“So He made them like eaten straw” (al-ʿaṣf al-maʾkūl). The interpretation of al-Kalbi: al-ʿaṣf is the leaves of crops, and al-maʾkūl is that which has been perforated by the worms that are found in vegetables.
﴿فجعلهم كعصف مَأْكُول﴾ تَفْسِيرُ الْكَلْبِيِّ: الْعَصْفُ: وَرَقُ الزَّرْعِ، وَالْمَأْكُولُ: الَّذِي قَدْ أَخْرَقَهُ الدُّودُ الَّذِي يَكُونُ فِي الْبَقْلِ.