Herbicide Resistant Weeds

GROUP C1/5 RESISTANT MAPLE-LEAVED GOOSEFOOT (Chenopodium hybridum)
Yugoslavia

Saturday, July 31, 2010

What's on this page

Maple-Leaved Goosefoot

1.	Introduction
2.	Level of Infestation
3.	Quick Statistics
4.	Notes about this biotype
5.	Academic Aspects
6.	R Maple-Leaved Goosefoot Globally
7.	Fact Sheets and Literature
8.	Contributing Weed Scientists
9.	Acknowledgements
10.	Where to now?

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Introduction

Level of Infestation

Maple-Leaved Goosefoot (Chenopodium hybridum) is a dicot weed in the Chenopodiaceae family. In Yugoslavia this weed first evolved resistance to Group C1/5 herbicides in 2000 and infests corn. Group C1/5 herbicides are known as Photosystem II inhibitors (Inhibition of photosynthesis at photosystem II). Research has shown that these particular biotypes are resistant to atrazine and they may be cross-resistant to other Group C1/5 herbicides.

Local weed scientists estimate that Group C1/5 resistant Maple-Leaved Goosefoot in Yugoslavia infests 2-5 sites and the number of sites are increasing. They also estimate that there are unknown acres infested with Group C1/5 resistant Maple-Leaved Goosefoot and the area infested is increasing.

The 'Group' letters/numbers that you see throughout this web site refer to the classification of herbicides by their mode of action. To see a full list of herbicides and HRAC herbicide classifications click here.

QUIK STATS ( last updated Sep 02, 2002 )
Common Name	Maple-Leaved Goosefoot
Species	Chenopodium hybridum
Group	Photosystem II inhibitors (C1/5)
Herbicides	atrazine
Location	Yugoslavia, Serbia
Year	2000
Situation(s)	corn
Sites	2-5
Acres Infested	unknown
Contributors	Branko Konstantinovic
Input Data	Edit this Case \| Add New Case of Resistance \| Add Note

ACADEMIC ASPECTS

Confirmation Tests

Field, Greenhouse, and Laboratory trials comparing a known susceptible Maple-Leaved Goosefoot biotype with this Maple-Leaved Goosefoot biotype have been used to confirm resistance. For further information on the tests conducted please contact the local weed scientists that provided this information.

Genetics

The genetic basis of resistance for this biotype is either unknown or has not been entered in the database. If you know anything about the genetic inheritance of this biotype please update the database.

Mechanism of Resistance

The mechanism of resistance for this biotype is either unknown or has not been entered in the database. If you know anything about the mechanism of resistance for this biotype then please update the database.

Relative Fitness

Triazine resistant weeds often exhibit a lower relative fitness when compared to susceptible biotypes. The most common mutation conferring triazine resistance (Ser 264 to Gly mutation of the psbA gene) also causes a reduction in CO₂ fixation, quantum yield, and seed and biomass production. There is no record in this database referring specifically to fitness studies on Group C1/5 resistant Maple-Leaved Goosefoot from Yugoslavia.

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HERBICIDE RESISTANT MAPLE-LEAVED GOOSEFOOT GLOBALLY
#	Country	Year	Sites	Acres	Mode of Action
1.	Yugoslavia	2000	2-5	unknown	Photosystem II inhibitors (C1/5)

FACT SHEETS AND OTHER LITERATURE	Format
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CONTRIBUTING WEED SCIENTISTS

BRANKO KONSTANTINOVIC	Edit
Head Reasearcher University of Novi Sad Department of Environmental and Plant Protection Trg Dositeja Obradovica 8 Novi Sad, 21000, Yugoslavia Yugoslavia Email Branko Konstantinovic

Acknowledgements

Where to now?

The Herbicide Resistance Action Committee, the Weed Science Society of America, and weed scientists in Yugoslavia have been instrumental in providing you this information. Particular thanks is given to Branko Konstantinovic for providing detailed information.

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