Hymenopterous parasitoids of bark beetles [Scolytidae] in Israel: Host relation, host plant, abundance and seasonal history

Entomophaga ◽  
1986 ◽  
Vol 31 (2) ◽  
pp. 113-125 ◽  
Author(s):  
Z. Mendel
Keyword(s):  
Host Plant ◽  
Bark Beetles ◽  
Plant Abundance ◽  
Seasonal History

Host-Plant Specialization Mediates the Influence of Plant Abundance on Host Use by Flower Head-Feeding Insects

2015 ◽  
Vol 45 (1) ◽  
pp. 171-177 ◽  
Author(s):  
Paola A. F. Nobre ◽  
Leonardo L. Bergamini ◽  
Thomas M. Lewinsohn ◽  
Leonardo R. Jorge ◽  
Mário Almeida-Neto
Keyword(s):  
Host Plant ◽  
Flower Head ◽  
Host Use ◽  
Plant Abundance ◽  
Host Plant Specialization

scholarly journals Interspecific differences of stridulatory signals in three species of bark beetles from the genus Polygraphus Er. (Coleoptera: Curculionidae, Scolytinae) inhabiting the island of Sakhalin

2019 ◽  
Author(s):  
Ivan Andreevich Kerchev
Keyword(s):  
Host Plant ◽  
Plant Species ◽  
Bark Beetles ◽  
Acoustic Signals ◽  
Interval Number ◽  
Host Plant Species ◽  
Interspecific Differences ◽  
Species Specific ◽  
Conspecific Interactions

Stridulatory signals are involved in conspecific interactions between bark beetles (Coleoptera: Curculionidae, Scolytinae). In this study, we compared the qualitative profiles of acoustic signals in three species from the genus Polygraphus Er. Sympatry can be periodically observed in two of them – P. proximus and P. subopacus. Sporadically they occur on the same plants. P. nigrielytris colonize distinctly different host plant species; however, on the island of Sakhalin it inhabits the same biotopes. The purpose of the study is to identify species-specific parameters and the extent of differences in stridulatory signals of these species. Airborne signals produced during the contact of males of the same species were experimentally recorded. Among tested parameters of stridulatory signals, as the most species-specific were noted: chirp duration, interchirp interval, number of tooth-strikes per chirp, and intertooth-strike interval.

scholarly journals Some ecological factors influencing the breeding success of the Brenton Blue butterfly, Orachrysops niobe (Trimen) (Lepidoptera: Lycaenidae)

Koedoe ◽  
2002 ◽  
Vol 45 (2) ◽  
Author(s):  
D.A. Edge
Keyword(s):  
Host Plant ◽  
Breeding Season ◽  
Breeding Success ◽  
Ecological Factors ◽  
Future Research ◽  
Plant Abundance ◽  
Factors Influencing ◽  
Nectar Sources ◽  
Management Techniques ◽  
Blue Butterfly

The Brenton Blue butterfly, Orachrysops niobe (Trimen, 1862) (Lepidoptera:Lycaenidae), is endemic to the southern Cape and is currently listed as Endangered. This study looks at some of the key ecological factors influencing the breeding success of the species—host plant abundance and condition, nectar sources, climate/ microclimate, and vegetation management techniques. The adult butterfly population was monitored over an entire breeding season; host plants were identified and individually monitored; and egg counts were done. This enabled the effects of a number of different management techniques to be evaluated (burning, cutting, physical removal of invasive elements, and combinations thereof). A fivefold increase in the population of O. niobe was observed over the breeding season. This increase was positively correlated to a similar increase in host plant abundance in the areas where cutting and physical removal of invasive elements was practiced. Burning, by contrast, appeared to have a negative impact on host plant and butterfly abundance over the same period. Impacts of other factors such as climate, nectar sources and the natural strength of the second brood are discussed. A hypothesis, of megaherbivore activity as the principal historical disturbance mechanism promoting locally favourable conditions for O. niobe to establish and maintain colonies, is proposed. Recommendations for reserve management and future research are made.

The collapse of marsh fritillary ( Euphydryas aurinia ) populations associated with declining host plant abundance

2017 ◽  
Vol 211 ◽  
pp. 117-124 ◽  
Author(s):  
Ane Kirstine Brunbjerg ◽  
Toke Thomas Høye ◽  
Anne Eskildsen ◽  
Bettina Nygaard ◽  
Christian Frølund Damgaard ◽  
...  
Keyword(s):  
Host Plant ◽  
Plant Abundance ◽  
Euphydryas Aurinia ◽  
Marsh Fritillary

SEASONAL DEVELOPMENT AND HABITS OF PSEUDOPITYOPHTHORUS SPP. (COLEOPTERA: SCOLYTIDAE) IN SOUTHERN OHIO

1969 ◽  
Vol 101 (3) ◽  
pp. 306-313 ◽  
Author(s):  
Charles O. Rexrode
Keyword(s):  
Larval Stage ◽  
Bark Beetles ◽  
Adult Stage ◽  
Average Length ◽  
Pupal Stage ◽  
Seasonal Development ◽  
Two Generations ◽  
Spring Emergence ◽  
Seasonal History ◽  
Initial Entry

AbstractDuring 1965–67, the seasonal history and habits of two oak bark beetles, Pseudopityophthorus minutissimus (Zimm.) and P. pruinosus (Eichhoff), were studied in 47 oaks, Quercus spp., in southern Ohio.All study trees were attacked and the male beetles made initial entry into the trees. The attack period per tree was usually 1–3 days, and the density of attack varied from 5 to 120 galleries 1 ft2 of surface area. Oviposition began as soon as egg gallery construction began, and the incubation period was about 5 days in the summer. The rate of egg gallery construction was about 0.2 in./day in mid-summer. The average length of the egg galleries was 1.9 cm and the average number of eggs per gallery was 41.5. Over 50% of the parent adults of both species re-emerged after egg gallery construction and oviposition. The re-emerging parent adults can attack, lay eggs, and re-emerge three times. The larval stage can last 25–247 days, the pupal stage 15–139 days, and the adult stage 7–198 days. The beetles can overwinter in every stage but the pupal stage. Spring emergence occurred 29 April in 1966 and 14 April in 1967, and in southern Ohio, two generations and a partial one occur each year.Trap trees were attacked 7–205 days and brood emergence lasted 58–329 days. The beetles can attack one tree three times.

THE BIOLOGY OF CANADIAN BARK-BEETLES: THE SEASONAL HISTORY OF DENDROCTONUS RUFIPENNIS KY. IN NORTHERN ONTARIO

1931 ◽  
Vol 63 (6) ◽  
pp. 126-127
Author(s):  
E. B. Watson
Keyword(s):  
United States ◽  
Bark Beetles ◽  
The United States ◽  
Red Pine ◽  
White Pine ◽  
Northern Ontario ◽  
Dendroctonus Rufipennis ◽  
Forested Areas ◽  
History Of ◽  
Seasonal History

This bark-beetle is locally distributed over the forested areas of Quebec and Ontario, extending westward into Manitoba; in the United States, it has been recorded from Wisconsin and Michigan.The insect has been found breeding in fallen white pine and jack pine, and, within recent years, has also been recorded from red pine.

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