Karakteristik
Tidak disebabkan oleh patogen atau mahluk hidup
Non infectious disease, penyakit tidak menular
Bersifat khusus dan tidak mudah dikenali
Timbul bersama gejala lain
Berat dan ringannya penyakit tergantungseberapa besar penyimpangan dari keadaannormal/optimum
Diperlukan pengetahuan silvika, silvikultur, keharaan dan kondisi lingkungan
PENYAKIT ABIOTIK
DIAGNOSIS
Nutrient Deficiency
Water stress
Over Temperature (drought)
Fire
Ice melted disaster
Water excessive
Animal destruction
Wind break
Effect of media
Sometimes roots develop in an unfortunate position, choking off other roots or the base of the stem as they develop. This is especially common on planted seedlings. It is made more likely by growing of seedlings in containers or close cultivation of the soil.
Girdling Roots (tergenang, solumdangkal)
2. Forest Disease Management
Detection RecognitionAppraisalWhat type of management is appropriate?
B. Disease Management Strategiesa. Silviculturalb. Chemical c. c. Biological d. Geneticse. Quarantine and inspectionf. Passiveg. Increasing pathogens
ClearcuttingPruningThinningSanitation inoculumremovalSpecies selectionFertilizationPrescribed fireAvoidance
Silvicultur technique
Soil fumigation in nurseriesBorax stump treatment for annosumroot rotHerbicide or growth regulator mistletoeInjections vascular wiltsFoliar spraying Xmas trees
CHEMICAL CONTROL
Bological controlCompetitionDecay fungi in stumpsTrichoderma-Phlebiopsis gigantea for H. annosum(Rotstop)
Protection -mycorrhizae
Genetics
Breeding for resistanceBetter for introduced pathogens than for native onesWorks well for rustsNot as effective for root diseasesd.
To prevent new pathogens and pests from being introducedWhite pine blister rust, Port Orfordcedar root disease, Dutch elm disease, Sudden oak deathMany pathogens come in on infected soil or plant material (APHIS Animal Plant Health Inspection
Service of USDA)Transporting fumigated seeds is best
QUARANTINE
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