pelargonii)

hederae
Xanthomonas pv. pelargonii (formerly X. campestris pv.
Pelargonii)

hederae
Xanthomonas pv. pelargonii (formerly X. campestris pv.
Pelargonii)


hederae
Xanthomonas pv. pelargonii (formerly X. campestris pv. Pelargonii)



Xanthomonas hortorum pv.
pelargonii chlorosilanes and necrosis
's a geranium di foglia
ivy infected by Xanthomonas hortorum pv. Pelargonium.

Piera