1. Introduction 2. Coconut (Cocos nucifera L.) 3. Arecanut (Areca catechu L.) 4. Oil palm (Elaeis guineensis L.)  5. Cocoa (Theobroma cacao L.) 6. Cashew (Anacardium occidental L.) 7. Rubber (Heavea brasiliensis L.) 
8. Betel Vine 9. Tea (Camellia sinensis L.)10. Coffee (Coffee arabica L.) and (C. canephora L.)