Spring Bean Agronomy Guide Varieties Fuego &...
Transcript of Spring Bean Agronomy Guide Varieties Fuego &...
Spring Bean Agronomy Guide
Varieties Fuego & Fanfare
Sowing Rate
Assuming 90% establishment with the optimum plant population of 30 – 35 plants per
square metre. In order to calculate the seeding rate the formula below can be used:
T.S.W X Target Plant Population/ Square Metre x ____100____ __ = Seed Rate (kg/ha)
% Germination 100 – field loss
TGW
Seed Rate kg/ha
Adjustment for field loss –
Seed Rate (kg/ha) Stone/Acre
400 126.3 140.4 9.0
450 142.1 157.9 10.1
500 157.9 175.4 11.3
550 173.7 193.0 12.4
600 189.5 210.5 13.5
650 205.3 228.1 14.7
700 221.1 245.6 15.8
750 236.8 263.2 16.9
800 252.6 280.7 18.0
Target Sowing Date 1th February 2016 – 31st March 2016
Fertiliser
The optimum pH is between 6.5 –
7. Medium to heavy soils allow
good root development and will
usually retain enough moisture to
meet the needs of the crop. Very
light soils should be avoided. It is
important the levels of manga-
nese (Mn), magnesium (Mg) bo-
ron (B) and sulphur (S) are ade-
quate.
Soil
Index
N
P
K
Index 1 0 50 125
Index 2 0 40 60
Index 3 0 20 40
Index 4 0 None None
P and K requirements (kg/ha) for beans:
Typical fertiliser application rate based on soil index 2:
Date Applied Product Rate/ha
Pre - sowing 0 – 7 – 30 or 0 – 10 – 20 375 kg/ha
Ref: Target population x 30 plants/m2, germination 95% & field loss 10%
Weed Control
Beans are very susceptible to weed competition especially in their early stages of
growth, therefore a good weed control programme is essential.
Nirvana (pendimethalin 250 g/l + imazamox 16.7 g/l), Defy
( prosulfocarb 800 g/l) or Lingo (linuron 250 g/l + clomazone 45
g/l) are applied as a pre-emergence option and should not be
applied to broadcast crops. Pre – emergence herbicides
should be applied within 48 hours of planting to a fine, firm &
level seedbed.
Grass-Weed Control
post emergence Stra-
tos Ultra (cycloxydim
100 g/l) can be ap-
plied from 3 node
stage of the crop until
before the crop cano-
py prevents adequate
spray penetration.
Wild Oat Control options include Fusilade Max (Fluazifop – P (-butyl) 125 g/l) at which
can be applied from the four true leaf stage or Falcon Propaquizafop 100 g/l) which
can be applied before the flower buds are visible.
Crop Protection
Application Date Weed Chemical
Pre – emergence
Broadleaved
weeds
Nirvana
Lingo
Defy
Post - emergence Grass Weeds Stratos Ultra
Before first flower buds
visible
Wild Oats Fusilade Max
Falcon
Disease Control The main diseases which attack beans are:
Chocolate Spot (Botrytis fabae, B. cinerea)
Symptoms appear as brown spots, which en-
large to give a more damaging aggressive
phase in cool, wet or damp weather. Au-
tumn sown beans are more likely to suffer
yield losses, especially where the plant popu-
lation is high and the crop becomes tall.
Chemical application: Signum or Folicur
Ascochyta (Leaf and Pod Spot)
This produces brown spots containing distinc-
tive black fruiting bodies (pycnidia). Autumn
sown beans are more prone to serious at-
tacks especially in wet conditions. The dis-
ease is seed-borne, air-borne and splash dis-
persed. It is advised to use certified seed
only.
Downy Mildew (Peronospora viciae)
Mildew causes white - greyish pustules on the
under-surface of the leaves and is prevalent
on spring beans. As mildew pustules become
older they darken to a brown colour.
Chemical application: Ridomil Gold
Rust (Uromyces fabae)
Rust is characterised by numerous small red-
dish-brown pustules on the leaves. It is more
serious on spring beans and all varieties are
susceptible. Most damage occurs if infection
begins during flowering and pod set.
Chemical application: Amistar, Folicur
Pest Control Pea and Bean Weevil
Pea and bean weevil is a grey/brown weevil with characteristic
snout. It feeds on leaves, producing u shaped notches but it is its lar-
vae that produce most of the yield reductions in beans. They dra-
matically reduce root nodule formation and thus nitrogen fixation.
Black bean aphid – Aphis fabae
Black bean aphids migrate to bean and sugar beet crops in the summer. Damage mainly
caused by aphid populations which colonise plants prior to flowering.
Apply spray if aphids are seen evenly (>5% of plants) across the field
as the aphid normally colonises a few plants in an area which is of little
consequence. .
Desiccant at harvesting options
Bean crops can be desiccated 7 – 21 days prior to harvest with Reglone or Roundup. If
a crop has a high level of weeds present or has a few small late set pods which are still
green, a desiccant can aid harvesting. It should be applied when at least 90% of pods
are dry and black and most of the beans are dry.
Date Applied Product Rate/ha
Pre – harvest Reglone 3.0 l/ha
Pre – harvest Roundup Flex 3.0 l/ha
This guide has been put together as a reference. If you need to seek clarification please
do not hesitate to contact us directly on the numbers below:
Aidan Moore – +353 (0)87 254 7171
Marianne Jordan – +353 (0)86 022 4090
Seedtech Office - +353 (0)51 832 814
Disclaimer
The information given in this document is for general guidance only. Whilst every care has been taken to ensure i t is
accurate, i t is important to check all information with your agronomist first.