field bean

LABLAB• FLORAL BIOLOGY

• SELFING

• EMASCULATION

• CROSSING

BY

MANJUNATH HARTI

Jr M.Sc (agri)

ID NO-PAK 9211

DEPT OF GPB 2

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• Scientific Name :Dolichos lablab (L).

• Family : FABACEAE

• Chromosome No. : 2n = 2x = 22

TAXONOMY

• Botanical name : Dolichos lablab

• Order :Fabales

• Family :Fabaceae

• Sub-family :Faboideae

• Genus :Dolichos

• Tribe :Phaseoleae

• Sub-tribe :Faboideae

• Species :Lablab

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USES

The crop is multipurpose.

• Grown for its young pods .

• Dry seeds are used in many preparation.

• As fodder

• As green manure

• As cover crop

• As ornamental in USA

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• Is a native to India or South-East Asia. It is probably of an Asian origin and has been under cultivation since ancient times. Its wild forms are found in India

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• D. lablab

• D. purpureus

• D. albus

• D. cultratus

• D. bengalensis

• D. lablab var

hortensis

• D. lablab var

muschler

• D. lablab var

schweinf

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FLORAL

BIOLOGY

FLORAL

MORPHOLOGY

FLORAL

ANTHESIS

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• Infloresence is a stiff axillary raceme with many flowers.

• Flowers 1-5 together form tubercles on rachis.

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• Flowers are in various colours.

• In clusters of 4-5.

• Two large basal bracts.

• Stamens are diadelphous(9+1)

• Stigma is capitate & glandular

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• Starts in morning around 6 am and continues till 11 am

• Maximum flower opening – 11am to 5 pm

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• Essentially a Self Pollinated crop was chasmogamy.

• Self pollination varies between 94 - 99%

• But 6-10% Natural Cross pollination have been reported depending on

• Temperature

• Insect population & activity at flowering time

• Planting design

• Plant population

• Wind velocity & direction

• Genotypic nature

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• Bagging of young bud

• In this crop 6-10% cross pollination is observed.

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• Includes

• Emasculation

• Artificial pollination

• Bagging

• Taging

• It is the removal of male part from the bisexual flower.

• Use sharp forceps & needles.

• A cut with thumb is made on the ventral side to 2/3 of the bud and tips are clipped off

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CROSSING

• Take well opened flower.

• Gently push the back of the flower & get the pollens.

• Then put pollens on emasculated flower.

• Then bag it.

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• Success rate – 33%

• Depends upon temperature and humidity

• Emasculation carried out before noon

• Pollinate the emasculeted flowers on the same day or following day.

VARIATION

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IMPROVED VARIETIES• Rongai

• Highworth

• Koala

• Endurance

• HA-4

• Hebbal avare-1

• Hebbal US.67-31

• Hebbal avare-4

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