. Productive soils; the fundamentals of successful soil management and profitable crop production. Soils. 256 HARMFUL AGENTS IN SOILS AFFECTING FERTILITY ^ spotted cucumber beetle. These worms are slender and yellowish- white with a dark-brown head. They not only feed on the corn roots, but in young corn they bore into the stems and eat the inte- rior, boring out the crown, and killing the bud. Burning over waste places and growing other crops on fields badly infested, thick plant- ing and enriching the soil are suggested remedies. Root Maggot.—Some truck crops, such as cabbage, radish and oni
. Productive soils; the fundamentals of successful soil management and profitable crop production. Soils. 256 HARMFUL AGENTS IN SOILS AFFECTING FERTILITY ^ spotted cucumber beetle. These worms are slender and yellowish- white with a dark-brown head. They not only feed on the corn roots, but in young corn they bore into the stems and eat the inte- rior, boring out the crown, and killing the bud. Burning over waste places and growing other crops on fields badly infested, thick plant- ing and enriching the soil are suggested remedies. Root Maggot.—Some truck crops, such as cabbage, radish and onions, are injured by the maggot (Fig. 161). Other crops are injured by eel worms or nematodes which cause the root-knot. Fig. 161.—Injurious work of maggot on radish. (Geneva Station, N. Y.) disease, as on cabbage and tomato (Fig. 162). The growing of other crops has been found the most effective remedy. The aphis (a'fis) is a common insect which injures crops. There are many species, many of which feed on the juices of plant roots.^ The corn root-aphis, or root-louse, is perhaps the best known. Ants are largely responsible for aphis injury to roots, since they carry the eggs of these insects into the soil and care for them in their nests. When the eggs hatch the ants tunnel into the ground and place the helpless aphids first on the roots of cer- tain weeds, such as smart weed, then on the corn roots (Fig. 163). Aphids are often called ''ant cows.^' Since the corn root-aphis 1 Cotton and asters are also commonly injured by the corn Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Weir, Wilbert Walter, 1882-. Philadelphia London, J. B. Lippincott company
Size: 1942px × 1287px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjectsoils, bookyear1920
