A: The topping of plants is for seed corn production. The tassels are removed so that plants can only be pollinated by other plants. The rows that are topped are females rows.Click to see full answer. Also know, should I cut the tassels off my corn?Up to 70% of tassels are removed mechanically. Then crews come through and clean the fields by hand removing any tassels that the machines missed. Timing is important because if you detassel too early yield may decrease. If you wait too long, the corn plant will start to pollinate itself.Secondly, when should you Detassel corn? Most detasselers work 3-4 weeks a summer, depending on the weather conditions any given year. The window of opportunity for removing the tassels is fairly small: you can’t begin until the tassels are forming, but then you must work quickly to remove them before they release their pollen. Hereof, why did farmers Detassel corn? Detasseling corn is removing the immature pollen-producing bodies, the tassel, from the tops of corn (maize) plants and placing them on the ground. It is a form of pollination control, employed to cross-breed, or hybridize, two varieties of corn.Do people still Detassel corn?The process of detasseling corn — removing the top of the plant — has become increasingly mechanized over the years, so there are fewer people working in the summer to detassel by hand.