First experiences with occurrence and control of green grape capsid (Lygocoris spinolae Meyer-Duer)
2001
Beber, K. | Matis, G. (Kmetijsko gozdarski zavod, Maribor (Slovenia)) | Vrabl, S. (Maribor Univ. (Slovenia). Agriculture Fac.)
In the vineyards of the 'Podravje' wine-growing region substantial damages on grapevine were observed in recent years, which seemed to be made by grape capsids. By frequent and thorough examination of the damaged vines, we captured a few specimens, which were classified as Lygocoris spinolae (Meyer-Duer), from the Miridae family. The species is related to the bugs Lygocoris pabulinus and Campyloma verbasci, which according to the authors David V. Alford, Henk Stigter and Karin Hengstberger cause damages to fruit trees. It is an indigenous species, first detected in our neighbouring wine growing region (Graz) and named as "Schilcherwanze" by Fulmek (1931). It was also found in Switzerland (Caccia et al., 1980), In Germany (Stellwagg, 1928) and in Italy (Grandi, 1951). The development cycle is similar to all the bugs from Miridae family, which consists of eggs, 5 stages of nymphs, and adults. This capsid overwinters as eggs in the pith of pruning wounds of vine canes. The eggs hatch during vine budding and the nymphs puncture the foliage and cause characteristic distortions similar to damages due to hail. The shoot stunt appears (internodes shorten) and the damages occur also on the developed grapes in the form of berry dropping. The paper presents morphological characteristics of damages, the description of the pest, monitoring system and chemical control.
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