Juniper rustis a disease caused by various species of fungi of the genus Gymnosporangium.Rust symptoms on juniperare thickenings and jelly-like orange sprouts on juniper shoots. This disease is very dangerous because it is easily spread from junipers to other plants, such as pear, hawthorn and rowan. Therefore, it absolutely requires combating. See how to conductjuniper rust controland recommendedjuniper rust sprays
Juniper rust - jelly-like sprouts on the shoot
Photo provided by our reader, Mr. Lech. Thank you!
Juniper rust - symptoms
Recognizing the symptoms of juniper rustis relatively easy as they are very specific. In spring, on juniper shoots, often on sections up to 25 cm long,a white coating of mycelium appears. Numerous yellowish rust aggregates can be observed on its surface, which turn brown with time. Later in the development of the diseasethe site of juniper rust blight begins to resemble jelly-like orange shoots that look like dripstones , which is clearly seen in the photos with juniper rust symptoms.
The parts of the juniper shoots above the affected area turn gray and stop growing. They usually die in summer. Such momentum cannot be saved. Sometimes, however, the process takes many years. The mycelium in the form of a thickening on the juniper shoot winters and every year produces spores that infect other plants.
The orange, gelatinous growths visible on the juniper shoots release mycelium spores plants such as rowan, hawthorn, cotoneaster, quince and pear.
Such orange tongues growing out of juniper shoots are also a symptom of rust
Fig. depositphotos.com
The leaves of the affected deciduous plants first develop yellow, then red spotswith black dots in the center. Shortly thereafter, yellow-brown or brown rough spots appear on the underside of infested leaves, and over time, orange or red outgrowths appear on the underside of the leaf. The disease is of greatest concern to gardeners and gardeners in pear cultivation, where it causes a well-known disease called pear rust.
Another photo of juniper rust symptoms
Fig. segars, forum.PoradnikOgrodniczy.pl
Given the two-home nature of rust (requires two different host plants to fully develop) and the common occurrence of pear trees in gardens, the disease is also referred to aspear and juniper rust,juniper and pear rustlubjuniper and rosacea rust
Juniper rust - fight
We promote the spread of juniper rustby planting ornamental junipers (mainly varieties of Sabina juniper) near other host plants, i.e. rowan, hawthorn and, above all, pear trees. Therefore,avoid planting junipers near the crops of pear, rowan and hawthorn , remembering, however, that avoiding such a combination within our own garden, or even neighboring gardens, does not help much, because rust can spread with the wind over very long distances (up to several hundred meters).Avoiding growing junipers near pear trees therefore reduces the risk of contracting the disease but does not completely eliminate it
Juniper rust
Fig. mirko100, forum.PoradnikOgrodniczy.pl
Juniper shoots with orange thickening and growths should becut below the observed lesions Such a rush will, in time, be doomed to wither away. It is best to burn the cut plant parts to completely destroy the disease. If we are forbidden to burn, bury the sick fragment of the shoot as deeply as possible in the ground.The place of the cut on the plant should be protected by applying garden ointment with the addition of fungicide.
Cut out shoot of juniper with growths signaling rust
Fig. depositphotos.com
Remove shoots and leaves with signs of rust in other host plants , which in our gardens will most often apply to pears (fungus spores released from pear leaves attack junipers again). All infected plants should also be sprayed withanti-rust spray
Juniper rust - spraying
After cutting juniper shoots with visible signs of rust, spray them.For spraying against rust on juniperpreparations such as Saprol Hobby long-acting and Scorpion 325 SC are recommended.The entire plant should be sprayed thoroughly, spraying 2-3 times every 2 weeks.
The anti-rust juniper spraying should be repeated every year in springas soon as the ambient temperature exceeds 18 ° C.
Spray rust-affected pearsand Magnicur Gold (formerly known as Zato 50 WG). Pear rust spraying is carried out from the pink bud stage until the end of flowering (up to a maximum of 30 days after the petals have fallen). Remember to observe the grace period (the period from spraying to the date of harvesting the fruit).
"border=0
Additionally, both pear trees and junipers can be sprayed with the natural preparation Biosept Active, which strengthens the plants and makes them resistant to diseases. We spray Biosept alternately with the aforementioned fungicides, and additionally we can continue them throughout the growing season, repeating it every 2 weeks.
