Field experience with RR maize in Czech Republic Josef Soukup V. Venclová, M. Jursík, J. Holec, J. Janků, L. Procházka Czech University of Life Sciences Prague [email protected] Prague 14 th June 2011
Jan 14, 2015
Field experience with RR maize in Czech Republic
Josef SoukupV. Venclová, M. Jursík, J. Holec, J. Janků, L. Procházka
Czech University of Life Sciences [email protected]
Prague14th June 2011
Content of the presentation:
Maize in CZEnvironmental conditions and weedoccurence in CZPrinciples and issues of weed controlin maizeExperience with Roundup Readysystem in maizeField visit - trial with RR maize
Corn production: 2/3 of the area or 8.4 Mha
Silage: 36% of the area or 4.7 Mha
Source: European Confederation of Maize Production
Biogas stations
http://www.biogaz-zeneris.com.pl/attachments/079_Ready_Biogas_Stations.pdf
Map of biogass stations in CZ(253 in total)
Area in CZ endangeredby water erosion
Water erosion
(www.vumop.cz)
most endangered
strongly endangered
moderat. endangered
slightly endangered
not endangered
„Cross Compliance“ requirementsGAEC – Good Agricultural and Env. Conditions
GAEC 1, GAEC 2 – Soil erosionMaize and other wide-row crops may not be grown in fields strongly endangered by erosionIn field moderately endangered by erosion, only soil conservation tillage may be used
Plant residues should cover 30% of soil surfaceNo-till or reduced tillage should be used
Mulch as a protective measureagainst water erosion
Maize sowing in mulchusing no-till sowing machine
Weed control in maizedependes on site conditions
Geographical distribution of weedsMediterranean, Central/West/North Europe
Climatic / weather conditionsevaporation, drought periodessoil moisture – weed emergence, herbicide uptake
Farming practicesshare of maize in crop rotationssoil tillage systems
oceanic
Higher altitudes, colder climateChenopodium albumAgropyron repensPolygonum lapathifoliumPolygonum convolvulusPolygonum aviculareMatricaria sp....
Lowland, warmer regionsAmaranthus retroflexusEchinochloa crus-galliPolygonum lapathifoliumAgropyron repensChenopodium albumPolygonum convolvulusAbutilon Theophrasti...
Natural conditions vs. weed occurence in CZ
continental climate
Most frequent weeds in CZ(conventional: after herbicide application)
conventional farming
Survey by Kolarova and Tyser, 2008-2009
Most frequent weeds in CZ(organic: after mechanical weed control)
organic farming
Survey by Kolarova and Tyser, 2008-2009
Weeds of various life cyclescan occur in maize...
Summer annuals(Chenopodium album, Polygonum lapathifolium, Amaranthus spp., Echinochloa crus-galli, Solanumsp., Mercurialis annua, Abutilon, Panicum, ...)
Winter annuals(Matricaria spp., Stellaria media, Galium aparine, Thlaspi arvense, Capsella bursa pastoris, ...)
Spring annuals(Polygonum convolvulus, P. aviculare, Geleopsistetrahit, Sinapis arvensis, Avena fatua, ...)
Perennial(Agropyron repens, Cirsium arvense, Concolvulusarvensis, Sonchus arvensis, Equisetum arvense,...)
0,0
50,0
100,0
150,0
200,0
250,0
300,0
350,0
400,0
450,0
3.3 2.4 2.5 1.6 1.7
31.7
30.8
29.9
29.10
28.11po
čet v
zešl
ých
rost
lin (m
2)Emergence of summer annual weeds (CZ)
E. crus-galli
M. annua
Ch. album
A. retroflexus
S. nigrum
D. stramonium
3-4 months weed emergence
Jursík et al. 2007, adapted
No.
ofe
mer
ged
plan
ts
Driving factors:- temperatures- soil moisture- seed dormancy- photoperiodism- soil tillage- ...
Patterns of weed emergence in maize:- many factors involved- cumulative temperatures seem to be the
main factor- soil moisture and photosensitivity are the
sources of seasonal variability- very hard to predict the best time for weed
control in maize
Sousa et al.: Predicting weed emergence in maize crops under two contrasting climaticconditions. Weed Res. 3, 251-260, 2009.
Influence of temperatureon crop – weed interactions
Temperature influences:• weed community composition• symetry of competition• photosynthesis and biomass accumulation
Impact of soil mosture
Eveness of weed emergenceEfficacy of soil active herbicides
Daily precipitations beforethe application of PRE herbicides
(May 1st - May 15th, 2010)
sowing date 12.5. 2010
appl
icat
ion
12.5
.201
0rainfall period
2010 – plots after pre-emergenceapplication of acetochlor + terbuthylazine
tillage with plough no till - mulch
good effect of pre-emergence herbicides in 2010
Daily precipitations beforethe application of PRE herbicides
(April 15th - May 15th, 2011)
sowing date 28.4.2011
appl
icat
ion
date
28.4
.
dry period
2011 – plots after pre-emergenceapplication of acetochlor + terbuthylazine
tillage with plough reduced tillage
failure of pre-emergence herbicides in 2011
Weed competition in maize(yield reduction ~ 30-70%)
untreated plot
time scale (maize growth stage)0
20
40
60
80
100
weeds occurr until ... weeds occurr from ...
critical period
rela
tive
yiel
d[%
]Critical period in maize-weeds competition
„period for exclusion of weed competition“
4 . – 8. maize leaves
Most popular herbicides in CZ
Pre-emergenceacetochlor + terbuthyazineterbuthyazine + S-metolachlorisoxaflutole
Increasing requirementson safety of plant protection products...
Result of Review Programmeof existing pesticides, 2001-2009
Regulation 1107/2009 EC on placing on the market of plant protection products 2009/128 Directive 2009/128 EC on the sustainable use of pesticides
Most popular herbicides in CZPost-emergence
terbuthylazine + S-metolachlornicosulfuronrimsulfuron + dicambaforamsulfuron + iodosulfuronmesotrione, tembotrioneterbuthyazine + S-metolachlor + mesotrioneisoxaflutole + thiencarbazone
Do we need Roundup Ready?
RR allows application flexibility accordingweed pressure – important premise of IWM,eliminates crop injuries (phytotoxicity),provides efficient and cheap solutions againstgrasses – both annual and perennial, enriches number of herbicide modes of actionused in maize,exhibits a very good environmental profile.
RR - no problem with crop injury2,4 D
rimsulfuron
bromoxynil
Slight crop injury (phytotoxicity) 5-15% is very common for many post-emergence herbicides
Use of herbicides in conservation tillage(no-till, mulch)
Roundup Ready Conventional pre-em
Five years experince withRoundup Ready technology in maize
3 years small plot experiments (2007-2009)sensitivity of individual weed speciesimpact on composition of weed communityefficacy and selectivity of various herbicide treatmens in RR system
2 years large plot experiment (2010-2011)efficacy of various herbicide treatmentsperformance of RR in various soil tillage systemsimpact of technology on NTOs
Differences in sensitivityto glyphosate in different weed species
Amaranthus retroflexus Echinochloa crus-galli
dose
resp
onse
0
20
40
60
80
100
0 0.1 1 10 100 1000
1
dose
resp
onse
0
20
40
60
80
100
0 0.1 1 10 100 1000
1
Different species sensitivity (WAT4)Weed Picture Curv ED50 ED90 ED90 / ED50
ratio
AMARE 197.1 411.9 2.1
SOLPS 265.4 475.0 1.8
CHEAL 363.6 677.1 1.9
MERAN 249.1 685.4 2.8
ECHCG 361.7 1334.6 3.7
ECHCG
AMARE
Summary – species sensitivityto glyphosate
High differences in sensitivity to glyphosate between tested species were foundAMARE, SOLPS – very sensitive (ED90 ≅ 400 - 500 g ha-1)CHEAL, MERAN – medium sens. (ED90 ≅ 700 g ha-1)ECHCG, POLLA – low sensitivity (ED90 ≅ 1300 g ha-1)Regeneration occured when ED90 / ED50 > 2.8 (in ECHCG, MERAN)Intended registered rate (2+2 or 3+3 lt/ha) of Roundupis sufficient for control of all tested annual speciesThe herbicide dose should be chosen according the most tolerant species to avoid the weed shift
Large-plot field trial3 soil tillage systems
plough + conventional seedbed preparationreduced tillage in autumn + conv. seedbedreduced tillage in autumn + seeding in mulch
5 herbicide treatmentspre-emergence: acetochlor + terbuthylazinepost-emergence: foramsulfuron + iodosulfuronRR1: acetochlor (pre) + Roundup (post)RR2: split Roundup (epost) + Roudup (post)RR3: Roundup + acetochlor (epost)
Trial design
Sowing
Application of herbicides
Some results from 2010
1 year data!
acetochlor (pre) + Roundup
Roundup 2x (split)
Roundup Ready + acetochlor(EPOST)
Harder control in mulch / reduced
Herbicide efficacy on AMARE
86 88 90 92 94 96 98 100
acetochlor + terbuthylazinec(PRE)
foramsulfuron + iodosulfuron (POST)
acetochlor (PRE) + Roundup (POST)
Roundup (EPOST + POST)
Roundup + acetochlor (EPOST)
efficacy (%)mulch chisel plough
Herbicide efficacy on CHEAL
82 84 86 88 90 92 94 96 98 100
acetochlor + terbuthylazinec(PRE)
foramsulfuron + iodosulfuron (POST)
acetochlor (PRE) + Roundup (POST)
Roundup (EPOST + POST)
Roundup + acetochlor (EPOST)
efficacy (%)mulch chisel plough
Herbicide efficacy on ECHCG
80 82 84 86 88 90 92 94 96 98 100
acetochlor + terbuthylazine (PRE)
foramsulfuron + iodosulfuron (POST)
acetochlor (PRE) + Roundup (POST)
Roundup (EPOST + POST)
Roundup + acetochlor (EPOST)
efficacy (%)mulch chisel plough
Harvest...
Yield assessment(14% moisture)
0 2 4 6 8 10 12
acetochlor + terbuthylazine (PRE)
foramsulfuron + iodosulfuron (POST)
acetochlor (PRE) + Roundup (POST)
Roundup (EPOST + POST)
Roundup + acetochlor (EPOST)
grain yield (t/ha)mulch chisel plough
Experience with NK603 maizesome conclusins
All RR treatments (split; with acetochlor) showed comparable or better weed control effects than conventional herbicidesStable affect through the yearsNo problems with herbicide selectivity were observed Better control of perennial weeds and grassesSecond weed flush was not a serious problemBetter reliability in soil conservation tillage systems
Welcome to our trial!
60 mm rain last week ...