Which one of the following statements is NOT correct for high yielding varieties (HYV)?

Very less susceptible to diseases and are not easily attacked by insects

The correct answer is Option (3) → Very less susceptible to diseases and are not easily attacked by insects

The statement that is NOT correct regarding High Yielding Varieties (HYV) is: "Very less susceptible to diseases and are not easily attacked by insects."

In reality, HYV seeds are more susceptible to pests and diseases compared to traditional local varieties. Because they are often grown in monocultures and require high moisture and fertilizer levels, they create an environment where certain pests and fungi thrive. This is why the Green Revolution necessitated a heavy reliance on chemical pesticides and fungicides.

Analysis of the other statements:

• Maturing Time: HYV seeds are specifically engineered for a shorter life cycle. This allows farmers to practice multiple cropping (growing two or three crops on the same land in a single year).
• Plant Structure: These are often "semi-dwarf" varieties. Traditional tall plants would "lodge" (bend or break) under the weight of the heavy grain produced by high fertilizers. The shorter, thicker stalks make them more resilient to wind but result in less fodder (straw) for livestock.
• Weed Management: Because HYV crops are heavily fertilized, weeds also grow much faster and more aggressively. Therefore, frequent weeding and the use of weedicides are essential for a successful harvest.