澳门金沙平台开户网址是多少:Nature's assassin

 作者:丰内怅     |      日期:2019-03-07 01:09:28
By Kurt Kleiner ORGANIC farmers could soon be using their first broad-spectrum herbicide in the shape of a fungus-derived protein that attacks broadleaved weeds. The protein, taken from the soil fungus Fusarium oxysporum, kills the leaves of many broadleaved weeds, but doesn’t damage crops such as corn, says Bryan Bailey, a plant pathologist with the US Department of Agriculture in Beltsville, Maryland. The protein does not kill the weeds outright but they are stunted until new leaves grow back. “If you can delay the weed problem, the crop will outgrow it and shade it out,