recognition and interpretation of symptoms and damage Boa, Eric creator Food and Agriculture Organization of the United Nations text it 2003 monographic eng

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vi, 49 p. : ill. Summary: Insect pests and diseases routinely affect the health of trees, and major outbreaks can have catastrophic environmental and economic impacts. The effective management of all tree health problems depends on their early detection. This guide provides 140 photographs of symptoms from more than 50 tree species to be used as a basis for demonstrating the effects of pest (biotic) and non-living (abiotic) influences. E R Boa ; Food and Agriculture Organization of the United Nations. ბოტანიკა მცენარეთა დაავადებანი ხეების დაზიანება 632 9251050201 9789251050200 180430 20180430163917.0