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POTENTIAL INFLUENCES OF MULTIPURPOSE TREE CHOICE IN THE DEVELOPMENT OF DISEASES OF ASSOCIATED CROPS IN AGROFORESTRY SYSTEMS: WHAT DO WE KNOW TODAY?

B. M. L. Bondole
Journal of Tropical Forest Science
Vol. 11, No. 1, Special 10th Year Anniversary Issue (January 1999), pp. 26-35
Stable URL: http://www.jstor.org/stable/43582512
Page Count: 10
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
POTENTIAL INFLUENCES OF MULTIPURPOSE TREE CHOICE IN THE DEVELOPMENT OF DISEASES OF ASSOCIATED CROPS IN AGROFORESTRY SYSTEMS: WHAT DO WE KNOW TODAY?
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Abstract

This paper is an attempt to put in perspective how a multipurpose tree can influence plant disease dynamics in associated perennials and annual crops. All trends discussed are based on observations made in various parts of the world and are not exclusive to any single species. Any combination of components in agroforestry systems can have beneficial or detrimental influences on plant disease dynamics. The objective of this paper is to bring awareness of potential beneficial or detrimental interactions, mainly how agro-forestry cropping systems can create suitable conditions for what is known as collateral infection on some major components of agroforestry systems. In this respect, the most important aspects to consider when deciding on the appropriate association (tree-crop) is the host-range of any pathogen to either of the components. In some cases, what may pass as only a minor disease to the less important component of the system may be detrimental to the more income generating component. In addition, the potential of multipurpose trees as breeding support for disease vectors, insects or nematodes, should be taken into consideration. Artikel ini bertujuan untuk mengetahui dalam jangka panjang bagaimana pokok pelbagai guna dapat mempengaruhi dinamik penyakit tumbuh-tumbuhan terhadap hasil tahunan dan pokok saka bersekutu. Semua trend yang dibincangkan adalah berdasarkan cerapan yang dijalankan di pelbagai tempat di dunia dan tidak mengkhususkan kepada spesies tertentu. Mana-mana kombinasi komponen dalam sistem perhutanan tani dapat memberikan pengaruh yang menguntungkan atau merugikan terhadap dinamik penyakit pokok. Objektif artikel ini ialah untuk memberikan pengetahuan mengenai potensi saling tindakan yang menguntungkan atau yang merugikan terutamanya mengenai cara-cara sistem perhutanan tani dapat mewujudkan keadaan yang sesuai, yang dikenali sebagai jangkitan sampingan, terhadap beberapa komponen utama dalam sistem perhutanan tani. Dalam hal ini, aspek paling penting yang perlu dipertimbangkan dalam menentukan sekutu yang sesuai (tanaman pokok) ialah julat perumah mana-mana patogen bagi tiap-tiap komponen. Dalam beberapa kes, apa yang dianggap penyakit minor kepada komponen yang kurang penting dalam sistem tersebut, mungkin boleh menyebabkan kerugian kepada komponen yang dapat menjana lebih banyak pendapatan. Di samping itu, potensi pokok pelbagai guna sebagai sokongan pembaikbiakan kepada vektor penyakit, serangga atau nematod perlu dipertimbangkan.

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