菠萝病害问题

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蚧枯萎病 在种植菠萝的任何地方,蚧枯萎病都可能成为主要问题.此病的发生与菠萝灰粉蚧(Dysmicoccus neobreuipesBeardsles)和菠萝粉蚧(D.brevipesCockerell)有关.虽然此病的确切起因还不知道,但最近有在枯萎的植株上发现病毒颗粒的报道.许多国家对此病的防治工作做得很差.由于菠萝的无病繁殖以及无症状带病种苗向新种植区调运,蚧枯萎病一旦发生就难以防治.近几年,在夏威夷由于对伴随粉蚧的田蚁的有效防治,从而减少了其对粉蚧天敌的干扰,蚧枯萎病已不再成为问题.夏威夷三种重要的蚂蚁种类是;大头蚁(Pheidolemegace phala Febrjcius)、阿根廷蚁(Irid-omyrmex humilis Mayr)和火蚁(Solen-opsiegeminata Fabricius).蚂蚁的防治是用2.24公斤(0.3%有效成分)/公顷灭蚁灵诱饵和2.24公斤有较成分/公顷七氯(heptachlor)喷撒. Kurafate Fusarium Wilt may be a major problem anywhere in growing pineapples, and the disease is associated with Dysmicoccus neobreuipesBeardsles and D. brevisocke Cockerell. Although the exact cause of the disease is also However, recently, there are reports of virus particles found on withered plants, and many countries have done very poor job in prevention and control of this disease. Due to the disease-free reproduction of pineapples and the transfer of asymptomatic diseased seedlings to new planting areas, Fusarium wilt is difficult to control in the event of it. In recent years, scale fusarium wilt has ceased to be a problem in Hawaii due to the effective control of field ants associated with mealybugs in Hawaii, thus reducing their interference with natural enemies of mealybugs. Of the ants are Pheidolemegace phala Febrjcius, Irid-omyrmex humilis Mayr and Solen-opsiegeminata Fabricius. Ant control is made with 2.24 kg (0.3% active) / ha mirex Bait and 2.24 kg have more components per hectare of heptachlor spray.
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