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The fall webworm (Hyphantria cunea) is a moth in the family Erebidae known principally for its larval stage, which creates the characteristic webbed nests on the tree limbs of a wide variety of hardwoods in the late summer and fall. It is considered a pest but does not harm otherwise healthy trees.
Hyphantria is a genus of tiger moths in the family Erebidae. The genus was erected by Thaddeus William Harris in 1841. [1] The moths are primarily found in North and Central America. One species, Hyphantria cunea, was introduced in Eurasia.
Leaf scorch (also called leaf burn, leaf wilt, and sun scorch) is a browning of plant tissues, including leaf margins and tips, and yellowing or darkening of veins which may lead to eventual wilting and abscission of the leaf.
Chouioia cunea Yang, 1989 Chouioia is a genus of endo parasitic wasp of the family Eulophidae . Chouioia cunea is considered an important parasite of the fall webworm in China, where the moth is an invasive species.
Leaf spots can vary in size, shape, and color depending on the age and type of the cause or pathogen. Plants, shrubs and trees are weakened by the spots on the leaves as they reduce available foliar space for photosynthesis. Other forms of leaf spot diseases include leaf rust, downy mildew and blights. [4]
Fertilizer burn on a leaf. Fertilizer burns occur when the use of too much fertilizer, the wrong type of fertilizer, or too little water with a fertilizer causes damage to a plant. Although fertilizer is used to help a plant grow by providing nutrients, too much will result in excess salt, nitrogen, or ammonia which have adverse effects on a plant.
The World Cup has brought renewed attention to the "magic spray" used when soccer players get injured during games.
Kaolin spray is a pest control that has kaolin as the main ingredient. The practice has been in recorded use from 2000 B.C.E. in China [ citation needed ] . More recent studies have shown that kaolin sprays can promote photosynthesis and are effective in reducing insects and disease on plants.