Effects of Spacing Between Rows on Soybean Arthropod Populations
- 1 August 1978
- journal article
- research article
- Published by JSTOR in Journal of Applied Ecology
- Vol. 15 (2), 439-450
- https://doi.org/10.2307/2402603
Abstract
During summer 1976, population levels of various herbivores and all predators and parasitoids were monitored by 3 sampling methods (direct observation, sweepnet, vacuum net) on 3 different row-spacing plantings of ''Williams'' soybean with each planting treatment replicated 3 times. The potato leafhopper Empoasca fabae (Harris) was most abundant in conventional row-spacing (96 cm) plots. Other herbivores were favored in reduced row-spacing (high density) plots. All predators and parasitoids which showed significant differences among treatments reached highest population levels in the high density plantings. Reasons for the observed patterns are discussed. [Herbivores studied included: Sericothrips variabilis, Emposca spp. and Plathypena scabra. Predator/parisitoid species detected were: Syrphidae larva, Orius spp., Nabis, Chrysopa spp. and parasitic Hymenotera.].This publication has 6 references indexed in Scilit:
- SAMPLING METHODS FOR ARTHROPOD COLONIZATION STUDIES IN SOYBEANThe Canadian Entomologist, 1978
- Plant Plasticity, Phenology, and Herbivore Dispersion: Wild Parsnip and the Parsnip WebwormEcology, 1977
- Colonization of Crops by Arthropods: Non-equilibrium Communities in Soybean FieldsEnvironmental Entomology, 1976
- The effect of plant spacing on the numbers of aphids trapped over the groundnut cropAnnals of Applied Biology, 1968
- Interactions of crop density of field beans, abundance of Aphis fabae Scop., virus incidence and aphid control by chemicalsAnnals of Applied Biology, 1966
- The effect of planting date and spacing on the incidence of groundnut rosette disease and of the vector, Aphis craccivora Koch, at Mokwa, Northern NigeriaAnnals of Applied Biology, 1964