Are there alternative insecticidal products after the ban ... · pests of young plants by...

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www.jki.bund.de Are there alternative insecticidal products after the ban of neonicotinoid seed treatment? N. Conrad, M. Brandes & U. Heimbach

Transcript of Are there alternative insecticidal products after the ban ... · pests of young plants by...

Page 1: Are there alternative insecticidal products after the ban ... · pests of young plants by neonicotinoid seed treatments changed crop production systems may need new thresholds 3 Aim

www.jki.bund.de

Are there alternative insecticidal products after the ban of neonicotinoid seed 

treatment? 

N. Conrad, M. Brandes & U. Heimbach

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Background

Ban of neonicotinoids for seed treatment in winter oilseed rape in the EU in 2013 

higher importance of autumn insect pestschemical control of PSYICH relies on synthetic pyrethroids 

but resistance to pyrethroids complicates controlknowledge gap because of many years good control of insect

pests of young plants by neonicotinoid seed treatmentschanged crop production systems may need new thresholds 

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Aim of the study

PhD project started in autumn 2015:

Research on biology and population dynamicsFigure out threshold values for PSYICHDamage potential

Are there alternative control options for autumn pests of oilseed rape? (presented today)

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Phenology of Cabbage stem flea beetle P. chrysocephala

July – September: Diapause in sheltered places 

September ‐ April: Oviposition

October ‐ April:Hatching of larvae

October ‐ May:Larvae feed in petioles and stems 

December‐May:Larvae pupate in the soil

May ‐ July: New adults emerge

September –October:Adults migrate into new crop

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Materials and methods

Product  Active ingredient  Application

control ‐ ‐

Karate Zeon (2015 + 2016)

lambda‐cyhalothrin 7.5 g /ha. sprayed

Foliar appl. 12.10.2015 (1styear) 30.09.2016 (2nd year)

Elado(2015 + 2016)

clothianidin + beta‐cyfluthrin. 10 + 2 g ai / kg

Seed treatment

Fortenza Force(2015) 

cyantraniliprole + tefluthrin. 39 + 25 g ai / 1.000.000 seeds

Seed treatment

Lumiposa(2016)

cyantraniliprole.50 g ai / 1.000.000 seeds

Seed treatment

All treatments with same fungicide (TMTD & DMM) seed treatment and of the same batch of seeds

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Materials and methods24m

30m

1. control2. Karate Zeon3. Elado4. Fortenza Force / Lumiposa

5m

Photoeclector to estimate the number of beetle in autumn

Yellow water trap to detect the beetle activity in autumn

1

3

2

4

3

1

4

2

3

2

1

4

1

4

3

2

Photoeclector to determine the number of emerging young beetles in summer

Assessed insect pests:1. P. chrysocephala (feeding damage; number of larvae)2. D. radicum (root damage)3. M. persicae4. TuYV infection rates

Eclector and yellow water trap

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Autumn yellow water trap catches and beetle density per m2

051015202530

0

10

20

30

40

50

week36

week37

week38

week39

week40

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week45

Aug. Sept. Oct.

Eclector

catche

s (+SD) 

per m

2

Beetles pe

r yello

w  w

ater trap

051015202530

01020304050

week36

week37

week38

week39

week40

week41

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week44

Sept. Oct.

Eclector

catche

s (+SD) 

per m

2

Beetlespe

r yello

wwater

trap Eclector catches

Yellow water trap

2015/16

2016/17

Karate Zeo

n

Karate Zeo

n

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Feeding damage of PSYICH

Shot‐holes

0

1

2

3

4

BBCH 10‐13 BBCH 10‐14 BBCH 13‐18

12.09.2016 19.09.2016 26.09.2016

% dam

aged

 leaf area 

(+SD

)

controlEladoLumiposa

0

0,2

0,4

0,6

0,8

1

BBCH 10‐12 BBCH 11‐13 BBCH 12‐14 BBCH 14‐15

10.09.2015 17.09.2015 24.09.2015 01.10.2015

% dam

aged

 leaf area 

(+SD

)

controlEladoFortenza Force

2015/16

2016/17

A low level of feeding damage in both years!

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No. of emerged plants per 2 m row

0

5

10

15

20

25

BBCH 10‐12 BBCH 10‐13 BBCH 12‐13

03.09.2015 10.09.2015 17.09.2015

Plan

ts per 2 m

 row (+

SD) control Elado Fortenza Force

0

5

10

15

20

25

30

BBCH 0‐14 BBCH 10‐14 BBCH 10‐16

08.09.2016 15.09.2016 13.10.2016

Plan

ts per 2 m

 row (+

SD)

control Elado Lumiposa

2015/16

2016/17

Higher numbers of emerged plants in Elado and Lumiposa/Fortenzaplots

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No. of PSYICH larvae per plant

02468

1012

BBCH 17‐19 BBCH 19 BBCH 19

30.11.2015 15.02.2016 15.03.2016

Larvae

 (+SD

) per plant control

Karate (12.10.2015)EladoFortenza Force

0

2

4

6

8

10

12

BBCH 17‐19 BBCH 19 BBCH 30‐33

07.11.2016 06.02.2017 21.03.2017

Larvae

 (+SD

) per plant control

Karate (30.09.2016)EladoLumiposa

No. of larvae in both years significantly lower in Karate Zeon plots

Elado with clear effects only in 2ndyear

No effects visible for Fortenza/Lumiposa

2015/16

2016/17

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Cumulative daily degrees

Month 2015‐2016 2016‐2017 Difference

September 422.5 586.6 ‐164.1

October 287.8 323.6 ‐35.8

November 273.8 163.6 110.2

December 270.7 141.7 129.0

January 96.1 43.8 52.3

Sum 1350.9 1259.3 91.6

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No. of emerged beetles per m2

Eclector

2015/16

2016/17

020406080

100120

Week 24 Week 25 Week 26 Week 27 Week 28 Week 29

June July

Emerged be

ttlespe

r m

2

controlKarate ZeonEladoLumiposa

0

20

40

60

80

Week 23 Week 24 Week 25 Week 26 Week 27 Week 28

June July

Emerged be

etles pe

r m

2 controlKarate ZeonEladoFortenza Force

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No. of emerged beetles per m2

Eclector

Treatment Mean number of emerged beetles / m²

SD

control 156 ± 40Karate Zeon 28 ± 24Elado 272 ± 104Lumiposa 108 ± 44

2015/16

2016/17

Treatment Mean number of emerged beetles / m²

SD

control 82 ± 41

Karate Zeon 10 ± 8

Elado 65 ± 46

Fortenza Force 128 ± 60

Reduced No. of emerged beetles in Karate plots

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Infestation of M. persicae

M. persicae 

02468

10121416

BBCH 12‐15 BBCH 12‐17 BBCH 13‐17

04.10.2016 17.10.2016 31.10.2016

M. p

ersicae (+SD

) per plant 

controlKarate zeon (30.09.2016)EladoLumiposa

2015/16

2016/17Reduced No. of aphids in Elado plots

No influence of Karate Zeon and Lumiposa/Fortenzaon No. of aphids

1.6 !

16.0 !

0.04

0.19

00,20,40,60,81

1,21,41,6

BBCH 14‐15 BBCH 15‐16

30.09.2015 12.10.2015

M. p

ersicae (+SD

) per plant  control

Karate Zeon (12.10.2015)EladoFortenza Force

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Plants infected by TuYV

No differences between quantitative Virus‐titer!! 

Virus symptoms

0

20

40

60

80

100

BBCH 17‐19 BBCH 31‐33

10.11.2016 30.03.2017

% TuY

V infected

 plants 

(+SD

controlKarate ZeonEladoLumiposa

0

20

40

60

80

100

BBCH 19 BBCH 19

10.12.2015 14.03.2016

% TuY

V infected

 plants (+SD

)  controlKarate ZeonEladoFortenza Force

2015/16

2016/17

Effects of Elado only at low levels of aphid infestation

No effects of Karate and Lumiposa/Fortenza

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Yield

Treatment Yield std Difference (kg)to control

% ofcontrol

2015/16Control 2557 156 - -Karate Zeon 2581 265 24 100Elado 2720 147 162 106Fortenza Force 2517 187 -39 982016/17Control 2420 239 - -Karate Zeon 2437 308 17 100Elado 2623 181 203 107Lumiposa 2478 460 57 94

No clear difference between treatments because of high variability, but Elado in both years better!!

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Summary

Low leaf feeding damage of PYSICH in both years but more emerged plants in ELADO and Lumiposa/Fortenza.

Low infestations with cabbage root fly (< 30% damaged root area at single plant level) in both years

Application of Karate Zeon significantly decreased the No. of flea beetle larvae in both years. Effects of Elado seed treatment visible only at early migration in 2016/17

No influence of cyantraniliprol products on PSYICH observed

No. of aphids, especially M. persicae, reduced  by Clothianidin. TuYVinfestation only slightly reduced, but depending on infestation levels

All insecticide treatments had no clear influence on  yield in both years, but Elado in both years better

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The work was funded by the Union forPromoting Oil and Protein Plants e. V. (UFOP)

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Thank you!!!