Greenhouse Management Online

Growth retardants used on greenhouse crops reduce internode elongation by inhibiting the synthesis of which group of plant growth substance?
1. Auxins
2. Abscisic acid
3. Cytokinins
4. Gibberellins
5. None of the above
What is the active ingredient in B-nineR?
1. Chlormequat chloride
2. Ancymidol
3. Daminozide
4. Paclobutrazol
5. Uniconazole
What is the active ingredient in A-restR?
1. Chlormequat chloride
2. Ancymidol
3. Daminozide
4. Paclobutrazol
5. Uniconazole
What is the active ingredient in BonziR?
1. Chlormequat chloride
2. Ancymidol
3. Ethephon phosphoric acid
4. Paclobutrazol
5. Uniconazole
What is the active ingredient in SumagicR?
1. Chlormequat chloride
2. Ancymidol
3. Daminozide
4. Paclobutrazol
5. Uniconazole
What is the active ingredient in FlorelR?
1. Ethephon phosphonic acid
2. Ancymidol
3. Daminozide
4. Paclobutrazol
5. Uniconazole
What is the active ingredient in CycocelR?
1. Chlormequat chloride
2. Ancymidol
3. Daminozide
4. Paclobutrazol
5. Uniconazole
What would be a reasonable or expected foliar application rate for B-nineR?
1. 25
2. 250
3. 2,500
4. 25,000
5. None of the above
What would be a reasonable or expected foliar application rate for CycocelR?
1. 2
2. 20
3. 200
4. 2000
5. None of the above
What would be a reasonable or expected foliar application rate for A-restR?
1. 1
2. 100
3. 1,500
4. 3000
5. None of the above
What would be a reasonable or expect foliar application rate for BonziR?
1. 50
2. 500
3. 5000
4. 50,000
5. None of the above
The application of FlorelR to a plant results in the production of which plant growth substance?
1. Auxin
2. Gibberellin
3. Ethylene
4. Cytokinin
5. None of the above
If a greenhouse crop is grown in a greenhouse in which the day temperature is maintained at 65oF and the night temperature is maintained at 70oF, what is the "DIF" treatment or condition that the crop is experiencing?
1. 0
2. +5
3. -5
4. +10
5. -10
Which is (are) a non-chemical method of height control of greenhouse crops?
1. Water stress
2. Nutritional stress
3. Physical stress
4. None of the above
5. All of the above
How many ml of BonziR are required to make 1 liter of solution that contains 20 ppm of the active ingredient?
1. 5
2. 10
3. 15
4. 20
5. 25
How many ml of CycocelR are required to make 1 liter of solution that contains 2000 ppm of the active ingredient?
1. 5
2. 10
3. 17
4. 20
5. 25
How many liters of A-restR are required to produce 1000 liters of solution that contain 200 ppm of the active ingredient?
1. 7
2. 17
3. 75
4. 758
5. 7500
How many liters of BonziR are required to produce 100 gallons of solution that contain 50 ppm of the active ingredient. There are 3.78 liters in 1 gallon.
1. 1
2. 2.2
3. 4.7
4. 14.7
5. 47
How many liters of A-Rest would be required to produce enough solution to drench 4000 containers, applying 100 ml per container, and provide 0.25 mg a.i. (ancymidol) per container?
1. 3.8
2. 4.8
3. 8.3
4. 8.5
5. 9.5
How many liters of A-Rest would be required to produce enough solution to drench 10,000 containers, applying 150 ml per container, and provide 0.25 mg a.i. (ancymidol) per container?
1. 3.8
2. 4.8
3. 8.3
4. 8.5
5. 9.5

Greenhouse Management Online

Unit 10Plant Growth RegulatorsSelf-Test

Unit 10

Plant Growth Regulators

Self-Test