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Impact of the coconut mite (Aceria guerreronis Keifer) on the coconut industry in Sri Lanka

机译：椰子螨（Aceria guerreronis Keifer）对斯里兰卡椰子产业的影响

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The coconut mite (Aceria guerreronis Keifer) was first reported in Sri Lanka in 1997. Since then it has been a serious threat to the coconut industry. Feeding of coconut mites beneath the perianth of developing nuts result in scarring of the nut surface. In severe infestations, reduced nut size and nut malformation can also occur. A survey was carried out during 2003/2004 in five mite infested zones (MIZ) of Sri Lanka to assess the impact of coconut mite on various sectors of the coconut industry. The percentage of damaged nuts due to coconut mite was significantly different between the MIZ. There were also variations relative to nut size and shape. Irrespective of spatial and temporal variability, nut loss per mite infested palm was estimated to be15.9% per annum. A 2-3% slowing down in the growth of annual national coconut production was projected due to coconut mite infestation. The loss to the coconut grower, selling at the rate of SLR 15ut, was estimated to be Sri Lankan Rupee (SLR) 6240/ha(57.25 US dollar /ha) if the estate was mite infested. The de-husked weight and fresh husk weight of a coconut nut were also significantly different in relation to the mite damage and nut size and shape. From a randomly selected 10,000 nuts, the reduction of fresh husk weight was approximately 15% as a result of mite infestation, together with a loss of around 195 kg of desiccated coconut. All of the impact indicators varied significantly both spatially and temporally.
机译：椰子螨（Aceria guerreronis Keifer）于1997年在斯里兰卡首次报道。从那时起，它一直对椰子产业构成严重威胁。在发育中的坚果的花被下方喂入椰子螨会导致坚果表面结疤。在严重的侵扰中，还会发生坚果尺寸减小和坚果变形的情况。在2003/2004年期间，对斯里兰卡的五个螨虫出没区（MIZ）进行了一项调查，以评估椰子螨虫对椰子产业各个部门的影响。 MIZ之间，由于椰子螨引起的坚果受损百分比显着不同。螺母尺寸和形状也有所不同。不论时空变化如何，估计每只被螨侵染的棕榈的坚果损失每年为15.9％。由于椰子螨的侵扰，预计全国椰子年产量的增长将减慢2-3％。如果该庄园受到螨虫侵染，对椰子种植者造成的损失估计为斯里兰卡卢比（SLR）6240 /公顷（57.25美元/公顷），价格为15里亚尔/坚果。椰子坚果的去壳重量和新鲜果壳重量在螨虫危害，坚果尺寸和形状方面也有显着差异。从螨虫的侵扰中，从随机选择的10,000个坚果中，新鲜果壳的重量减少了约15％，同时损失了约195公斤的脱水椰子。所有影响指标在时空上都有很大的变化。

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