Decimate- related to Decimal; 1/10. DECI is division by 10. Centi is division by 100. Milli is division by 1000. However, there isn't much use of Centi-mate and Milli-mate. Thank you for sharing your views on dividing bugs into 1/10th.
99% reduction is a Deci-deci-mate. 7/10ths of bugs disappearing is a significant decimal fraction, thus the question: how it is not a "deci-", mate?
RE: Global Ecosystem Rapidly Collapsing… Insect Biomass Plummets 75% in One Generation… Scientists Warn of “decimation”… Humanity may not Survive much longer