The Potato-Tuber Moth: A Preliminary Account by F. H. Chittenden is a short illustrated report on an insect damaging potatoes both in the field and after harvest. The United States Department of Agriculture’s Bureau of Entomology issued it as Circular No. 162 in 1912.
A preliminary report on a spreading pest
The introduction places the insect in California and discusses its appearance in other places. Chittenden uses the scientific name current in the circular and notes its association with other crops, including tobacco.
The subtitle is significant. This is an early account assembled to answer an emerging practical problem, with some questions still unresolved. A footnote explicitly leaves uncertainty about the relationship between the moth on potatoes and the insect called splitworm on tobacco.
For readers studying agricultural research, that qualification is useful evidence of the limits the author placed on his own account.
Stages and visible injury
Drawings show the adult moth, larva and pupa, with size lines to help interpret the enlarged figures. A second illustration connects eggs and larvae with their position in and around a potato.
The text describes caterpillars entering leaves or the skin of a tuber and mining within the plant material. It also explains why the pest belongs to both field-crop and stored-product work.
These illustrations make the circular more useful than a simple list of remedies. They connect the insect’s form with the damage a grower would encounter during cultivation or handling.
Reports from California
A section on evidence of importance includes reports from J. E. Graf concerning an outbreak near El Monte in September 1912. The account links slow marketing and potatoes left in the ground with an opportunity for the insect to multiply.
The economic figures and reported losses belong to that particular episode. Their value is in showing how market conditions and harvest practice could interact with a biological problem.
The distribution discussion likewise records the information available at the time. It is a historical account of reports and concerns, rather than a present map of where the insect occurs.
Historical control discussion
The remedies section discusses clean cultivation, removal of infested material, volunteer potatoes and related weeds, rotation and cooperation among neighboring growers. Care in digging and the handling of harvested potatoes also receive attention.
A substantial part of the short text concerns fumigation. A photograph shows a fumigator used for stored products, and the explanation discusses the construction of a tight enclosure.
The chemicals described include carbon bisulphide and hydrocyanic-acid gas. These are hazardous historical practices, not methods to reproduce in a household or garden. Read this material as evidence of early stored-product pest work, with present control decisions based on current professional guidance.
Audience and scan
This free ebook suits agricultural historians, readers studying potato pests and researchers comparing early entomological extension literature. Its strongest features are the clear link between field and storage injury and the outbreak account showing why the problem attracted attention.
The PDF contains seven digital pages, including the cover and bureau information. The practical account occupies a short circular with small type, drawings and a photograph. The scan is pale in places; enlarge captions and technical names and read the preliminary qualifications with the surrounding text.
Book details
- Author: F. H. Chittenden
- Publisher: United States Department of Agriculture, Bureau of Entomology, Washington, D.C.
- Year: 1912
- Edition: Bureau of Entomology Circular No. 162; 1912; approved September 30, 1912
- Digital length: 7 PDF pages
- Language: English
- File size: 0.36 MB
