Illinois Field Crop Applicators Practice Test

What is the impact of insect feeding on corn silks during pollination?

1. Increases pollination efficacy

2. Reduces pollination success

3. Enhances nutrient uptake

4. Boosts plant growth

The correct answer is: Reduces pollination success

Insect feeding on corn silks during the critical period of pollination can significantly reduce pollination success. Corn is pollinated by wind, and the silks are essential for the process as they capture pollen grains that are released from the tassels. If insects feed on the silks, they can damage these vital structures, leading to fewer silks being available to intercept pollen. This damage can result in poor fertilization of the kernels, ultimately affecting grain yield and quality. There is a direct correlation between healthy silks and successful pollination; any hindrance to the silks, such as feeding from insects, compromises the entire pollination process. The other choices do not accurately reflect the consequences of insect feeding on corn silks. For instance, while nutrient uptake and plant growth are crucial for crop health, they do not enhance due to silk damage caused by insect feeding. Instead, the focus is squarely on how that damage impairs the plant's ability to successfully pollinate and produce a viable crop.