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Cold weather can cause citrus leaves to curl and so can water stress. Aphids are another cause.
aphids
aphids
An ash-leaf is a leaf of an ash tree.
Feeding, for instance aphids; leaf hoppers and rollers, and psyllids. Fungus, for instance nectarines and peaches. Spraying, for instance 2, 4 D drift; or Banvel or Roundup control reactions. Overwatering, for instance tomatoes. Viral, for instance mosaic virus; or squash or tomato yellow leaf curl virus.
stunted plants leaf curl up as a cup shape hard leaf midrib yellow leaves
New leaf growth is caused by the cold soil causing the leaf to curl and fall off producing a new leaf. The cause of the leaf to curl can be from an aphid species or different plant diseases.
most likely aphids though there may be many reasons
An ash-gray leaf bug is an insect in the family Piesmatidae.
the best leaf to find aphids on are the hickberry leaves they are heart shaped leaves
most likely aphids, though there may be many reasons
Sunlight causes this.