close

Вход

Забыли?

вход по аккаунту

?

New Technologies for Soil Insect Control in Corn

код для вставкиСкачать
Field Crop Insect
Update
Changes in Pest
Management
Ric Bessin
Extension Entomologist
University of Kentucky
Lexington
Pest Management Changes
• Preventive Controls
–
–
–
–
Bt crops
Seed treatments
All seed treated with some companies
More stacked Bts (CB + RW)
• Pest Monitoring
– Doug Johnson and Patty Lucas
• Higher input costs/grain prices
– Effect of Economic thresholds?
Changes in Pest Populations
Less Common
• Black cutworm
• European corn borer
• SW corn borer
• Fall armyworm
• Flea beetles
More common
• Wireworms
• Corn Rootworm
• Stink bug
• Soybean stem borer
• Armyworms
• Soybean aphid
Bt’s for Corn Pests
YieldGard Corn Borer
(Cry1Ab)
YieldGard Rootworm
(Cry3Bb1)
YieldGard Plus
(Cry1Ab+Cry3Bb1)
Herculex
(Cry1F)
Herculex RW
(Cry34Ab1+Cry35Ab1)
Herculex Xtra (Cry1F+Cry34Ab1+Cry35Ab1)
Agrisure CB
(Cry1Ab)
Agrisure RW
(mCry3A)
Agrisure CB/RW
(Cry1AB+mCry3A)
YieldGard VT RW
(Cry3Bb1)
YieldGard VT Triple
(Cry1Ab + Cry3Bb1)
Insects Controlled by Bt Corn
ECB
SWCB
BCW
FAW
CRW
YieldGard CB
++
++
-
+
-
YieldGard RW
-
-
-
-
++
YieldGard Plus
++
++
-
+
++
Herculex
++
++
++
++
-
Herculex RW
-
-
-
-
++
Herculex Xtra
++
++
++
++
++
Agrisure CB
++
++
-
+
-
Agrisure RW
-
-
-
-
++
++
++
-
+
++
Agrisure CB/RW
Future Directions of
Bt Corn
• Resistance Management
• Redundant Bt genes
– SmartStax
• New refuge strategies
– AcresMax
YieldGard RW,
Urbana, July 2, 2007:
Mike Gray, Univ of IL
MONSANTO, DOW AGREEMENT PAVES THE WAY FOR INDUSTRY’S
FIRST-EVER, EIGHT-GENE STACKED OFFERING IN CORN
Stacked product combines Dow AgroSciences’ and Monsanto’s
insect-protection and weed control trait technologies; product set to
deliver greater performance, value and options for farmers
INDIANAPOLIS and ST. LOUIS (Sept. 14, 2007) – Monsanto (NYSE:
MON) and Dow AgroSciences LLC, a subsidiary of The Dow Chemical
Company (NYSE: DOW), have reached a cross-licensing agreement
aimed at launching SmartStax™, the industry’s first-ever eight-gene
stacked combination in corn. The agreement is expected to create a
new competitive standard for stacked-trait offerings and present an
expanded growth opportunity for both companies’ seed brands and
traits businesses by the end of the decade.
Resistance Management
• High-dose refuge strategy
– Need 500:1 susceptible to resistant ratio
• No more than 80% Bt corn
– Refuge within ½ mile for CB Bt’s
– Refuge immediately adjacent for RW and
CB/RW Bt lines
When is Bt Corn Needed?
• Bt CB –
– Late planted corn
– Corn planted after May 5
• Bt RW –
– Corn following corn >2 yrs
• Bt CB + RW –
– When both of the above is true
Yield Benefit by Planting Date,
6-Year Average
Planting Date
Non-Bt Tunneling
(in)
Yield Diff.
(bu)
Early – Mid April
3.5
3.3
4.5
2.3
4.6
6.6
5.7
9.3
6.5
20.7
4/5 – 4/13
Late April
4/17 – 4/30
Early –Mid May
5/6 – 5/13
Late May
5/21 – 5/31
Early – Mid June
6/5 - 6/14
* UKREC: Herbek, Johnson, Bessin
Results of Hybrid
Preformance Trials
• Many Single, Double and
Triple stacks yielded very
well in 2007
• Even where RW and CB
pressure low
Seed Treatments
• On virtually all corn seed
• Providing insect control to help
with stand establishment
• Other benefits
– Seedling vigor?
Seed Treatments and
Vigor
• In some studies, a yield bump not
due to insect protection
• Micro array data showing drought
& cold tolerance, and other stress
related genes turned on
• Does not occur in all situations, not
well understood
Direction of Seed
Treatments
• Vigor enhancement
• Nematode control
• Resistance management – new
classes of insecticides for seed
treatments
Insects Controlled
WW
WG
FB
SCM BCW CRW
Gaucho
++
++
+
++
-
-
Prescribe
++
++
++
++
-
+
Cruiser Ex Pak
++
++
++
++
+
-
Cruiser EP CRW
++
++
++
++
+
++
Poncho 250
++
++
++
++
+
-
Poncho 1250
++
++
++
++
++
++
Pest Monitoring
• Armyworm
• Black Cutworm
• ECB and SWCB
• Corn earworm
• Fall Armyworm
Overwintering SWCB Survival
Caldwell, Henderson, Davies, Hardin Counties
Four fields/county
Year
2007
2006
2005
2004
2003
2002
2001
2000
1999
Survival/
Girdled
SWCB/stalk
girdled stalk
stalks (%)
(%)
(%)
12.8
1.4
0.18
15.0
31.8
4.82
5.6
5.1
0.29
15.6
2.5
0.39
26.6
4.3
1.13
11.8
5.3
0.63
40.6
9.7
3.92
20.7
26.9
5.57
35.9
10.1
3.64
Kevin Steffey: Univ of IL
Year
2007
0.52
0.16
0.34
0.33
0.13
0.6
2003
0.27
0.52
0.29
0.34
0
1999
1995
0.7
0.91
0.95
1.1
1.3
1.36
1.24
1.6
1.7
1.7
1.55
1.4
1.3
1.04
1
1
0.26
0.53
0.76
0.4
0.9
1.2
2.07
2.2
2.8
2.8
3.3
3.48
3.5
1991
1987
1983
1979
1975
0.4
0.3
0.6
0.6
1
1
1
1.2
2.5
1971
1967
1963
0.6
1.5
1.8
3
1959
0.7
0.8
0.8
1.3
1.4
1.4
2
1955
0.5
0.4
0.5
0.9
1.4
1.5
4.2
4.5
1951
0.6
1
0.8
1.5
1947
1943
Avg. no. larvae/plant
Summary of European Corn Borer Fall Surveys,
University of Illinois Extension
1943-2007
4
Документ
Категория
Презентации
Просмотров
42
Размер файла
1 068 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа