Citrus growers hope to fend off fruit-munching katydids, but one weapon is under scrutiny. Researchers found that children growing up near fields where the insecticide chlorpyrifos was deployed exhibited autism-like symptoms. A court ordered the Environmental Protection Agency to ban the insecticide’s use, but Trump’s EPA is fighting back. Science correspondent Miles O’Brien reports.

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• Amna Nawaz:

  Finally, the risk of potent pesticides long used in agriculture.

  Miles O’Brien looks at why they’re considered a key weapon in a farmer’s arsenal, despite real health concerns.

  It’s our weekly look at the Leading Edge of science.

• Miles O’Brien:

  It’s always harvest time in California’s Central Valley, the nation’s fruit basket, but little else is certain here.

  Just asked grower Bob Blakely.

• Bob Blakely:

  I mean, if you had a million dollars, you would be better off going to Las Vegas and gambling it then you would be going out here and becoming a citrus grower.