biopreparados.es

Aster yellows

Aster yellows

Bacteria

What is an opportunist?

An "opportunist" is a population (fungi, bacteria, insects…) that takes advantage of a favourable environment to settle in, multiply and feed on it. It often develops when the natural defences of the affected organism are weakened — for genetic reasons or linked to context (water stress, deficiencies, nutritional imbalances, overcrowding…). This is typically the case in monocultures, where a single host plant, uniform and present in large numbers, offers ideal ground for it to spread.

Identification key : Phytoplasmas and phloem bacteria (Damage and symptoms on the host)

Scientific name : 'Candidatus Phytoplasma asteris'

Other names : AY phytoplasma

Phytoplasma transmitted by leafhoppers, mainly Macrosteles quadrilineatus, with a very wide host range. It causes yellowing, stunting, proliferation of thin shoots and green, distorted flowers (virescence and phyllody) in carrot, lettuce, celery, echinacea and many ornamentals; carrot roots become hairy and bitter.

Crops affected : Bean, Carrot, Celery, Corn, Echinacea, Flowers (cut & garden), Grapevine (36 varieties), Lettuce, Poplar, Strawberry

Source : Candidatus Phytoplasma asteris (PHYPAS)[Overview] — EPPO Global Database — EPPO

This page lists the bio-preparations in the collection that other references associate with this opportunist: Aster yellows.

Warning: the associations between recipes and opportunists come from other references (traditional practices, publications, user feedback). They are neither a recommendation nor a claim of effectiveness. There is no certainty regarding the preparation, application and use of these bio-preparations. See the regulations

No published recipe is associated with this opportunist yet.

See also

Crops

Airén Albariño (Alvarinho) Celery Barbera Bobal Cabernet Franc Cabernet Sauvignon Chardonnay Chenin Blanc Poplar Clinton Echinacea Flowers (cut & garden) Bean Strawberry Grenache (Garnacha) Gewürztraminer Godello Herbemont Isabella Jacquez Lettuce Corn Malbec

Opportunists of the same crops

Stolbur (bois noir) Chilli thrips Brown marmorated stink bug Pink hibiscus mealybug False codling moth Xylella fastidiosa Vine mealybug Redbanded thrips Black rot of grapevine Esca of grapevine Grape phylloxera European grapevine moth

← Referenced opportunists