Insects
Farmers and ranchers are among the hardest-working people this world has ever known. They put their collective nose to the grindstone and do what has to be done because no one else is going to do it for them. (Kinda sounds like the opening scene of a Dodge Ram commercial, doesn’t it?) Seriously though, I have the utmost respect for what they do. With that said, I also believe that too much time and money are spent solving issues on the farm that we created with our management practices. Insect pest issues are a prime example.
Corn rootworm predators (https://phys.org/news/2009-10-spying-corn-rootworm-predators-nightlife.html)
Insects in a balanced ecosystem will be more useful at taking out healthy tissue, plant or otherwise. Maggots have been used to consume infected human tissue, while leaving healthy tissue unscathed.
(https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1524-475X.2012.00850.x; https://www.science.org/content/article/how-maggots-heal-wounds;
https://www.telegraph.co.uk/global-health/science-and-disease/maggots-sent-war-zones-government-clean-wounds-save-limbs/)
Pest problems in agriculture are often the product of low biodiversity and simple community structure on numerous spatial scales (https://www.sciencedirect.com/science/article/abs/pii/S0006320712000821?via%3Dihub)