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What causes yellowing leaves in polygonatum (Solomon's seal)
What causes yellowing leaves in polygonatum
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Key points for the control of the yellow cutworm
1. Morphological characteristics Adult: body length 14~19 mm, wingspan 32~34 mm. Body yellowish brown or grayish brown. Forewings grayish yellow, the transverse lines on the wing surface are not obvious, but the kidney-shaped mark, ring-shaped mark and rod-shaped mark are clear. The center and outer margin of the wing are dark brown. Hindwings white, with the anterior margin slightly yellowish brown. Egg: hemispherical, about 0.5 mm in diameter. The eggshell surface has 16~20 longitudinal ridge lines. Larva: mature larva body length 33~43 mm. Yellowish brown, glossy. The body surface is much wrinkled, with inconspicuous granules. Anal