Results 21 to 30 of about 37,405 (281)

First Record of \u3ci\u3eAphis Helianthi\u3c/i\u3e (Homoptera: Aphididae) as a Pest of Celery [PDF]

open access: yes, 2017
In 1989, the aphid Aphis helianthi severely damaged five of 10 scouted celery fields in west central Michigan. In 1990 and in 1991, A. helianthi again was a problem. reaching pestiferous levels in three of 10 and two of 10 scouted fields.
Davis, M. G. Kortier, Grafius, E.
core   +2 more sources

The effect of choice and no-choice access on host (Aphis fabae) instars preference, in different ages and sizes of Lysiphlebus fabarum (Hymenoptera: Braconidae: Aphidiinae) [PDF]

open access: yesنامه انجمن حشره‌شناسی ایران, 2016
The influence of parasitoids on population dynamics is affected by host instar preference. The preference pattern of host instars is not fixed and is modified by the availability and relative abundance of host instars, intensity of defensive behaviors in
P. Najafpour, A. Rasekh, M. Esfandiyari
doaj  

Fungal Pathogens Infecting Soybean Aphid and Aphids on Other Crops Grown in Soybean Production Areas of Michigan [PDF]

open access: yes, 2018
Seasonal prevalence of fungal pathogens infecting soybean aphid, Aphis glycines Matsumura (Hemiptera: Aphididae), was assessed from 2004 to 2006 in two Michigan soybean production areas. In 2005 and 2006 field-collected soybean aphids were incubated, and
Brewer, Michael J, Noma, Takuji
core   +2 more sources

Feeding Records of Aphids (Hemiptera: Aphididae) From Wisconsin [PDF]

open access: yes, 2018
Basic to our understanding of any animal and its habitat requirements is knowing what it eats. Reported here are observations of feeding by 27 species of aphids encountered in Wisconsin over 1992 ...
Trager, James C   +2 more
core   +3 more sources

Temperature Effects on Development of Three Cereal Aphid Parasitoids (Hymenoptera: Aphidiidae) [PDF]

open access: yes, 2017
Temperature is an important climatological variable that influences the biology and ecology of insects. Poor climatic adaptation can limit the effectiveness of parasitic insects in biological control.
Burd, J. D   +3 more
core   +3 more sources

Russian wheat aphids (Diuraphis noxia) in China: Native range expansion or recent introduction? [PDF]

open access: yes, 2012
In this study, we explore the population genetics of the Russian wheat aphid (RWA) (Diuraphis noxia), one of the world’s most invasive agricultural pests, in north-western China.
Abbot   +85 more
core   +3 more sources

Effect of temperature on some biological parameters of an Iranian population of the Rose Aphid, Macrosiphum rosae (Hemiptera: Aphididae)

open access: yesEuropean Journal of Entomology, 2007
The rose aphid, Macrosiphum rosae, living on rose var. Black Magic, was reared in the laboratory at four constant temperatures 15, 18, 22 and 25 ± 1°C, 75 ± 5% R.H. and 14L : 10D.
Mohsen MEHRPARVAR, Bijan HATAMI
doaj   +1 more source

Residual Action of Slow Release Systemic Insecticides on \u3ci\u3eRhopalosiphum Padi\u3c/i\u3e (Homoptera: Aphididae) on Wheat [PDF]

open access: yes, 2017
Slow release formulations of acephate and carbofuran encapsulated in pearl corn­ starch or corn flour granules were applied to the soil at seeding time of potted \u27Caldwell\u27 wheat in the laboratory.
Araya, J. E   +3 more
core   +2 more sources

Aphididae of Persia [PDF]

open access: yesBulletin of Entomological Research, 1920
Head and thorax dark; abdomen pale, apparently pale green, with dark lateral spots. Antennae, cauda and cornicles dark. Legs with mid and hind femora dark, front pair paler; apices of tibiae and the tarsi dark. Antennae shorter than body, rather thick; basal segment larger and paler than second; third much longer than fourth and about as long as the ...
openaire   +1 more source

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