Iha Education October Webinar - Syngenta - Fungicides
This Quiz was created to review the Syngenta webinar presentation on October 15th 2009.
- 1.
Temperatures most favorable for Downy Mildew development are:
- A.
35 - 55 F
- B.
50 - 72 F
- C.
65 - 85 F
- D.
None of the above
Correct Answer
B. 50 - 72 FExplanation
Downy Mildew is a fungal disease that affects plants, particularly during periods of cool and wet weather. The temperatures most favorable for Downy Mildew development are between 50 - 72 F. This range provides the ideal conditions for the growth and spread of the fungus. Temperatures below 50 F or above 72 F are less suitable for the disease to thrive. Therefore, the correct answer is 50 - 72 F.Rate this question:
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- 2.
Crops that are most prone to Downy mildew include:
- A.
Begonia, Pentas, Lantana, Buddleia, Poinsettia
- B.
Dahlia, Penstemon, Heuchera, Geraniums, Bergenia
- C.
Phlox, Rose, Salvia, Coleus, Buddleia, Alyssum
- D.
Petunia, Marigold, Chrysanthemum, Zinnia, Ageratum
Correct Answer
C. Phlox, Rose, Salvia, Coleus, Buddleia, AlyssumExplanation
The crops that are most prone to Downy mildew are Phlox, Rose, Salvia, Coleus, Buddleia, and Alyssum.Rate this question:
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- 3.
Symptoms of Downy Mildew infections include:
- A.
Yellow, tan or reddish blotch areas on the topside of the leaves
- B.
Distorted new growth
- C.
Fuzzy mat-like growth on the underside of the leaves
- D.
All of the above
- E.
A & B
Correct Answer
D. All of the aboveExplanation
The correct answer is "All of the above". This means that all the symptoms mentioned in the question are symptoms of Downy Mildew infections. These symptoms include yellow, tan or reddish blotch areas on the topside of the leaves, distorted new growth, and fuzzy mat-like growth on the underside of the leaves.Rate this question:
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- 4.
All Downy Mildew fungi are capable of infecting all ornamental crops:
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
Downy Mildew fungi are a diverse group of fungi that can infect a wide range of plants, including ornamental crops. However, not all Downy Mildew fungi are capable of infecting all ornamental crops. Different species of Downy Mildew fungi have specific host ranges and can only infect certain plants. Therefore, the statement that all Downy Mildew fungi are capable of infecting all ornamental crops is false.Rate this question:
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- 5.
Both Downy Mildew and Botrytis thrive when the relative humidity is:
- A.
Greater than 85%
- B.
Greater than 95%
- C.
Lower than 75%
- D.
Relative humidity does not affect these fungal pathogens
Correct Answer
A. Greater than 85%Explanation
Both Downy Mildew and Botrytis are fungal pathogens that thrive in high humidity conditions. A relative humidity greater than 85% provides the ideal environment for these pathogens to grow and spread. In such conditions, the spores of these fungi are more likely to germinate and infect plants, leading to disease development. High humidity creates a moist environment that favors the growth and multiplication of these pathogens, allowing them to cause damage to plants. Therefore, a relative humidity greater than 85% is conducive for the growth and spread of Downy Mildew and Botrytis.Rate this question:
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- 6.
A fungicide rotation for prevention of Downy Mildew would include:
- A.
Chipco 26019, Eagle/Hoist, Decree, Cleary’s 3336/OHP6672
- B.
Heritage, Subdue Maxx, Stature SC, Protect DF/Dithane 75DF
- C.
Daconil, Medallion, Subdue Maxx, Terraguard
- D.
Strike, Banner Maxx, Decree, Medallion
Correct Answer
B. Heritage, Subdue Maxx, Stature SC, Protect DF/Dithane 75DF -
- 7.
Botrytis spores occur naturally in many growing environments and threaten crops when conditions are:
- A.
Hot and Dry
- B.
Cool and Wet
- C.
Hot and Wet
- D.
Warm and Dry
Correct Answer
B. Cool and WetExplanation
Botrytis spores occur naturally in many growing environments and threaten crops when conditions are cool and wet. This is because Botrytis, also known as gray mold, thrives in cool and moist conditions. These conditions create the perfect environment for the spores to germinate and spread, leading to the infection and damage of crops.Rate this question:
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- 8.
Botrytis can infect:
- A.
Roots
- B.
Stems, old leaves and flowers
- C.
Young shoots and emerging leaves
- D.
All of the above
- E.
B & C
Correct Answer
E. B & CExplanation
Botrytis can infect young shoots and emerging leaves, as well as stems, old leaves, and flowers. This means that it can affect all of the options given in the question, which are B & C.Rate this question:
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- 9.
The best way to prevent infections by Botrytis:
- A.
Reduce relative humidity below 85%
- B.
Space plants for good air movement
- C.
Apply appropriate preventive fungicide treatments after pinching or prior to storage or shipping when conditions are conducive for disease development
- D.
All of the above
Correct Answer
D. All of the aboveExplanation
The best way to prevent infections by Botrytis is to implement all of the mentioned measures. Reducing relative humidity below 85% helps create an environment that is less favorable for the growth of the fungus. Spacing plants for good air movement ensures that there is proper ventilation, making it harder for the fungus to thrive. Applying appropriate preventive fungicide treatments after pinching or prior to storage or shipping when conditions are conducive for disease development provides an additional layer of protection against Botrytis. Therefore, implementing all of these measures together is the most effective way to prevent infections by Botrytis.Rate this question:
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- 10.
A fungicide rotation for prevention of Botrytis will include:
- A.
Stature SC, Kocide, Subdue Maxx, Dithane
- B.
Decree, Medallion, Daconil, Chipco
- C.
Terraguard, Banner Maxx, Eagle, Aliette
- D.
All of the above
- E.
A & C
Correct Answer
B. Decree, Medallion, Daconil, ChipcoExplanation
The correct answer is Decree, Medallion, Daconil, Chipco. These fungicides are included in a rotation for prevention of Botrytis. Botrytis is a fungal disease that affects various plants and crops. Rotating different fungicides helps prevent the development of resistance in the Botrytis population, ensuring effective control of the disease. Decree, Medallion, Daconil, and Chipco are all effective fungicides that can be used in rotation to manage Botrytis.Rate this question:
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