亚洲最大福利网站_4hu四虎永久网址_麻豆国产原创_国产成人av一区二区

Honey bee colony collapse could mean food insecurity
date:Mar 18, 2022
S combined. The more concerning cost, lost pollination and the honey harvesting business, and the consequent decreased fruit crops, amount to losses in the billions annually. Beekeepers treat colonies against varroa mites every year when mite levels rise in the spring and fall but it is becoming much more difficult to manage the outbreaks.

There are only five widely used treatment options. One of these is showing signs of resistance, and two treatments are corrosive and difficult to apply. Effe

12/21 09:45