Question

Correct sequence of herbicide resistant cases in following crops:

• A. Rice > wheat > maize > soybean
• B. Wheat > rice > soybean > maize
• C. Wheat > maize > rice > soybean
• D. Rice > maize > wheat > soybean

Hint:

Wheat and maize have historically shown far more herbicide resistant weed cases than rice and soybean.

Answer 1

The Correct Option is C

Step 1: Understanding the Question:
We need to rank four crops, rice, wheat, maize and soybean, by how many herbicide resistant weed cases have been reported in each, from the highest number of cases to the lowest.

Step 2: Key Formula or Approach:
When the same herbicide or the same mode of action is sprayed on a crop again and again, weed populations in that crop build up resistant biotypes over time. Records kept on herbicide resistant weeds, crop by crop, show that some crops carry far more documented resistance cases than others because of how intensively and how repeatedly herbicides have been used in them.

Step 3: Detailed Explanation:
Wheat has the largest number of reported herbicide resistant weed cases among field crops, mostly resistance to ALS inhibitor and ACCase inhibitor herbicides in grass weeds like Phalaris minor.
Maize comes next, since maize fields have seen long term, repeated use of triazine and other herbicide groups, building up a sizeable number of resistant weed biotypes.
Rice follows maize, with resistance cases, for example in Echinochloa species, growing as herbicide use intensified in rice growing systems, though the count stays below that of wheat and maize.
Soybean shows the fewest reported cases among these four crops in this ranking.

Step 4: Final Answer:
The correct order from most to fewest herbicide resistant cases is wheat, then maize, then rice, then soybean, so option 3 is correct.