Plant Variety Journal - IP Australia

Details of Application
Application Number 2007/284
Variety Name ‘BlackStallion’
Genus Species Vigna unguiculata
Common Name Cowpea
Synonym Nil
Accepted Date 22 Nov 2007
Applicant B.W. Algate & Co Pty Ltd trading as J.W. Koek & Company,
Blue Ribbon Seed & Pulse Exporters Pty Ltd & Champion
Seeds Pty Ltd
Agent N/A
Qualified Person Donald S. Loch
Details of Comparative Trial
Location Cleveland, QLD (27°32?S, 153°15'E).
Descriptor Cowpea (Vigna unguiculata) PBR COWP.
Period 16 Feb – 27 May 2008.
Conditions Seeds sown on 16 Feb 2008 in 40 x 40mm tubes (one seedling
per tube); watered with a slurry of cowpea inoculant.
Seedlings planted out on a red volcanic (ferrosol) soil on 5-6
Mar 2008 arranged in plots each consisting of 3 rows with 7
seedlings per row; plants not defoliated; weed control by preplant-incorporated
trifluralin (Trifluralin) @ 2.1 L/ha plus
subsequent manual roguing; 571 kg pre-plant Q5 mixed
fertiliser (N:P:K:S = 5.3:5.8:5.0:13.3) applied and
incorporated on 5 Mar 2008, giving 30.3 kg N, 33.1 kg P,
28.6 kg K, and 76.0 kg S per hectare. Sprayed to control
aphids and cutworms with pirimicarb (Piramor WG) +
chlorpyrifos (Lorsban 500EC) on 19 Mar 2008. Sprayed to
protect flowers and pods with thiodicarb (Larvin 375) +
dimethoate (Dimethoate) + imidacloprid (Spectrum 200SC)
on 23 April, 10 May and 25 May 2008.
Trial Design Individual plots consisted of 3 rows (a central datum row
surrounded by a guard row on either side) each with 7 plants,
including 2 guard plants at the outer ends of the central datum
row. Measurements were taken from sixty (60) spaced plants
of each cultivar (‘BlackStallion’, ‘Ebony PR’) arranged in
twelve (12) randomised blocks with five (5) plants per plot
located in the central datum row; 50 cm plant spacing within
and between plot rows; 1.5 m between plots.
Measurements Numbers of lateral branches were counted on each of the 60
datum plants on 15 Apr 2008; date of first flowering on each
plant was determined progressively (6-24 Apr 2008); leaf
characteristics were measured on 24 Apr 2008 (one trifoliate
leaf per plant sampled from the 5th visible node below the
apex of the main stem); flowers (standard petal width)
measured on 23 Apr 2008 (‘BlackStallion’) and 27 Apr 2008
(‘Ebony PR’); inflorescence, pod and seed measurements
were taken 27 May 2008 (one inflorescence and 2 pods per
plant).
Page 198 of 550
Plant Varieties Journal Vol. 21 No.3