Resistance Management - UPL OpenAg

Weeds Resistance

Volunteer corn

Volunteer corn

During double crop corn harvest it is common to occur kernels and ear losses which can generate volunteer corn, also known as guaxa plant or tiguera in soybean crop.

This species should be seen as aggressive to commercial soybean cultivation, as they compete for light, water and nutrients, compromising productivity. Some studies point out that the presence of 2 to 4 corn plants per square meter can cause a reduction up to 50% of the crop.

How to manage

Previously, chemical control of volunteer corn was done with herbicide glyphosate, however, the application of this product has no longer shown satisfactory results, and once this plant is derived from hybrids resistant to it.

One aspect to be observed is that the germination of this corn can be uneven, resulting in more than a single application of herbicides. The main recommendation for chemical control is to carry it out before sowing or in soybean post-emergence with ACCase inhibitors. The younger the plant is, the easier management will be and in smaller doses

Preventive Actions

They are also extremely important to this issue as scouting the beginning of the resistant plant and avoiding grain losses during corn harvesting.


UPL has in its portfolio solutions which provide support in Volunteer Corn, avoiding yield and quality losses in the crop. Click on the image to know more about each product.