Plant Protection Science (2005) 41, 21-26

J. Štolcová (2005)
Insect injury and mortality of seedlings of field penny-cress (Thlaspi arvense L.)
Plant Protection Science 41 (1), 21-26
Abstract: During 1997-1999 the injury caused by insect herbivors and mortality of plants of field penny-cress (Thlaspi arvense L.) was studied on an early fallow field at Prague-Ruzyne. The highest abundance of the weed (102 plants per m²) was recorded in 1999, the lowest (27 plants/m²) in 1998. Nearly all plants (100% in 1997 and 1998, 94% in 1999) were injured by flea beetles (Phyllotreta spp.). Injury was greatest (> 50%) in younger seedlings. Mortality was low in 1997 (17.1%) and 1999 (15.8%), but high in 1998 (94%) because of concurrent drought. Herbivory and drought may kill a large proportion of seedlings and thus change the composition of the weed community.
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Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
surveys/distribution/isolation

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Thlaspi arvense (weed)		Czech Republic