Results
We hope you enjoyed the quiz and learned something!
See how your score matches up…
1-3: You need to do a few more of these quizzes to become a field diagnostics expert.
3-5: You have made a start in your field diagnostics but there is some way to go…
5-7: You are getting more right than wrong so keep on learning!
7-9: Impressive you are getting pretty experienced in your field diagnostics!
10: Well done! But make sure you do the quiz again next month.
We hope you enjoyed the quiz and learned something!
See how your score matches up…
1-3: You need to do a few more of these quizzes to become a field diagnostics expert.
3-5: You have made a start in your field diagnostics but there is some way to go…
5-7: You are getting more right than wrong so keep on learning!
7-9: Impressive you are getting pretty experienced in your field diagnostics!
10: Well done! But make sure you do the quiz again next month.
#1. What does reddening in the leaves of crop plants indicate?
The correct answer is:
Generalised stress.
Reddening (just as with yellowing) is often a sign of generalised stress. This may be due to a variety of factors, for example, abiotic pathogens and insect feeding. Phosphate deficiency will often cause reddening of the lower leaves and can be diagnostic but that is not the only problem that induces this effect.
The incorrect answers were:
Definitely indicates a deficiency of phosphate
This is a common symptom of P deficiency but is not the only cause of reddening.
Insect larvae within the stem
The stress caused by insect feeding will often cause reddening of the upper leaves but many other problems will do this too.
Root problem of some sort
Root problems may cause stress, leading to reddening, but that is not always the case.
