Growth Substances (PGR) for Tomato

Use of Growth Substance (PGR) in Tomato

The growth substances play definite role in the production of tomato.

What is a growth substance?

A plant growth substance may be any plant nutrient or a plant growth regulator. These substance, especially plant growth regulators play a major role in growth, flowering, fruiting and yield of tomato plant.

Different growth substances or plant growth regulators (PGR) for tomato

IBA
IAA
NAA
PCPA
2, 4-D
GA3
ABA
Alar (B9)
CCC
Ethrel

Also read: Tomato Wilt: Causal Organism, Damage and Control

Role of IBA in tomato
Role of IAA in tomato
Role of NAA in tomato
Role of PCPA in tomato
Role of 2, 4-D in tomato
Role of GA3 in tomato
Role og ABA in tomato
Role of Alar (B9) in tomato
Role of CCC in tomato
Role of Ethrel in tomato.

Also read: Preparation of Tomato Nursery in Net House

01: IBA

Concentration: 25-50 PPM
Method of application: Seedling soaking for 15 minutes
Effect: Reduced mortality, increased number of leaves, dry weight and total yield

02: IAA

Concentration: 30 PPM
Method of application: Seed treatment
Effect: Increased fruit yield

03: NAA

3.1: Concentration: 15 PPM
Method of application: Foliar spray
Effect: Improved fruit quality and seed content

3.2: Concentration: 200 PPm
Method of application: 3 foliar spray at 15 days interval on leaf curled infected plants
Effect: Increased plant height, and gave highest number and weight of fruit per plant

3.3: Concentration: 25-50 PPM
Method of application: Foliar spray
Effect: Improved flower primordial formation, and increased yield

3.4: Concentration: 20 PPM
Method of application: Seedling root dip
Effect: Increased protein content

3.5: Concentration: 40 PPM
Method of application: Foliar spray
Effect: Increased TSS content

3.6: Concentration: 15-25 PPM
Method of application: Sees soaking and foliar spray 30 days after planting
Effect: Improved fruit set

3.7: Concentration: 5-10 PPM
Method of application: Foliar spray
Effect: Enhanced earliness and fruit set

3.8: Concentration: 25 PPM
Method of application: Foliar spray
Effect: Highest yield

3.9: Concentration: 100 PPM
Method of application: Foliar spray
Effect: Highest vitamin C content

04: PCPA

Concentration: 25 PPM
Method of application: Foliar spray
Effect: Increased fruit set and erly yield

05: 2,4-D

5.1: Concentration: 5 PPM
Method of application: Foliar spray
Effect: Reduced leaf area

5.2: Concentration: 5 PPM
Method of application: Seed soaking
Effect: Increased TSS and yield

5.3: Concentration: 5 PPM
Method of application: Whole plant spray
Effect: Increased acidity and vitamin C content of fruits

06: GA3

6.1: Concentration: 200 PPM
Method of application: The foliar spray at 15 days interval on leaf curled infected plants
Effect: Increased plant height, and gave highest number and weight of fruit per plant

6.2: Concentration: 5 PPM
Method of application: Foliar spray
Effect: Increased dry matter and yield

6.3: Concentration: 25 PPM
Method of application: Foliar spray
Effect: Increased shoot length and number of fruits per plant by increasing the activities of endogenous auxin, gibberellin like substances and cytokinins

6.4: Concentration: 50 PPM
Method of application: Seedling dip
Effect: Increased number of fruits per plant and yield

07: ABA

Concentration: 5 PPM
Method of application: Foliar spray
Effect: Increased fruit yield by increasing number of fruits per plant and mean fruit weight

08: Alar (B9)

8.1: Concentration: 1500 PPM
Method of application: Foliar spray
Effect: Increased fruit weight and yield

8.2: Concentration: 5 mM (total 280.6 mg/ha)
Method of application: 7 foliar spray at weekly interval
Effect: Delayed wilting by 4 days

09: CCC

9.1: Concentration: 5 mM (total 280.6 mg/ha)
Method of application: 7 foliar spray at weekly interval
Effect: Early flowering and reduced stomatal opening by 80% and delayed wilting by 4 days

9.2: Concentration: 2000 PPM
Method of application: Foliar spray
Effect: Increased frost resistance in seedlings

9.3: Concentration: 1500 PPM
Method of application: Foliar spray
Effect: High ascorbic acid content

9.4: Concentration: 2000 PPM
Method of application: Foliar spray
Effect: Earliness, increased no of fruits per plant and total yield

10: Ethrel

10.1: Concentration: 500 PPM
Method of application: Foliar spray when 10% fruits are pink
Effect: Promoted ripening in 10 days, induced 55-65% fruits to ripen at second harvest.

10.2: Concentration: 500 PPM
Method of application: Single application of Ethephon at various stages of fruit ripening
Effect: Increased total yield and percentage of ripe fruits.

10.3: Concentration: 500 PPM
Method of application: Spraying 15-35 days after anthesis
Effect: Reduced ripening period by 7 days in a greenhouse crop.

10.4: Concentration: 0.8-1.6 lb/acre
Method of application: Application 42 days after pollination
Effect: Accelerated fruit ripening and concentrated fruit harvest

10.5: Concentration: 1.6-2 kg/acre
Method of application: Application of Ethephon at fruit maturity
Effect: Ripening earlier by 6-8 days and red fruits increased by 28-34%.

References

01: Chhonkar and Ghufran (1968)
02: Mozarkar et al. (1991)
3.1: Prasad and Prasad (1977)
3.2: Reddy and Yaragutaiah (1980)
3.3: Oenofeghara (1981)
3.4: Chaubey and Chaturvedi (1982)
3.5: Phookan et al. (1991)
3.6: Kar et al. (1993)
3.7: Singh (1995)
3.8: Akhtar et al. (1996)
3.9: Akhtar et al. (1996)
04: El-Bellagy et al. (1984)
5.1: Joseph and peter (1980)
5.2: Singh and Singh (1996)
5.3: Singh and Singh (1996)
6.1: Reddy and Yaragutaiah (1980)
6.2: Mohan and Sinha (1988)
6.3: Amer et al. (1996)
6.4: Tomar and Ramgiry
07: Amer et al. (1996)
8.1: Dimri et al. (1988)
8.2: Mishra and Pradhan (1972)
9.1: Mishra and Pradhan (1972)
9.2: Singer et al (1988)
9.3: Phookan et al. (1991)
9.4: Ibrahim et al. (1996)
10.1: Splittstoesser and Vandemark (1971)
10.2: Dostal and Wilcox (1971)
10.3: Iwahori and Lyon (1969)
10.4: Sims and Kasmire (1972)
10.5: Baranov (1981)

Keywords:

Tomato leaf curl virus treatment, seed treatment of tomato, flower drop control in tomato, fruit drop control in tomato, fruit drop problem, flower drop problem, delaying wilt in tomato, wilt management, green house cultivation, fruit ripening.