Amaranthus palmeri develops resistance to herbicides‏ in Brazil
Date:07-27-2015
The Mato Grosso Institute of Cotton (IMAMt) identified that the careless weed (
Amaranthus palmeri) is already present in Brazil. The specie, which is the major weed on cotton in the United States, was present in the state of Mato Grosso, in areas used with rotational crops such as cotton, soybeans, and corn.
"Plants of the genus amaranthus were analyzed and caught attention for not manifesting symptoms of toxicity after the application of glyphosate [...] besides resistance to ALS inhibitor herbicides," informs a technical newsletter of IMAMt.
On that basis, the Institute of Crop Protection of Mato Grosso (Indea-MT) published a Normative Instruction (No. 47/2015) with rules to contain and eradicate the plague in the Brazilian state. The document establishes procedures for the case of an appearance of the weed, which concludes that there a necessity of an allowance of Indea-MT to take harvesters out of the property.
Where the careless weed is identified, the farmer should monitor the plots in an interval smaller than 10 days, destroying the plague immediately. The field of seeds production of any specie should remain free of the weed until harvest.
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