In which crops can you use CombCut?
Here below are some examples of how you can use CombCut with your particular crop. We provide here some time in the relationship between crops and weeds. Would you take your starting point from the weeds go to our weed page here
We reiterate the basics that you can comb and cut the weeds (called CombCutting) in your crop with CombCut when:
- The crop is thinner than the weeds. And or
- The weeds are branched (not crop). And or
- There are differences in stiffness between crops and weeds
But CombCut can also be used to cut weeds sticking up above your crop if you, for example, grows beans, potatoes, turnips or any other broadleaf or branched crop. Of course you can use CombCut also in cereals and ley / grassland at the above mentioned conditions.
And as usual it’s all about timing in the growth stage and the relationship between how far the crop and the weeds come in its growth. The most optimal time tend to be if there is an opportunity to cut just before the crop elpngates or closes (eg straw shooting phase for cereals). Then it is cut, damaged weeds difficult to resist the competition from the crop that extends or closes.
Wheat, oats, barley, rye
Cereals are fine leafed and generally unbranched grasses that it is perfectly possible to comb through to cut most weeds. Scientific evidence we have for cutting creeping / Canadian thistle but it is perfectly possible to cut cocklebur, goosefoot, field pennycress, wild mustard / charlock, poppy, cornflower and others. Later, after the ear emergence, it is good to cut flowers and buds of the weeds that stands above the crop to prevent seed dispersal. Cutting above the crop generally applies to all crops.
Generally speaking, it is easier to perform control in spring cereals where weeds often have a greater advantage than the cultivation of winter cereals.
Grassland / ley
In seedede grassland / ley “combcutting” is done with the first pruning before the first harvest not later than one week before the harvest so the grass will have time to rise again. Timing is important, as usual. If you have a heavy weed growth cut it a little earlier before the first harvest of the hay will have time surpress weeds and thus reduce the growth of these. After harvesting, use CombCut again when growth of the weeds started to take off and stretch and thus is ready to be “combcutted” effectively.
Common weeds here is: cocklebur, dandelion, thistle. Rumex is especially important to cut at flowering so that the seeds do not reach maturity.
Examples in the film below:
For pastures/ natural grassland, cut the weeds early in spring – early summer is often similar weeds in pastures. Especially cocklebur and dandelion tend to be problems, but in some cases, nettles and thistles. What may be the problem is that it is often inferior land that is not classified as agricultural land and therefore often containing larger stones and rock and is often uneven. In such conditions it is difficult to drive with any gear also CombCut. To think of is that it is important that the weeds get competition from the pasture for a while after cutting. Here also need the both the weeds and the crop have stretched themselves before cutting but as usually supposed to be the case before releasing the animals out to the grassland.
Legumes / pulses
Since pulses are branched CombCut only suitable to cut the weeds that stretches above the crop. The combing and cutting effect fails but the cutting is good for most weeds above the crop. Ideally suited to, for example, cut cocklebur and goosefoot before the seeds has developed so much in its development that it can mature at the cut plant part.
The most common weeds here is goosefoot (at least in Sweden) receiving extra boost later when legumes are beginning to bind nitrogen in the soil.
In terms of root vegetables, you can generally say that the weeds can be cut above the crop. In root crops with narrower leaves can be lower down CombCut little of the crop and thus cut the weeds closer to the ground. Again, pigweed and other nutrient-loving weeds, a common weed due these crops are fertilized much.
Sugar beet, later in the season it is not uncommon for sugar (and other root crops) would set seed and therefore bolts (affecting sugar), taking energy from the sugar beet growth, hampers the absorption and next year will be a troublesome weed not possible to spray of. These need to be cut early before they get too big and heavy for CombCut to handle. It often requires cutting them more than once.
Examples in the film below: Cutting mayweed in parsnips.
Excellent for cutting weeds above the potato tops. There have been some theoretical discussions that CombCut can be used as blast killer before harvesting of potatoes. This, we ourselves have not yet been tested yet but maybe interesting for the more experimental grower.
Maize / corn
In corn, you can use CombCut before the corn has become so stiff that it is damaged by CombCut. This is usually done at about 15-20 cm height, depending on variety. So it is possible to comb and cut the weeds in Majsa long as they resemble grains and leaves are thin and soft. Then it is possible to cut overhead.
Examples of the film below: Weed control in corn.
Other crops where there have been discussions or we received information from experimental growers.
- Flaxseed is a thin weak competitive crop. We have no experiences on CombCutting this crop ourselves. However, we have received reports that it works well from the example in France.
- Green peas – thistle buds resemble peas in size and weight of peas and is therefore very difficult to clean off. Need, however, be cut in time before threshing, so that the combine not absorb the cut buds.
- Gherkin Not possible to comb through but since they are low-growing, it is easy to cut weeds standing above. The same applies to pumpkins.
- Onion / garlic. Competaeive weak crop. Form thin soft leaves that in early stages resemblecereal and hay and can at this stage be combed through. Later thicker but still soft. Should be able to run a bit down in the crop without being damaged.