夏橙果皮褐污斑形成原因及防治方法

针对江永县夏橙采前褐污斑问题，笔者于2010-2013年进行了研究。结果表明，夏橙褐污斑形状主要有6种、颜色主要有6种；病原主要是缺素、低温、早衰，少部分是病虫害；田间发生有3个高峰期，发生危害程度与品种、果实品质、温湿度高低及变幅、管理水平、成熟度相关；选择适宜品种、产地环境、脱毒苗木及接穗，防止果实早衰，适时采摘，可控制夏橙褐污斑。

Valencia orange peel and Brown stained formation reason and prevention method

Aiming at the problem of brown blotch Jiangyong County Valencia orange production, the author conducted research in 2010-2013. The results show that, the Valencia orange brown stain shape, there are mainly 6 kinds of color, there are mainly 6 kinds of; pathogen is mainly deficiency, low temperature, premature aging, is a small portion of plant diseases and insect pests; occurrence has 3 peak periods, the occurrence and damage degree and variety, fruit quality, temperature and humidity and low amplitude, management level, maturity related; choose the appropriate species, habitat environment, virus-free seedlings and scion, prevent fruit senescence, timely harvest, can control the summer orange brown stain.