Beginning of the End

Beginning of the End was a 1957 science fiction film starring Peter Graves. Nuclear radiation gives us giant vegetables, but then they are eaten by locusts, so they grow to enormous size, too. But the radiated grain and vegetables aren't enough, so the locusts start eating people. How can we defeat them? Maybe a nuclear bomb- or maybe something less destructive. Beginning of the End was made on a generous budget for its time and genre of $170,000, and it made some money. But the implausible plot and the laughable special effects relegated it as forgettable at the time. Today, it is somewhat of a cult classic for those exact reasons. (Thanks, WTM!)