Flight of San Jose scale, Quadraspidiotus perniciosus males and time of crawler appearance in orchards of northern Greece

Kyparissoudas, D.S.

doi:10.12681/eh.13951

Cited by 2 publications

(2 citation statements)

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“…The first crawlers emerged 29-31 days (approxi mately 196 DDs) after the first male captures (Table 1), as reported by Kozar (1977), Rice et at. (1982), and Kyparissoudas (1987). Peak crawler emergence occurred in the second week (Fig.…”

Section: Resultsmentioning

confidence: 90%

“…In Northern Greece, the time of male flight and crawlers emergence has been determined by pheromone trapping and sticky-tape traps, respectively 1 Received for publication February 19, 1991). (Kyparissoudas 1987). If a fixed relationship could be demonstrated between the first adult male catch on pheromone baited traps and the time of crawler appearance, this technique could be used to determine the proper timing of chemical applications against the immature stages of SJS.…”

Section: Introductionmentioning

confidence: 99%

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Determination of spray dates for the control of the first generation of Quadraspidiotus perniciosus in Northern Greece

Kyparissoudas¹

2017

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During 1986During -1988 the relationship between catches of San José scale (SJS). Quadraspidiotus perniciosus (Comstock). adult males in pheromone traps and crawlers on sticky-tape traps was studied as a basis of SJS crawler control in apple orchards of Northern Greece. Spring male flight began in mid-to late April and crawler emergence occurred in mid-to late May. Crawlers were active for a period of 6-7 weeks until early July. Peak crawler emergence occurred approximately 12 days after the first emergence, or 42 days after the first males were captured on pheromone traps. Because in our 3-year study the crawler emergence occurred 29-31 days or 191-202 day-degrees (base I0.5°C) after the capture of the first male, we conclude that a consistent lime-relationship exists between the two events. Two insecticide treatments, one three days after the first crawler appearance and another 10 days later (near peak crawler activity), provided the best control against the first generation of scale.

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Section: Resultsmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%