On the bionomics a little known sawfly Nematus (= Pteronidea) melanocephalus Htg. (Tenthredinidae, Hymenoptera) on willows

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F99%3A42400005" target="_blank" >RIV/62156489:43410/99:42400005 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

On the bionomics a little known sawfly Nematus (= Pteronidea) melanocephalus Htg. (Tenthredinidae, Hymenoptera) on willows

Popis výsledku v původním jazyce

The sawfly Nematus melanocephalus Htg. is a species little known to biologists and foresters, which occasionally shows local mass outbreaks on smooth-leaved species of genera Salix, Ulmus, Populus, Corylus and Betula. In I998 the sawfly (whose . occurrence in the Czech Republic was surprisingly evidenced only in Moravia) exhibited a sudden overpopulation on the willow S.fragilis L.in an old riparian and accompanying stand along the Svratka River in the Brno region.The sawtly has two generations in a year.Its protandric adults hatch in May and lay eggs under the lower epidermis of leaves.The average physiological natality amounts to 62.5 eggs,the average actual natality being 42.6 eggs.In captivity,the male adults live some 4.5(females only 3.5)days. The embryonal development lasts frolt 6 to 7 days. The fertilized eggs give rise to both males and females, the unfertilized eggs produce only males. The male larvae have four to five (females five) instars. The first instar larvae usually

Název v anglickém jazyce

On the bionomics a little known sawfly Nematus (= Pteronidea) melanocephalus Htg. (Tenthredinidae, Hymenoptera) on willows

Popis výsledku anglicky

The sawfly Nematus melanocephalus Htg. is a species little known to biologists and foresters, which occasionally shows local mass outbreaks on smooth-leaved species of genera Salix, Ulmus, Populus, Corylus and Betula. In I998 the sawfly (whose . occurrence in the Czech Republic was surprisingly evidenced only in Moravia) exhibited a sudden overpopulation on the willow S.fragilis L.in an old riparian and accompanying stand along the Svratka River in the Brno region.The sawtly has two generations in a year.Its protandric adults hatch in May and lay eggs under the lower epidermis of leaves.The average physiological natality amounts to 62.5 eggs,the average actual natality being 42.6 eggs.In captivity,the male adults live some 4.5(females only 3.5)days. The embryonal development lasts frolt 6 to 7 days. The fertilized eggs give rise to both males and females, the unfertilized eggs produce only males. The male larvae have four to five (females five) instars. The first instar larvae usually

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

GK - Lesnictví

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

1999

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

JOURNAL OF FOREST SCIENCE

ISSN

0024-1105

e-ISSN

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Svazek periodika

45

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

14

Strana od-do

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Kód UT WoS článku

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EID výsledku v databázi Scopus

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