God does control and uses insects such as the locust for various reasons. In Moses’ day, one of the great plagues against the Pharaoh was with locusts:
So Moses and Aaron went to Pharaoh and said to him, “This is what the LORD, the God of the Hebrews, says: ‘How long will you refuse to humble yourself before me? Let my people go, so that they may worship me. If you refuse to let them go, I will bring locusts into your country tomorrow. They will cover the face of the ground so that it cannot be seen. They will devour what little you have left after the hail, including every tree that is growing in your fields.
They will fill your houses and those of all your officials and all the Egyptians–something neither your fathers nor your forefathers have ever seen from the day they settled in this land till now.'” Then Moses turned and left Pharaoh. (Exo 10:3-6)
Locusts have been a dread to farmers and others who have crops, fruit trees, etc. The Bible says, He [God] gave their crops to the grasshopper, their produce to the locust. (Psa 78:46) God sometimes uses them as a judgment, as in Exodus and in the days of Joel:
What the locust swarm has left the great locusts have eaten; what the great locusts have left the young locusts have eaten; what the young locusts have left other locusts have eaten. Wake up, you drunkards, and weep! Wail, all you drinkers of wine; wail because of the new wine, for it has been snatched from your lips. (Joel 1:4,5)
Just living in our cursed age brings many sorrows and sighs, even for the righteous. For those of us living in the NE part of the USA, the 17 year cicadas (locust-like insects) may soon be coming out of the ground and with them their devastating effects on certain types of vegetation. 
If you are of that number, when the millions of cicadas come out of the ground, remember it was even worse for Pharaoh in the days of Moses!
[BTW, one day there will be no more sorrow and sighing for the redeemed (Isa. 35:10), but plenty of weeping and gnashing of teeth for the wicked dead (Mt. 13:41,42)! Do you know Jesus?]
