Damping off, alternaria leaf spot and ball blight also can cause serious damage to cotton in some years.

某些年份，立枯病、黑斑病和铃疫病也能引起较大的损失。

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Plantings of cotton bioengineered to produce its own insecticide against bollworms, a major cause of crop failure, sustained little bollworm damage until this year.

经过生物工程改造的棉花种植场可以生产自己的抗棉铃虫杀虫剂，而棉铃虫是造成农作物歉收的主要原因，直到今年，棉铃虫的危害都很小。

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To add separate carding and decrease cotton knots and fiber damage have long been focus of carding procedure.

增加分梳以减少棉结与纤维损伤，历来是清梳工序的主攻方向。

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The deluge has caused extensive damage to key crops - such as wheat, cotton and sugar cane - in a country where agriculture is an economic lynch-pin.

BBC: Pakistani president visits flood relief camp in Sindh