Control of the Leafhopper Erythroneura elegantula on Grape with DDT and Other Insecticides

1947 ◽  
Vol 40 (4) ◽  
pp. 487-495
Author(s):  
Norman W. Frazier ◽  
E. M. Stafford
Keyword(s):  
Erythroneura Elegantula

A method for continuous rearing of grapevine leafhoppers, Erythroneura spp. (Hemiptera: Cicadellidae)

2011 ◽  
Vol 143 (1) ◽  
pp. 102-104 ◽  
Author(s):  
J. Saguez ◽  
C. Vincent
Keyword(s):  
Second Step ◽  
Step Method ◽  
Egg Development ◽  
Petri Dishes ◽  
Erythroneura Elegantula

AbstractWe report a two-step method to rear three leafhopper species, Erythroneura elegantula Osborn, Erythroneura vitis (Harris), and Erythroneura ziczac Walsh, for experimental purposes on grapevines. The first step involves rearing adults on grapevines for reproduction, oviposition, and egg development. The second step involves rearing nymphs on isolated leaves placed in Petri dishes lined with agar. No mortality was observed and adults emerged in about three weeks. The three Erythroneura species were reared for 10 consecutive generations with minimal resources.

scholarly journals DEFINING ACTION LEVELS FOR LEAFHOPPERS ON THOMPSON SEEDLESS RAISIN VINEYARDS IN THE SAN JOAQUIN VALLEY OF CALIFORNIA

HortScience ◽  
1992 ◽  
Vol 27 (6) ◽  
pp. 605e-605
Author(s):  
William L. Peacock ◽  
Nick K. Dokoozlian ◽  
Billie J. Shaver
Keyword(s):  
Photosynthetic Activity ◽  
Treatment Decision ◽  
Economic Loss ◽  
San Joaquin Valley ◽  
Leaf Damage ◽  
Thompson Seedless ◽  
Correct Treatment ◽  
Monitoring Techniques ◽  
Erythroneura Elegantula ◽  
Action Levels

In the San Joaquin Valley of California, leafhoppers (Erythroneura elegantula and Erythroneura variabilis) can severely damage the foliage of grapevines resulting in economic loss. Most Thompson Seedless raisin vineyards, however, don't require treatment for leafhoppers every year. To help make the correct treatment decision, monitoring guidelines and action levels are important. This study provides information on monitoring techniques and action levels for this leafhopper complex. A sustained population of 20 nymphs per leaf during summer broods results in 20% to 30% visible damage to the canopy by harvest in early September. Populations higher than this may require chemical intervention to prevent an economic loss. The photosynthetic activity was reduced in proportion to visible leaf damage. Methods of estimating damage to the canopy from leafhopper activity are presented.

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