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黄岩县处在浙江东南沿海,属中亚热带气候,春夏高温多雨,桔园杂草生长繁茂,与桔树、苗木争夺水肥激烈;同时杂草又是多种病虫的中间寄主。为了清除杂草,提高柑桔产量,并为化学除草进一步提供依据,对黄岩杂草进行了初步调查。 一、桔园杂草的一般分类 根据杂草对生产造成的危害程度及防治的难易,可分为良性和恶性杂草。易被农业措施或化学除草剂所根除的称一般杂草或叫良性杂草。所谓恶性杂草是指在繁殖、成熟期、自然落粒、休眠及生长等生物学特性方面有十分广泛的适应性,分布面广,受害面
Huangyan County is located in the southeastern coast of Zhejiang Province and belongs to the sub-tropical climate. It is hot and rainy in spring and summer. Lush weeds in the orange orchard are growing vigorously. There is fierce water and fertilizer competition with orange trees and seedlings. At the same time, weeds are the intermediate host of various pests and diseases. In order to remove weeds, improve the yield of citrus, and further provide the basis for chemical weeding, we conducted a preliminary investigation of the yellow weed. First, the general classification of orange weeds According to the degree of harm weeds on the production and prevention of difficult, can be divided into benign and malignant weeds. It is easy to be eradicated by agricultural measures or chemical herbicides as weeds or weeds. The so-called vicious weed refers to a very wide range of biological properties in reproduction, maturity, natural drop, dormancy and growth have a wide range of distribution, the victim surface