Tree Health monitoring

by Anna Brown, Forest Research

2. Environment Host Pests / Pathogens abiotic problems climatic damage deficiencies chemical damage cultural problems & mistakes virulent pests & diseases complex diseases diebacks declines Basics of disease diagnosis
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18. Summary • Symptoms on affected tree(s) • Distribution of symptoms on tree • Distribution of affected trees within crops • Presence of insects, fungal fruit bodies • Time when symptoms were first observed • Site-related factors which might be involved • Get new / unusual observations diagnosed!! Basics of disease diagnosis
19. Taking samples for detailed diagnosis • Collect material of concern and site details • Photographs are extremely helpful • What type of samples? - samples should contain junction of dead / live tissue - trees/shoots/branches should be in the process of dying, but not completely dead - package in plastic bags and send immediately as samples deteriorate in storage
20. ! Advice on photos • Take a range of pictures • Show the trees in context, then home in on the details of the symptoms that they display • “Postage stamp” sized photos aren’t much help but very high resolution pictures are a problem to Email & then store • Camera phones have the benefit of being handy but may not produce good enough images • But in the end – something is better than nothing at all……………
21. What equipment is needed?? Basics of disease diagnosis
22. Finally • The most important point is to act when you see something that doesn’t look right • There may be a simple explanation • If there isn’t, then getting the process of identifying the problem started quickly increases the chances of a speedy diagnosis • Problems that you ignore don’t go away, and some of them may come back to bite you in time! Basics of disease diagnosis
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