某些铃形和无蜜腺减少病菌容易进入棉铃的途径。
Certain boll shapes and absence of nectarines reduces easy avenues of penetration into the boll .
因小区条件限制了无蜜腺抗性的表达，无蜜腺小区未表现出明显差异。
Possibly owing to the narrow condition of plot , the cotton lines without ( outside flower ) nectary glands did not show resistance .
无蜜腺