Erzsébet Nádasy – Gábor WágnerErzsébet Nádasy – Gábor Wágner

University of VeszprémUniversity of Veszprém

Georgikon Faculty of Agricultural Georgikon Faculty of Agricultural SciencesSciences

Erzsébet Nádasy – Gábor WágnerErzsébet Nádasy – Gábor Wágner

University of VeszprémUniversity of Veszprém

Georgikon Faculty of Agricultural Georgikon Faculty of Agricultural SciencesSciences

DRY MATTER PRODUCTION DRY MATTER PRODUCTION OF GREEN PEA OF GREEN PEA INFLUENCED BY INFLUENCED BY

HERBICIDESHERBICIDES

DRY MATTER PRODUCTION DRY MATTER PRODUCTION OF GREEN PEA OF GREEN PEA INFLUENCED BY INFLUENCED BY

HERBICIDESHERBICIDES

INTRODUCTIONINTRODUCTIONINTRODUCTIONINTRODUCTION

Green pea is one of the most important vegetables in Hungary.

Chemical weed control has an important role in pea growing, because at the beginning of its development pea isn’t able to depress the weeds.

Time of sowing considerably determines the weed population of the field.

T2 life form weeds can germinate intensively at the same time when pea does.

Lately the representatives of T3 life form weeds can cause problem.

At the end of vegetation period, after falling down the lower leaves of pea T4 life form weeds can totally cover the field.

Weed flora of the pea field Weed flora of the pea field Weed flora of the pea field Weed flora of the pea field

Technology of weed control determines weed flora of the field, and the aim of pea growing.

Chemical weed control may carry out with:

presowing,

pre-emergent,

post-emergent herbicides

Chemical weed control of peaChemical weed control of peaChemical weed control of peaChemical weed control of pea

The aim of our experiment was to study the effect of five pre-emergent herbicides with different mode of action on the fresh and dry matter production and growing of a green pea variety.

MATERIALS AND METHODS MATERIALS AND METHODS MATERIALS AND METHODS MATERIALS AND METHODS

Pot experiment:

was carried out in April of 2003

under greenhouse conditions

each pot contained 1 kg air-dried soil

Twelve pieces of pea seeds were sown into each pot to 3 cm depth.

4 replications

Parameters of experimental soilParameters of experimental soilParameters of experimental soilParameters of experimental soil

Ramann’s brown forest soil from Keszthely

Humus (%) 2,05

mineral nitrogén (mg kg-1 soil) 23,37

Al-K2O (mg kg-1 soil) 140

Al-P2O5 (mg kg-1 soil) 160

pH-H2O 7,26

pH-KCl 6,48

maximal water holding capacity (mg kg-1 soil) 273

Examined pea variety Examined pea variety Examined pea variety Examined pea variety

„Rajnai törpe”

Herbicide treatments in the Herbicide treatments in the experimentexperiment

Herbicide treatments in the Herbicide treatments in the experimentexperiment

Examined parametersExamined parametersExamined parametersExamined parameters

We determined four weeks after sowing:

fresh mass

dry matter production

length

Statistical analysis was carried out by SPSS 7.5 software.

of the shoots and roots

RESULTS AND DISCUSSIONRESULTS AND DISCUSSIONRESULTS AND DISCUSSIONRESULTS AND DISCUSSION

Co

ntr

ol

Piv

ot

1L

ha

-1

Piv

ot

2L

ha

-1

Pro

po

nit

2L

ha

-1

Pro

po

nit

4

Lh

a-1

Se

nc

or

0,3

kg

ha

-1

Se

nc

or

0,6

kg

ha

-1

Sto

mp

4L

ha

-1

Sto

mp

8L

ha

-1

Afa

lon

Dis

pe

rsio

n

2L

ha

-1A

falo

n D

isp

ers

ion

4

Lh

a-1

0

2

4

6

8

10

12

fre

sh

ma

ss

(g

/po

t)

LSD5% 1.146

Fresh mass of shoots of pea due to Fresh mass of shoots of pea due to the herbicide treatmentsthe herbicide treatments

Fresh mass of shoots of pea due to Fresh mass of shoots of pea due to the herbicide treatmentsthe herbicide treatments

Fresh mass of roots of pea due to the Fresh mass of roots of pea due to the herbicide treatmentsherbicide treatments

Fresh mass of roots of pea due to the Fresh mass of roots of pea due to the herbicide treatmentsherbicide treatments

Con

trol

Piv

ot 1

Lha-

1

Piv

ot 2

Lha-

1

Pro

poni

t 2Lh

a-1

Pro

poni

t 4Lh

a-1

Sen

cor 0

,3kg

ha-1

Sen

cor 0

,6kg

ha-1

Sto

mp

4Lha

-1

Sto

mp

8Lha

-1

Afa

lon

Dis

pers

ion

2Lha

-1

Afa

lon

Dis

pers

ion

4Lha

-1

0,0

0,2

0,4

0,6

0,8

1,0

1,2

1,4

1,6

dry

mat

ter (

g/po

t)

LSD5% 0,172

Dry matter of shoots of pea due to Dry matter of shoots of pea due to the herbicide treatmentsthe herbicide treatments

Dry matter of shoots of pea due to Dry matter of shoots of pea due to the herbicide treatmentsthe herbicide treatments

Co

ntr

ol

Piv

ot

1Lh

a-1

Piv

ot

2Lh

a-1

Pro

po

nit

2L

ha-

1

Pro

po

nit

4L

ha-

1

Sen

cor

0,3k

gh

a-1

Sen

cor

0,6k

gh

a-1

Sto

mp

4L

ha-

1

Sto

mp

8L

ha-

1

Afa

lon

Dis

per

sio

n

2Lh

a-1

Afa

lon

Dis

per

sio

n

4Lh

a-1

0

0,1

0,2

0,3

0,4

0,5

0,6

0,7

0,8

0,9

dry

mat

ter

(g/p

ot)

LSD5% 0.158

Dry matter of roots of pea due to the Dry matter of roots of pea due to the herbicide treatmentsherbicide treatments

Dry matter of roots of pea due to the Dry matter of roots of pea due to the herbicide treatmentsherbicide treatments

Length of shoots of pea due to the Length of shoots of pea due to the herbicide treatmentsherbicide treatments

Length of shoots of pea due to the Length of shoots of pea due to the herbicide treatmentsherbicide treatments

Co

ntr

ol

Piv

ot

1Lh

a-1

Piv

ot

2Lh

a-1

Pro

po

nit

2L

ha-

1

Pro

po

nit

4L

ha-

1

Sen

cor

0,3k

gh

a-1

Sen

cor

0,6k

gh

a-1

Sto

mp

4L

ha-

1

Sto

mp

8L

ha-

1

Afa

lon

Dis

per

sio

n

2Lh

a-1

Afa

lon

Dis

per

sio

n

4Lh

a-1

0

2

4

6

8

10

12

14

16

len

gth

(cm

)

LSD5% 1.023

Length of main roots of pea due to Length of main roots of pea due to the herbicide treatmentsthe herbicide treatments

Length of main roots of pea due to Length of main roots of pea due to the herbicide treatmentsthe herbicide treatments

Co

ntr

ol

Piv

ot

1Lh

a-1

Piv

ot

2Lh

a-1

Pro

po

nit

2L

ha-

1

Pro

po

nit

4L

ha-

1

Sen

cor

0.3k

gh

a-1

Sen

cor

0.6k

gh

a-1

Sto

mp

4L

ha-

1

Sto

mp

8L

ha-

1

Afa

lon

Dis

per

sio

n

2Lh

a-1

Afa

lon

Dis

per

sio

n

4Lh

a-1

0

2

4

6

8

10

12

len

gth

(c

m)

LSD5% 1.276

The plants treated with Pivot developed uniformly, and produced the greatest dry matter, except the effect of double dose on the roots.

Sencor 70 WG strongly inhibited dry matter production and growth of pea and caused severe phytotoxic symptoms.

The effect of Proponit 840 EC was similar to that of Sencor.

Double dose of Stomp 330 also damaged the pea plants, but to a lesser extent than Sencor

In our investigation Afalon Dispersion was the other adequate herbicides for weed control besides Pivot.

CONCLUSIONSCONCLUSIONSCONCLUSIONSCONCLUSIONS

In our investigation Afalon Dispersion and Pivot proved to be the most suitable pre-emergent herbicides for weed control of green pea.

“Rajnai törpe” green pea wasn’t sensitive to these chemicals.

It is worth to be mentioned that permission of Pivot was cancelled in Hungary last year.

Thank you for your attention!

Thank you for your attention!