Pines are beautiful shrubs and trees, usually resistant and growing well in our climate. However, they can be attacked by diseases and pests. We advise how to recognizediseases and pests of pine , which will helpdescriptions of symptoms and photos of pine treesinfected by pathogens, and we also reveal proven methods for fighting diseases and pests on pine treesSee what is pine disease in your garden and how to help it!
Yellowing pine needles can cause both diseases and pests. Find out how to recognize them
Diseases of pine
On some pines, mainly of foreign origin,dangerous fungal diseases5-needle pines, mainly white pine, are attacked by white currant rust. On the other hand, three-needle pines and some two-needle pines are attacked by the fungus that causes pine shoot dieback.
Phytophthora
Chlorotic, yellow and then browning needles, which in consequence die, aresymptoms of a very dangerous disease of pine , which is phytophthora. High substrate humidity additionally enhances the development of the pathogen that develops in the substrate and infects the plant's root system and the base of the shoot. Affected pine hair roots are unable to properly absorb nutrients from the substrate, which causes the plant to gradually die.
Phytophthorosis - browning needles and rot of pine shoot base
After noticingthe first symptoms of this pine diseasewater the plants with a solution of the biological preparation Polyversum WP (3 treatments are performed every 3 weeks).Unfortunately, heavily infested pines must be removed. Remember not to plant any other plants in the place of infected pine or decontaminate the substrate first with fungicides, eg Magnicur Energy 840 SL or Proplant 722 SL at a concentration of 0.2% in the amount of 2-4 liters of solution per 1m² of substrate. Before planting new plants, add 10-20 liters of composted pine bark to the substrate, which will inhibit the development of the pathogen.
Armillary root rot
Anotherdisease attacking pine is armillary root rotSymptoms of the disease appear on dull needles that turn yellow, brown and gradually fall off, and at the base of the shoot around the entire circumference or in separate places the bark turns brown and dies and cracks alongside revealing wood. Under the dead bark, an empty space is created and air enters. The surface of the wood and bark showspatches of profuse white mycelium covering the entire circumference of the stem
The control of this pine diseaseconsists in watering the plants with the preparation Rovlar Flo 255 SC at a concentration of 0.2% at a dose of 1-4 liters per plant. If the infection is severe and the use of protective measures does not help, the pine should be removed and burned.
Numerous falling pine needles may be a symptom of the disease - pine rash
Pine bloom
Pine rash is a disease whose symptoms are visible on the needlesthroughout the growing season, because in spring and summer single spots appear on the needles. In autumn, we can observe characteristic yellow cross lines. The following year, in Aprilthe needles deform, turn yellow and fall down massivelyPathogen spores form on fallen needles that infect subsequent trees from September to November. After noticing the symptoms, do not allow the pine needles to be watered and wet.Fighting pine disease , which is rash, we have to use alternately two or three times every 14 days for plant protection products such as Topsin M 500 SC and Amistar 250 SC.
White currant rust
The white currant rust attacks in particular the five-needle pines. It can be recognized byyellowing of the needles and the characteristic orange-rusty color of the bark at the base of the needlesIn the following year, yellow-white bubbles appear at the spots, from which the fungus spores transfer to the black currant. In the place of dead tissue, the bark dries up and cracks, and becomes covered with copious resin secretions. An open wound forms over time and clusters of sporulation emerge around it every spring.
White currant rust
The prevention of white currant rustconsists mainly in not planting blackcurrant in places where five-needle pines grow. Infected shoots should be cut and burned, and the cut areas should be lubricated with garden ointment with the addition of fungicide.
Pine shoot dieback
The dark red spots saturated with resin on the pine shoots, which crack, revealing the wood, aresymptoms of pine shoot dieback , which consequently lead to the formation of crayfish and the death of the entire shoots. Needles on infected shoots turn yellow and then turn brown, dying off. Often resin-stained needles remain on the shoots, taking on a grayish color over time. In rainy weather, spores are transferred to neighboring plants and infect them most often at the site of damage to the shoot.Sick pine shoots should be cutbelow the infection site and sprayed with Topsin M 500 SC or Rovral Flo 255 SC.
Pests of pine
Pine cupola
By feeding on the plant, the pine moth causesmassive yellowing and dropping of the needlesThe fight against this dangerous pine pest should be started already in the early spring, by applying prophylactic paraffin oil spraying, which covers the wintering stages of pests with a coating that makes breathing difficult for insects, causing them to die.The recommended oil preparations are: Promanal 60 EC (contains pure paraffin oil) and Emulpar 940 EC (contains blackberry oil, the action of which against pests is identical).
The pine moth feeds on the underside of the needlessucking up the cell contents, which causes widespread yellow spots to appear on the needles. At the turn of April and May, the larvae turn into dark red females that lay eggs on young shoots. The larvae hatch in turn from the eggs and feed on the May shoots, as a result of which the needles turn brown and fall off. In summer, after aphids are observed, spray with a preparation from the group of pyrethroids, eg Karate Zeon 050 CS or Karate Gold Thujas and Conifers.
Bura honey pot
Another pine pest that appears on young May growths of black pine, less often dwarf mountain pine, isaphid red pineappleAs a result of its feeding, the needles turn yellow and fall off. In April, larvae hatch from the wintering shoots on the bark, which should be combated by spraying with Karate Zeon 050 CS.
Pineapple leaf roll
The pineapple scroll is a butterfly whose larvae feed inside young pine shoots, causing them to dry and bend in a characteristic way. These caterpillars on the pine tree first pass the base of the needles, then bite into the buds, where they forage until late autumn and hibernate to reach the apical shoot in March. Caterpillars mature in June, butterflies appear at the end of the month after pupation.The control of the pine pest , which is the pine leaf tortrix, is to remove drying shoots by the end of June, before butterflies fly out and lay eggs on young shoots. During the departure period,spray the pine with Karate Zeon 050 SC , which destroys young caterpillars starting their feeding.
Symptoms of feeding of the pineapple turtle
Borecznik ore
Anotherpest of pine that causes bare stems is the boron Hymenoptera larvae have been feeding since May and completely eat the needles. At the turn of July and August, they surround themselves with a cocoon in which they pupate. Adults appear in September. Females lay their eggs under the skin of the needle where they hibernate. The larvae that hatch in May start feeding on the needles of last and this year.This pine pest is controlled by sprayingimmediately after observing the larvae with Karate Zeon 050 SC.
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MSc Eng. Joanna Białowąs
