|Keywords:||鳳梨病害;防治;Diseases of pineapple;control||Issue Date:||Dec-2001||Publisher:||農業試驗所嘉義分所||Start page/Pages:||41-57||Source:||農業試驗所特刊第97號||Conference:||台灣鳳梨品種改良與病蟲害管理研討會專刊||Abstract:||
Till now, for more than 50 years, these diseases are described severe in pineapple cultivation, such as heart rot, black rot (Ceratocys tis rot) and fruitlet core rot or eye rot were caused by fungi; marbled fruit and pink disease, those were separately caused by bacteria Erwinia ananas and E. amaranthi. A severe viral disease of pineapple wilt caused by pineapple wilt virus during 1950 to 1970, and its vector were mealbug (Pseudococcus brevipes(CK11.). The most important physiological disorder in pineapple was black heart, which caused by low temperature before harvest in field or stored pineapple fruits in 6℃ low temperature condition, then raised to room temperature after harvest. Eighteen genus of nematode could infested the root of pineapple caused tumor or rot of root.
These diseases showed severe under different cultivated period of pineapple growing. At first, heart rot caused rot of seedling , then, pineapple after growing in fields, mealbug wilt seemed most severe. While harvesting of pineapple fruit, marbled fruit, pink disease, black heart and eye rot seemed severely. Black rot and black heart became severe at the stage of storage.
Integrated control of pineapple diseases were operated mainly in recent pineapple cultivation. Fertilizers, as nitrogen, phosphorus, and potassium, were used in an optimum ratio. Planting seedling for large distance between each other, alternating harvest period, growing on the slope for sunny etc, those items all included under integrated control methods. Only 80% of fosetyl-Al W.P. and 10% Ethoprop G. were recommented for chemical control of heart rot and nematode.
Many fungicide were screened out for chemical control of pineapple diseases in early 1950. However, those fungicide owing to high toxic or residue were refused and rejected by government. In the future, we need try new fungicide which with low toxic or residue for pineapple disease control.
|Appears in Collections:||植物保護系|
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