Journal article

Publication year: 1981

Pages: 138-149

Journal: Zeitschrift für angewandte Entomologie

Volume number: 91

Issue number: 2

ISSN: 0044-2240

Publisher: Parey

Abstract: 
Sodium silicate was sprayed on wheat plants in greenhouse and field trials in order to induce resistance to cereal aphids. Before being sprayed, the test plants were fertilized with different amounts of N. Sodium silicate solutions containing 0.05, 1, 2 and 4% were applied in the greenhouse and the last 3 concentrations in the field. At the time of heading the aphids Metopolophium dirhodum and Sitobion avenae were transferred on the flag leaves and earheads, respectively. The aphids kept in leaf and ear cages on the plants were counted in weekly intervals to ascertain population growth. At the end of the experiments the total weight of all aphids per cage was determined. The final, total effect was calculated, taking into account both population growth and biomass. Sodium silicate had a deteriorating effect on S. avenae as an average of all field experiments (60% after Abbott''s correction). It was less pronounced with M. dirhodum (30%). The best results were obtained on plants which were fertilized with the highest amounts of N. The effect of N favoring the growth of aphid populations was checked by the application of sodium silicate. The number of silica-containing hair cells in the epidermis of the treated plants increased by 70% compared to untreated ones. This indicated uptake and translocation of silica in the leaves of sprayed wheat plants. There was no negative influence of the sodium silicate treatment on the yield of wheat.

Harvard Citation style: HANISCH, H. (1981) THE EFFECT OF SODIUM-SILICATE ON THE POPULATION-GROWTH OF APHIDS ON WHEAT PLANTS WHICH HAD RECEIVED DIFFERENT AMOUNTS OF NITROGEN, ZEITSCHRIFT FUR ANGEWANDTE ENTOMOLOGIE-JOURNAL OF APPLIED ENTOMOLOGY, 91(2), pp. 138-149

APA Citation style: HANISCH, H. (1981). THE EFFECT OF SODIUM-SILICATE ON THE POPULATION-GROWTH OF APHIDS ON WHEAT PLANTS WHICH HAD RECEIVED DIFFERENT AMOUNTS OF NITROGEN. ZEITSCHRIFT FUR ANGEWANDTE ENTOMOLOGIE-JOURNAL OF APPLIED ENTOMOLOGY. 91(2), 138-149.