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Comb harrow: efficient weed control in cereals

{Tool} Comb harrow: efficient weed control in cereals. Creator(s): Apostolov, Stoylko; Kirov, P and Tihov, N. Issuing Organisation(s): Foundation for organic agriculture "Bioselena". OK-Net Arable Practice abstract, no. 024. (2018)

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PDF - Bulgarian (Щригелна брана – ефективен инструмент за контрол на плевелите при биологично производство на зърнено-житни култури)
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Online at: http://orgprints.org/32614

Summary

In the beginning, weeds with shallow roots were successfully eradicated by the harrow. Others (e.g., burdock and stork’s bill) were controlled to a certain extent. The results of FAO "Bioselena" show that the application of the comb harrow had a significant impact on the yield, with an increase of 12.7 % for wheat, 16.7 % for spelt and 23.4 % for ein-korn. The weeds decreased by 51.15 %, 58.14 % and 36.37 %, respectively.
Practical recommendations
• Drill winter cereals in rows with an increased sowing rate of 7-10 % compared to conventional cereal crops during the most appropriate period (September 25 to October 5 for Northern Bulgaria, 5 to 15 October for Southern Bulgaria).
• When the crop is in the „3-leaf“ stage, control the emerging weeds with a comb harrow.
• Repeat the procedure, when the wheat plants start tillering.
• Use the harrow again at the earliest possible time in spring to destroy the soil crust and aerate the soil.

Summary translation

В началото на развитие плевелите с плитки корени успешно бяха изкоренени от браната. Други (пирей, балур, паламида) бяха контролирани до определена степен. Резултатите от опита на ФБЗ „Биоселена” показват, че приложението на щригелната брана оказа значително влияние върху добива. Той се увеличи с 12,7 % при пшеница; 16,7 % при спелта и 23,4 % при лимец. Плевелите намаляха съответно с 51,15 %; 58,14 % и 36,37 %.
Практически препоръки
• посейте зимните зърнени култури редово със сеялка, с повишена сеитбена норма(7-10 %) през най-подходящите срокове ( 25 септември-5 октомври за северна България; 5-15 октомври- за южна)
• когато културата е във фаза „3-ти лист”- контролирайте поникналите плевели с брануванe;
• когато житнитe растения започват „братене”, използвайте отново браната.
• при първа възможност за работа напролет- бранувайте. Така разрушавате почвената кора и аерирате почвата.

EPrint Type:Practice tool
What problem does the tool address?:Weeds are a major problem in organic cereal production. The most common weeds are wild poppy, forking larkspur, cleavers, chamo-mile, common speedwell, podium Anthemis, combine, stork‘s bill, burdock, Bermuda grass and Sorghum halepense. Weed develop-ment before tillering can reduce yields, hinder the harvest, and in-crease weed pressure in the subsequent crop.
What solution does the tool offer?:In organic farming, the use of herbicides is prohibited. Therefore, organic farmers depend on preventive weed control measures such as crop rotation and mechanical control measures for weed control. In many countries, the comb har-row is a standard tool for weed control in early stages of cereal growth. The aim is to achieve the lowest possible weed density until the end of tillering. Growth of problem weeds such as cleavers, chamomile, hollow tooth, field foxtail, mustard, etc. should be prevented until the end of stem extension.
In Bulgaria, many farmers are not familiar with the comb harrow, and some have doubts about its efficiency. Hence, the effect of harrowing was tested in Bulgaria on 3 farms for 3 cereals (wheat, spelt and einkorn). Within each field, 2 experimental plots were created: one with comb harrow use, and a control plot without harrow use.
Country:Bulgaria
Type of Practice Tool:Practice abstracts
Theme:Weed management
Keywords:cereal crop, weed management
Subjects: Crop husbandry > Production systems > Cereals, pulses and oilseeds
Crop husbandry > Weed management
Research affiliation: Bulgaria > Bioselena
European Union > OK-Net Arable
International Organizations > International Federation of Organic Agriculture Movements IFOAM > IFOAM EU Group
FP7 Grant Agreement Number:652654
Related Links:http://farmknowledge.org/index.php/search-for-ok-tools?v=32614
Project ID:oknet
Deposited By: Basler, Andreas
ID Code:32614
Deposited On:01 Feb 2018 13:21
Last Modified:29 May 2018 12:59
Document Language:English, Bulgarian
Status:Published

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