Agriculture - Obliquebanded leafroller (Choristoneura rosaceana) insect trap placed in a cherry orchard in Spring. Its function is an early-warning system to detect adult insect emergence and monitor pest populations so that timely control programs can be

agriculture agricultural country rural crop crops farm farms farming farmland field fields fertile foliage fruit fruits leaf leaves leaved orchard orchards grove groves row rows soil dirt earth ground land tree trees obliquebanded leafroller choristoneura rosaceana insect trap cherries spring early warning system insects emergence populations white canvas reflect reflects reflecting sun light sunlight color up color up immature traps green california ca