Biologie des Prozessiosspinners (Thaumetopoea Wilkinsoni Tams) in Jordanien

1967 ◽  
Vol 40 (10) ◽  
pp. 154-156
Author(s):  
I. K. Abu Yaman
Keyword(s):  
Thaumetopoea Wilkinsoni

Thaumetopoea wilkinsoni (Toxic Pine Caterpillars) Blepharoconjunctivitis

1987 ◽  
Vol 103 (1) ◽  
pp. 117-118 ◽  
Author(s):  
E. Bessler ◽  
B. Biedner ◽  
Y. Yassur
Keyword(s):  
Thaumetopoea Wilkinsoni

scholarly journals Efficacy of Beauveria bassiana and Beauveria pseudobassiana isolates against the pine processionary moth, Thaumetopoea wilkinsoni Tams, 1926 (Lepidoptera/Notodontidae)

2022 ◽  
Vol 32 (1) ◽  
Author(s):  
Elif Fatma Topkara ◽  
Oğuzhan Yanar ◽  
Celal Tuncer ◽  
Ismail Oguz Ozdemir ◽  
Elif Yildirim
Keyword(s):  
Biological Control ◽  
Beauveria Bassiana ◽  
Chemical Control ◽  
Fourth Instar ◽  
Control Methods ◽  
Skin Reactions ◽  
Pine Processionary Moth ◽  
Processionary Moth ◽  
Fungal Isolates ◽  
Thaumetopoea Wilkinsoni

Abstract Background The pine processionary moth, Thaumetopoea wilkinsoni Tams, 1926 (Lepidoptera/Notodontidae) is one of the most harmful insects that destroys pine ecosystems by feeding on pine leaves at its larval stage. Because of its urticating setae, the insect also causes severe skin reactions to animals and humans. Instead of chemical control, eco-friendly biological control methods are preferred to combat this species. Results The purpose of this study was to evaluate the efficacy of five different Beauveria bassiana Vuill, 1912 (Hypocreales/Cordycipitaceae) isolates (TR-SM-10, TR-SM-11, TR-SM-2, TR-SK-1 and TR-D-1) and one B. pseudobassiana Rehner & Humber (Hypocreales/Cordycipitaceae) isolate (TR-SM-1) against the fourth instar larvae of T. wilkinsoni under laboratory conditions. T. wilkinsoni larvae were collected from the Ondokuz Mayıs University Kurupelit Campus in Samsun, Turkey, in 2021, and the fourth instar larvae were used in the experiment. Two ml of spray of the six fungal isolates were applied to every ten larvae at each concentration (1 × 107 and 1 × 108 conidia ml−1). The experiment was carried out in five replicates per group, and the larvae were observed for 10 days. As a result, all isolates of B. bassiana caused 100% mortality at 1 × 108 conidia ml−1 concentration. B. pseudobassiana isolate also caused 100% mortality at both concentrations. At 1 × 107 conidia ml−1 concentration, the larvae treated with the B. pseudobassiana isolate (TR-SM-1) had the lowest LT50 (2.89 days) and LT90 values (4.79 days), while the larvae treated with TR-SM-10 isolate had the highest LT50 (5.65 days) and LT90 values (9.39 days). At 1 × 108 conidia ml−1 concentration, the larvae treated with TR-SK-1 isolate had the lowest LT50 (2.89 days) and LT90 values (4.79 days), while those treated with TR-SM-10 isolate had the highest LT50 (3.95 days) and LT90 values (8.15 days). Conclusion It has been recommended that the five different isolates of B. bassiana and B. pseudobassiana isolates were virulent to T. wilkinsoni larvae and can be used for biological control of T. wilkinsoni.

The Cyprus Processionary Caterpillar (Thaumetopoea wilkinsoni, Tams)

1926 ◽  
Vol 17 (2) ◽  
pp. 163-182 ◽  
Author(s):  
D. S. Wilkinson
Keyword(s):  
Pinus Halepensis ◽  
Larval Life ◽  
Small Tree ◽  
Larval Parasite ◽  
Single File ◽  
Great Economic Importance ◽  
Thaumetopoea Wilkinsoni ◽  
Hot Weather ◽  
The Masses ◽  
Larval Parasites

Thaumetopoea wilkinsoni, Tams, is known only in Cyprus, where it abounds, attacking all species of pine, but chiefly Pinus halepensis, Mill.In the plains the adults emerge from the end of August to the beginning of October. The eggs are laid, shortly after emergence, in cylindrical masses round pine needles, the masses averaging 150 eggs. Only one mass is laid by each female. The incubation period is about 45 days.The five larval instars are described, as well as the differences in the habits and nests in the various instars. The length of the larval life varies from 116 to 173 days. Only in the fourth do larvae remain in the same nest throughout the instar, as they frequently migrate, moving in single file to new feeding grounds, and there construct a new nest. Six such migrations have been observed for one colony during its three earlier instars.Pupation, which commences in the plains about the middle of March, takes place in the ground in silken cocoons at a depth of ¼ to 3 inches, the pupal life lasting all through the hot weather.Altitude considerably influences the life-history—the greater the altitude the earlier the emergence of the adult and the later the pupation of the fully-grown larvae, with consequent alterations in the length of the larval periods.Of the checks, two species of Chalcid egg-parasites have been shown to occasion a parasitism of over 17 per cent., and three species of Tachinid larval parasites sometimes to occasion a parasitism of at least 30 per cent. There is also an Ichneumonid larval parasite. This latter aestivates in the pupa of its host ; the Tachinids leave their larval hosts and pupate in the nest of the processionary.Re-afforestation in Cyprus, both natural and artificial, being an urgent necessity, this processionary is of great economic importance, as stands of young trees suffer very heavily from its attacks, one colony of larvae being sufficient to strip and, if the late rains fail, to kill a small tree. The writer considers, however, that control is possible by encouraging the parasites and predators, methods for which are outlined.

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