The Study Of Technology Of Weed Control In Ginger Field In Shandong

The article is study of the consists of weeds community in ginger field,the influence of herebicde to evolutive rule of weeds community,the single formulation used in ginger field and the selection of mixed formulation. The followings are result.1 The species of weeds in ginger field, harm characteristic and consists of the community.The species and community structure of the weeds were investigated using 5 categories rating system by visual range estimation in ginger fields to study the two main ginger output area in shandong province:laiwu area and anqiu city.the result indicates :there are 16 families 32 species in ginger field of the two area. The main weeds are gramineous weeds, broad-leaved weeds and sedge. The familiar weeds are: gramineous weeds:Common crabgrass, Goosegrass, Green bristlegrass, Barnyardgrass chief, broad weeds:Redroot amaranth Lambsquaters, Purslane , Copperleaf , Common dayflower , Yerbadetaio , Siberian cocklebur, sedge:Rice galingale。There are two kinds of ginger plant: tectorial plant and open air plant. Because the output of tectorial plant is high and the quality is more better, the price is more expensive, tectorial plant is the main method of agriculture production at present. The humidity is high and temperature below plastic membrane is also high in tectorial plant ginger field. The species of weeds are excessive and the quantity is much big.The weeds in open-aired plant are approximately same with that is intectorial paint ginger field. The difference between them is the quantity, the weeds in open-aired plant are less than tectorial paint, and the harm time is less 5-10 days.There is no obvious difference among shandong main ginger production areas, the main weeds are: Common crabgrass, Goosegrass, Redroot amaranth, Purslane , Rice galingale.The survey result of ginger harm indicate: from the survey result of shandong laiwu and anqiu area's one hundred piece of ginger feils, the weeds such as Goosegrass, Common crabgrass, Rice galinga, Purslane , Redroot amaranth, appearance frequency reach 80%.2, The influence of herbicide to ginger field weeds community.The herbicides, pendimethalin, oxyfluorfen and pendimethalin-oxyfluorfen, often used in garlic fields, had been selected for weeds control in garlic fields for 4 years.the result indicate: if use different kinds herbicide continuously,the weeds community will be affected. Use pendimethalin continuously, the gramineous weeds will decrease obviously, but Yerbadetaio, Copperleaf etc. broad weeds will increase. Use oxyfluorfen for four years, the broad-leaved weeds will decrease quickly, but the quantity of Wild Oat will increase obviously. Use 20 % Pendimethalin · oxyfluorfen EC for four years,the quantity of weeds community will decarease, general result of prevention and cure is stable. It certify that use mixed herbicide can be good to control the evolvement of weed community.3, The selection of ginger field herbicide and toxicological test.The article describes the contrast experience of field among alachlorN acetochlor , metolachlor , propisochlor, Caparol, Pendimethalin , oxyfluorfen, oxadiazon etc 8 herbicides, primarily knows the effect of the eight herbicides. It certify that activity of acetochlor is highest.and there no obvious difference among alachlor, metolachlor, propisochlor.The saftyof acetochlor is worst,the safty of metolachlor, propisochlor on ginger is highest, secondly is alachlor. The field experience indicates that the result of chloroacetamide herbicide is very good to kill gramineous weed. But the result is bad on broad-leaved weed. The field experience of Pendimethalin, oxyfluorfen, oxadiazon indicate that pendimethalin has good result to gramineous weed,the other three herbicides has good result to broad-leaved. From the general result that the result of oxadiazon is better than Caparol oxyfluorfen, obviously better than pendimethalin. But theresult o fthe four single herbicide are not very good.At the same time, according to the character of themselves, and link the field experience, put forward three mixed fornulation: Pendimethalin + Caparol, acetochlor + oxadiazon, acetochlor + oxyfluorfen4, Selection of mixed formulation ginger field herbicideThe study indicates that the rate between Pendimethalin and Caparol is 3:4,and has obvious improved control effect.The rate between acetochlor and oxyfluorfen is 8-9:1,and also has obvious improved control effect. The rate between acetochlor and oxadiazon is 2-4:l,Gowing method indicates they has obvious improved control effect.5, Primary put forward the defend and kill chemical technology of ginger field.