The Potato Leafhopper and Its Control by J. E. Dudley, Jr., is an illustrated agricultural insect bulletin published by the United States Department of Agriculture in August 1921. Farmers’ Bulletin No. 1225 examines the insect, the foliage injury called hopperburn and the control work being reported at the time.
Recognizing a small crop insect
The opening pages place the potato leafhopper among the important enemies of potatoes and other crops. The author distinguishes direct feeding injury from the more extensive condition described as hopperburn.
Description of the insect follows, with attention to adults, eggs and nymphs. Enlarged drawings show successive stages and make the small insect’s form easier to study.
For readers building a gardening reference collection, the descriptive material offers a concrete connection between an insect’s life stages and evidence seen on plants. It is more informative than a list of crop symptoms alone.
Distribution and seasonal history
The bulletin discusses distribution and economic importance before turning to the seasonal cycle. It describes overwintered adults, movement onto crops, egg laying and the appearance of later generations.
Observations from Wisconsin play an important part in the account. The text distinguishes the timing of activity and generations under particular conditions rather than presenting every date as universal.
These chapters are useful for agricultural history because they show how the author connected field observations with an insect’s life cycle. They also explain why the condition of a crop can change during the growing season.
Feeding injury and hopperburn
The injury section treats feeding and hopperburn separately. Photographs show affected leaves, damaged fields and plants used in comparisons, helping the reader follow the discussion visually.
The text describes the progression of leaf symptoms and reports observations linking the presence of leafhoppers with injury. It also compares effects on different potato varieties.
The publication’s explanations belong to the research and terminology of its date. Readers should use the descriptions as historical evidence and consult current diagnostic information when identifying a present crop problem.
This distinction is especially relevant where several conditions can produce damaged or discolored foliage. A historical photograph is a useful reference, but does not by itself establish the cause of a new case.
Host plants and natural enemies
The food-plant discussion broadens the subject beyond potatoes. Beans, sugar beets and other plants appear in the account, with attention to movement between crops and differences in the severity of injury.
A natural-enemies section describes an insect parasite, a fungal disease and spiders. The author notes that the importance of a fungal outbreak varied markedly between seasons.
These passages are useful because they place the pest within a wider field setting. Nearby crops, weather and organisms attacking the insect all form part of the story.
Resistant vines and historical control work
A section on selection from resistant vines reports comparisons of planting stock taken from plants with different degrees of injury. This links the insect problem with observations about the crop itself.
The control chapters discuss prevention of hopperburn and the use of Bordeaux mixture. They include the timing and application practices investigated or recommended in the period.
The chemical recipes and control claims should be read as historical material, with current crop-protection guidance considered before practical use. Their reference value lies in documenting how the problem was studied and addressed in an early extension bulletin.
Audience and scan
This free ebook suits gardeners interested in insect life histories, researchers of potato husbandry and readers studying the development of agricultural pest research. The enlarged insect drawings, leaf photographs and field comparisons are its strongest visual features.
The PDF contains 16 digital pages, including the cover and preliminary material. It retains small type, photographs and the original printed pagination. Enlarge captions and drawings, and read the observations alongside the seasonal and regional context supplied in the text.
Book details
- Author: J. E. Dudley, Jr.
- Publisher: United States Department of Agriculture, Washington, D.C.
- Year: 1921
- Edition: Farmers’ Bulletin No. 1225; August 1921
- Digital length: 16 PDF pages
- Language: English
- File size: 0.86 MB
