WEL-COME

2

Effect of PGR’s on

Cucurbits

Presented byPAWAN KUMAR NAGAR

M.Sc. (Fruit science)

Cucurbits1. Water melon2. Musk Melon3. Cucumber4. Bitter gourd5. Bottle gourd6. Pumpkin7. Sponge gourd8. Ridge gourd9. Ivy gourd10. Pointed gourd

Major cucurbits

Cucumber Bitter gourd

Musk melon Sponge gourd Water melon

Different type of flowers

Sex Forms in Cucurbits1. Monoecious

2. Gynoecious 3. Androecious 4. Dioecious 5. Andromonoecious 6. Gynomonoecious7. Trimonoecious 8. Hermaphrodite

Effect of Plant growth Regulators

Increase fruit sizeIncrease No. of Male flowersIncrease No. of female flowersIncrease YieldsInduce Parthenocarpy

Induction of Staminate & Pistillate flowers

Silver nitrate (AgNO3)Silver thiosulphate [Ag(S2O2)2]Gibberelic acid

Mallic Hydrazide (MH)Cycocel (CCC)NAA, Etherel

Male flower

Female flower

Growth Regulator sprays

GA₃ 10 - 25 ppm –

Two sprays

♀ 2 leaf stage

4 leaf stage

3 ppm of Mo3 ppm of Boron

100 ppm of NAA25 – 100 ppm MH

No. of ♀ flowersfruit set

ultimate yieldsNo.of ♂ flowers

Role of Growth Regulators

Ethylene precursor Ethylene

Male receptor

Female receptor ♀

♂

AgNO3

Inducing

Inhibiting

AgNO3

GA3

Effect of Plant growth Regulators

NAA,Ethylene = Increase No. of Female flowers

GA, AgNO3 = Increase No. of female flowers

Increase YieldsTIBA = Induce Parthenocarpy

Increase in Flower & Fruit Size

Increase in Flower & Fruit Size

Effect on Cucurbits

S.N. CROP GROWTH REGULATORS ATTRIBUTES(INCREASE)

1. Water melon TIBA 25-50 ppm Fruit Yields

2. Musk melon Etherel 250 ppm Fruit Yields

STS 300-400 ppm Male flowers

3. Cucumber MH100 ppm Female flowers

4. GA 1500-2000 ppm Male flowers

5. GA 10-20 ppm Female flowers

6. Bottle gourds TIBA, MH, Etherel 400 ppm Fruit set

7. Bitter gourds MH-150,GA-60,Etherel-25 ppm Female flowers

8. Round melon MH 50 ppm Female flowers

9. Musk melon CCC-50 ppm Salt tolerance

THANK YOU

“Cucurbits-Everyone’s Crop”