DALBULUS MAIDIS PDF

Abstract. A 3-yr study was conducted in California’s southern San Joaquin Valley to determine the overwintering survival of the corn leafhopper, Dalbulus maidis. The corn leafhopper, Dalbulus maidis (Delong and Wolcott) is found only in subtropical and tropical areas of America. Its host range is limited to maize and its . The corn leafhopper, Dalbulus maidis (DeLong & Wolcott) (Hemiptera: Cicadellidae), is one of the most important pests of corn, Zea mays L. (Poaceae), in Latin.

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The head region is formed by a small acrosome and the nucleus. Apparently, damage was due solely to leafhopper feeding, because no evidence of corn stunt disease was reported. The presence of S.

The question of D. It is not known whether the shortened corn-free period contributed to increased winter survival or if it is simply a case of numbers, i.

maize leafhopper (Dalbulus maidis)

Positives were at least 2. Incorn leafhopper populations reached extremely high levels on late-maturing field corn silage and grain and sweet corn in Fresno, Tulare, and Kings counties C. There was a general trend for an increased percentage of males surviving the winter over the 3 yr.

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From the s to the s, serious outbreaks of D. Collar for assistance in conducting various aspects of the field studies. Corn and teosinte, Zea spp.

Honeydew and sooty mould accumulates on heavily infested plants. Add to this the presence of volunteers for an additional dalbilus, and corn becomes almost a year-round crop. The absence of food is rarely a cue for diapause induction Denlinger In California, before the outbreak, leafhoppers appeared only late in the season August and Septemberthus giving credence to the theory that they migrated northward from Mexico, arriving late dalblus the growing season.

C Casela, R Renfro, A. Annual movement of Dalbulus maidis into the southern United States and its role as vector of the corn stunt virus.

During the winter of andvolunteer plants were examined during January, February, and March for the presence of surviving leafhoppers. Corn leafhopper reappeared inand corn stunt was apparently present in at least some fields Kloepper et al.

Oxford University Press is a department of the University of Oxford. The sites denoted as Dover, Dairy, 18th East, and Eighth Maidjs County all represent locations adjacent to corn fields, whereas the River site was a riparian area in Kings County, consisting mainly of grassy weeds located along the Kings River.

Florida Entomologist

In other areas of the United States, investigators have speculated that infestations came from elsewhere as well.

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In the early season, the PCR product of the reaction was used in a second reaction, and distinct bands were observed. These leafhoppers came from several locations throughout Kings, Tulare, and Fresno counties Table 2.

Based on five separate observations, 20 and 16 adult leafhoppers were found in and dalblus, respectively.

Spiroplasma kunkelii new-species characterization of the etiological agent of corn stunt disease. The amounts of reagents used in the preparation were determined by the number of leafhoppers in the sample. Experimental analysis of flight activity of three Dalbulus leafhoppers Homoptera: The warmer conditions may have contributed to an increase in the number dalbulks infected sentinel plants.

During the s, there was a substantial migration of the dairy industry from southern California to the southern SJV, especially Tulare and Kings counties. Immigration from Mexico seemed to be an unlikely because the distance from D. Overwintering biology of Dalbulus leafhoppers Homoptera: Corn leafhopper overwintering biology was never dalbulhs. Percentage of overwintering a male and female D. Sentinel plants, placed in the field to detect the presence of S.

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