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HALO SYMPTOM [2 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2006-10-24

English

Subject field(s)
  • Plant Diseases
  • Culture of Fruit Trees
CONT

Yellow Sigatoka. The first symptom of the disease is the appearance of yellow-green specks in the lower surface of the third and fourth youngest open leaf. The specks elongate and expand into clearly visible brown streaks. As the streaks further increase in size, they become elliptical brown spots surrounded by a yellow halo that separate the spot from the normal green leaf tissue. When the spots become fully developed, the central areas turn gray, which eventually are surrounded by dark brown or black margin with yellow halo. The spots group together to form large areas of light brown, dried-up leaf tissues. This leads to premature dying of the leaves.

OBS

Symptoms of yellow Sigatoka ... typically develop more slowly than symptoms of black Sigatoka ...

OBS

Authors often use "Sigatoka disease" in reference to the "yellow Sigatoka disease" and will add "black" in front of "Sigatoka disease" if they don’t talk about the yellow one.

French

Domaine(s)
  • Maladies des plantes
  • Arboriculture fruitière
CONT

Les maladies foliaires causées par les Mycosphaerella spp. comprennent trois champignons ascomycètes apparentés : Mycosphaerella fijiensis, agent de la maladie des raies noires ou cercosporiose noire, M. musicola, agent de la maladie de Sigatoka ou cercosporiose jaune [...]

OBS

La «maladie de Sigatoka» fait habituellement référence à la «Sigatoka jaune» ou «cercosporiose jaune». Lorsqu'il s'agit de la cercosporiose noire, les auteurs vont habituellement parler de «Sigatoka noire» ou «maladie des raies noires».

Spanish

Save record 1

Record 2 1982-06-30

English

Subject field(s)
  • The Eye
DEF

Colored circle or circles around lights (...) seen by patients with glaucoma or with punctate lens opacities.

French

Domaine(s)
  • Oeil
DEF

(...) cercles brillants, souvent colorés (violet), que le sujet perçoit en regardant une source lumineuse.

CONT

Les halos colorés peuvent être la première manifestation d'un glaucome aigu.

Spanish

Save record 2

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