. Better fruit. Fruit-culture. 1915 BETTER FRUIT Page p Black Leaf "40" Spraying to Control Apple Aphis [From Bulletin No. 1, Published by The Kentucky Tobacco Product Company, I^ouisville, Ky.] PLANT lice are among the most an- noying and expensive pests of agri- cultural crops that the farmer must combat. And yet these small, soft- bodied insects are easily destroyed and elTectively controlled. A few general facts, a few simple directions, and the matter of aphis control loses most of its uncertain and perplexing features and becomes a regular routine part of orchard management. Th
. Better fruit. Fruit-culture. 1915 BETTER FRUIT Page p Black Leaf "40" Spraying to Control Apple Aphis [From Bulletin No. 1, Published by The Kentucky Tobacco Product Company, I^ouisville, Ky.] PLANT lice are among the most an- noying and expensive pests of agri- cultural crops that the farmer must combat. And yet these small, soft- bodied insects are easily destroyed and elTectively controlled. A few general facts, a few simple directions, and the matter of aphis control loses most of its uncertain and perplexing features and becomes a regular routine part of orchard management. Throughout the growing season these plant lice in enormous numbers drain the vitality of the plants attacked, and if not checked often cause large losses to the grower. A single aphis may bring forth from 50 to as many as 150 young which, in little more than a week, are themselves ready to produce young. At the approach of cold weather the females (the woolly aphis excepted) lay eggs, in which form the plant lice pass the winter. The woolly aphis passes the winter in form of young lice on twigs, branches and trunk, and as young and old lice on the roots. With the hatching of the eggs in the spring at the time the buds begin to grow, the activity of the plant lice begins, and unless steps are taken in time the number of individuals may become so large as to threaten the life of the plant or destroy a large portion of the season's crop. Plant lice are particularly destructive in the spring, though severe outbreaks may occur at any time during the growing season. The aphis generally prefers the younger, growing twigs and is found most frequently in the denser parts of the tree. Its sharp, slender beak pene- trates to the interior of the leaf, blos- som, fruit or twig and by this means it sucks the plant juices which constitute its food. As the aphis obtains its food from within the plant, evidently, poi- sons, which must be swallowetl to be effective, such as arsenate of lead, do no
Size: 1646px × 1518px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcollect, bookcollectionbiodiversity, booksubjectfruitculture
