After a monoculture phase, it is becoming an unavoidable necessity to diversify perennial crops (cocoa, rubber, palm or coconut oil) in humid tropical areas. Why and when should these diversification processes take place? What type of planter is involved? What are the constraints to diversification? How do public policies and private actions interfere? The authors answer these questions through fifteen case studies, mainly located in Africa and South-East Asia, thereby providing a better understanding of the economies of family plantations and their recent changes.
Already a reference in this field, the guide updates and adds sixty new species and ninety photos, thereby offering a panorama of these garden, glasshouse and nursery pests. From rose aphids via all the butterflies and their caterpillars, it lists, details and illustrates everything you need to know: scientific classification, damage caused, distribution area, favourite hosts, biology and control methods.
It will win over entomologists, researchers, technicians, experts in horticulture and fruit growing and also amateur gardeners.
Rupicolous environments include rock faces, coastal cliffs, screes, bare and stony soils of proglacial surfaces and also quarries and ore dumps. This book presents the riches of rupicolous environments, explains how they operate as ecosystems in relation with their media, explains their heritage interest as a species repository and innovation laboratory, discusses how to restore them and advocates their integrated and sustainable management.