Multiple choice

Which of the following fungicides are used to control fungal diseases in apple? A. Methoxychlor B. Malathion C. Fenarimol D. Thiram E. Triadimefon

  1. A and B

  2. B and C

  3. A, B and D

  4. B, D and E

  5. A, B C, D and E
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

A general purpose tree fruit spray, available under a variety of trade names, is effective for control of many of the common diseases and insect pests of apple. This mixture usually contains captan as the fungicide component and methoxychlor and malathion or carbaryl as the insecticide component. Other alternative to control of fungal diseases are-

  1. coppers (fixed)- early season control of scab and fire blight;
  2. fenarimol- control of scab, mildew, and rust;
  3. ferbam- some control of scab, rust, black rot, and the summer diseases; causes undesirable black residue when used late in season;
  4. maneb, mancozeb- control of rust, scab, fruit rots, and summer diseases;
  5. myclobutanil- control of scab, powdery mildew and cedar-apple rust;
  6. sulfur- for control of mildew; some control of scab, summer diseases, and fruit rots; can be phytotoxic to some cultivars and may cause fruit russetting and/or yield reduction when sprayed after bloom;
  7. thiram- some control of scab, rust, and summer diseases;
  8. thiophanate-methyl- control of scab, fruit rots, and summer diseases;
  9. triadimefon- very good control of powdery mildew and rust.

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