Answer:
His purpose is to convey a negative tone toward the tractors. They are similar to insects that destroy crops, and just like a plague of insects, the tractors are virtually unstoppable.
Explanation:
He think basically that tractors destroy things and are unstoppable just as insects do with plagues
T.S Eliot's "The Waste Land" and Geoffrey Chaucer's The Canterbury Tales differ in their interpretation as they describe April's showers. In "The Waste Land", T.S Eliot described it as "sweet", but in The Canterbury Tales of Geoffrey Chaucer, he described it as cruel. Hope this answer helps.
