南方果园草情调查及化学除草的研究

Study of the weed situation in southern orchards and chemical weeding

在本校果园进行杂草种类初步调查 ,共有 1 7科 5 2种杂草 ,主要有马唐、狗牙根、空心莲子草、蟛蜞菊等。除草试验结果表明 :草苷膦、春多多 1 0 0 0倍液对各种杂草有明显的防除效果 ,30 d总防效达 92 %以上 ,持效期长 ;克芜踪药后 1 5 d药效达 92 .7% ,但持效期短 ,30 d后有幼草萌芽 ;拿捕净对禾本科有较好防效 ,对莎草科杂草及阔叶杂草无防除作用。

There are about 17 families and 52 varieties of weeds in our orchards. They are mainly Crabgrass, Bermuda grass, Alternanthera sessilis R·Br. and wedelia chinensis, etc. The weeding test shows that Roundup and glyphosate 1000 times liquid have obvious effect on precaution and weeding. The precaution effect can reach 92% during 30 days, with long effective period. Paraquats effectiveness is 92.7% during 15 days, but with short effective period. 30 days later, grass roots sprout. Sethoxydim has a better precautious effect on the grass family, but has no precaution and weeding effect on Gyperaceae weed and wide leafed weed.