Bright’s Hybrid® (selection 5) is an advanced selection of one of the most popular peach/almond hybrid rootstocks. Bright’s Hybrid®5 is moderately vigorous for a peach-almond hybrid, nematode resistant, deep rooting, well anchored, and drought tolerant. Vigor and productivity are superior to Nemaguard. The anchorage is similar to other well-anchored peach almond hybrids. It has excellent Rootknot Nematode resistance. Clonal propagation of this rootstock provides more uniform growth and performance than Bright’s Hybrid® from seed. This selection was a survivor in an orchard with high pH due to excess calcium.

Bright’s Hybrid®5(cv. Arthur V) USPP# 18,782

PARENTAGE: Peach x Almond hybrid

ORIGIN: Bright’s Nursery, Inc., Le Grande, CA

OLDEST TEST SITES IN THE US: 2004 in California with Almonds

COMPATIBILITY: Almonds, peach, plum (European and Japanese), and apricots.

VIGOR: In good peach soil, 120% of Nemaguard.

GROWTH UNIFORMITY: Excellent. Rootstock is clonally propagated, not seed propagated.

ROOTSTOCK INDUCED TREE FORM: More spreading than Nemaguard.

ANCHORAGE: Good, similar to other peach x almond rootstocks.

YIELD EFFICIENCY: With almond, yield efficiency is similar to Nemaguard.

SUCKERING: Produces virtually no suckers.

CHILLING REQUIREMENT: Appears similar to Nemaguard.

COLD HARDINESS: Unknown

NEMATODE RESISTANCE: Excellent resistance to Rootknot Nematode. Low susceptibility to Lesion Nematode. Ring Nematode resistance is unknown, but not likely present.

EFFECT OF ROOTSTOCK ON BACTERIAL CANKER SUSCEPTIBILITY: Unknown. Presumed to be more susceptible than Nemaguard.

OAK ROOT FUNGUS TOLERANCE: Untested

PHYTOPHTHORA SENSITIVITY: Unknown

VERTICILLIUM RESISTANCE: Good

ASPHIXIA TOLERANCE: Unknown

DROUGHT TOLERANCE: Due to deep rooting, it is presumed to have some drought tolerance

CROWN GALL SUSCEPTIBILITY: Unknown, but not extreme.

HIGH PH TOLERANCE: Selected as a survivor in an orchard with high pH due to excess calcium.

CALCAREOUS SOIL TOLERANCE: Good.

REPLANT DISORDER SUSCEPTIBILITY: Good. Similar to Hansen 536

PROPAGATION METHODS: In Vitro culture.

Bright’s Hybrid®5 Rootstock (cv.Arthur V) USPP#18,782 P3

Esparto Tree Spacing 18 x 22 NoNparEil lbS. NuTmEaT/acrE ROOTSTOCK TOTAL

Bright’s Hybrid®5 298 Nickels 281 Rootpac-R® 210 FXA 206 Hansen 536 182 Viking 177 Lovell 138 Krymsk®86 84 Titan 196

•High Yielding, Moderate Vigor Peach-Almond Hybrid•Tolerates Salty, Alkaline Soils

•Replant Tolerant•Good Anchorage

Cumulative Almond Yields on Bright’s Hybrid®5 Rootstock

Yolo County 3rd Leaf Nonpareil Almond Yield lbs/

acremadera lbS. NuTmEaT/acrE

ROOTSTOCK TOTAL

Nemaguard Nonpariel 1257 812 2069 Nemaguard Monterey 1585 1766 3373

Bright’s Hybrid®5 Nonpariel 1369 1456 2825 Bright’s Hybrid®5 Monterey 1545 2114 3659

Hansen Nonpariel 1333 1444 2777 Hansen Monterey 1620 2065 3885

Williams Tree Spacing 18 x 22 NoNparEil lbS. NuTmEaT/acrE ROOTSTOCK 4TH 5TH TOTAL

Lovell 1,599 1,727 3,326 Bright’s Hybrid®5 2,387 2,359 4,746 Empyrean®1 2,194 2,732 4,926 Krymsk®86 2,013 2,408 4,421 Rootpac-R® 1,387 2,066 3,472

•Adapted to Medium Texture & Lighter Soils

1200

1700

2200

2700

3200

3700

Nonpareil

Almond Nutmeat Yield lbs/ac.

2069

28252777

3373

3695

Monterey

3685

Brig

ht’s

Hyb

rid®

5

Hans

en 5

36

Nem

agua

rd

Brig

ht’s

Hyb

rid®

5

Hans

en 5

36

Nem

agua

rd

0

50

100

150

200

250

300

Bright’s

Hybrid

® 5

Nickels

Rootpac

-R

Hanse

n 536

FXA

Viking

Love

llTita

n

Krym

sk®86

Yolo County 3rd LeafNonpareil Almond Yield lbs./ac298

281

210 206182 177

138

84

196

Franz Niederholzer UCCE

Replant Disorder Test Results

Stem

diam

eter in

creas

e (mm

)

Lovell

Nemagu

ardBHOK 1

BHOK 10

BHOK 28

BHOK 32

BHOK 50

Empyr

ean® 1

Bright’s

Hybrid® 5

Bright’s

HYBRID®

106

Garnem

15

Hansen

536

Hansen

536-OR*

Control

ler 5

Krymsk® 1

Krymsk® 2

Krysmk® 9

Krymsk® 86

Tempro

pac*

PAC 9908

-02

Replan

tpac*Myro

bol

Marianna

2624

Greg Browne, USDA

Non-fumigated Fumigated35

30

25

20

15

10

5

0

0

1500

2500

3500

4500

5500

Nonpareil Almond Yield lbs./acre Nonpareil lbs Nutmeat/acre

3326

4746 4926

4421

3472

Lovell Bright’s Hybrid®5 Empyrean®1 Krymsk®86 Rootpac-R®