Electronic Journal of Polish Agricultural Universities (EJPAU) founded by all Polish Agriculture Universities presents original papers and review articles relevant to all aspects of agricultural sciences. It is target for persons working both in science and industry,regulatory agencies or teaching in agricultural sector. Covered by IFIS Publishing (Food Science and Technology Abstracts), ELSEVIER Science - Food Science and Technology Program, CAS USA (Chemical Abstracts), CABI Publishing UK and ALPSP (Association of Learned and Professional Society Publisher - full membership). Presented in the Master List of Thomson ISI.
2000
Volume 3
Issue 2
Topic:
Horticulture
ELECTRONIC
JOURNAL OF
POLISH
AGRICULTURAL
UNIVERSITIES
JaÂkiewicz B. 2000. OBSERVATIONS OF THE POPULATION DYNAMICS OF APHIS SPIRAEPHAGA M█LL. (HOMOPTERA, APHIDIDAE) ON THE SHRUBS OF SPIRAEA VANHOUTTEI ZABEL., S. ARGUTA ZABEL., AND S. SALICIFOLIA L., EJPAU 3(2), #03.
Available Online: http://www.ejpau.media.pl/volume3/issue2/horticulture/abs-03.html

OBSERVATIONS OF THE POPULATION DYNAMICS OF APHIS SPIRAEPHAGA M█LL. (HOMOPTERA, APHIDIDAE) ON THE SHRUBS OF SPIRAEA VANHOUTTEI ZABEL., S. ARGUTA ZABEL., AND S. SALICIFOLIA L.

Bo┐enna JaÂkiewicz

 

ABSTRACT



The subject of studies conducted in the years 1994-1996 were observations on the occurrence of Aphis spiraephaga MŘll. on three spirea species: Spiraea vanhouttei Zabel., S. arguta Zabel. and S. salicifolia L. Aphids were most numerous on the examined shrubs in 1995, while their lowest numbers were observed in 1994. It was also found out that these aphids colonised the shrubs of S. vanhouttei in the highest degree, being rare on S. salicifolia. The effect of weather (heat, drought, showers of rain) on the number and dynamics of the aphid population concerning the place and period of feeding was greater on S. vanhouttei and S. arguta as compared with S. salicifolia. The damage caused by the feeding of that aphid was often reduced by the plant itself, because those shrubs grew intensively, after the aphids flew away. Newly appearing leaves were not deformed. Another factor which significantly lowered the ornamental value of the sh

Key words: Aphis spiraephaga, spireas: Spiraea vanhouttei Zabel., S. arguta Zabel. and S. salicifolia L..