What does ACHL mean in LONDON STOCK EXCHANGE

Asian Citrus is a disease of citrus trees caused by a virus. The virus, Candidatus Liberibacter asiaticus, is vectored by the Asian citrus psyllid (ACP), a small sap-sucking insect that feeds on plant sap. As the name implies, the disease was first seen in Asia and has since spread to many other citrus producing regions around the world.

Asian Citrus spreads when adult ACP lay eggs on a healthy tree. Upon hatching, nymphs emerge and feed on sap from the underside of leaves. From these feeding sites they excrete small volumes of honeydew which serves as an environment for sooty mold growth and provides nutrition for an alternate host plant species. When nymphs feed on infected plants, they acquire the virus and then move to another tree resulting in its spread from one location to another.

Some of the most common signs of Asian Citrus include yellowing or mottling of leaves, stunted growth, limb dieback and fruit drop. In some cases trees may also experience reduced flowering or even complete failure to flower or set fruit.

Effective management strategies involve both cultural practices such as removing any infected parts of plants and chemical applications in order to reduce populations of ACP that may be present in areas where citrus trees grow. Additionally, use screens or covers over outdoor plants can protect them from ACP infestation while selective pruning can reduce pest levels inside trees by making it more difficult for adults to access protected parts of plants where eggs can be laid.

Biological control agents such as predatory wasps have been developed for use against ACP in order to reduce their numbers without using chemical pesticides that can damage crops and surrounding ecosystems alike. Other insects used include thrips, ladybugs and lacewings which help keep pest populations down by preying upon eggs or larvae before they can do any damage to plants themselves.

Yes, warm temperatures combined with high humidity are ideal conditions for ACP reproduction which increases their population density and likelihood of spreading diseases like Asian Citrus further within a given area or region where susceptible plants may exist nearby. However cold temperatures may also cause harm if prolonged due to increased susceptibility among young larvae while damp conditions may lead to fungal infection through infection pathways such as wounds made after feeding on tree tissue.

Insecticides containing neonicotinoids such as imidacloprid should be avoided due to their negative effects on non-target organisms such as bees and other beneficial insects that help pollinate crops including citrus fruits themselves.