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Cold winter to impact Chinese agchem usage

Unusually low winter temperatures in China will impact on plant diseases and insect pests, reducing pesticide usage in the country this year, reports the Chinese Academy of Agricultural Science's Institute of Plant Protection. Low temperatures will have an effect on pathogens such as wheat rust ( Puccinia graminis tritici) and powdery mildew ( Blumeria spp). Spring temperatures will determine the level of impact. Locust eggs and bollworm larvae are likely to die when exposed to lower temperatures, the Institute notes. Harsh weather conditions will cut planted areas, potentially further lowering pesticide usage. From December 1st 2009 to January 1st this year, many areas of northern China saw temperatures drop to lows of -10°C, and several regions recorded the coldest winter on record.

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