Densities of four herbivorous insect species were compared on field beans (Phaseolus vulgaris) grown in monoculture and those grown in relay intercropping with winter wheat. In three years of study in New York State, population densities of Empoasca fabae (Harris) and Aphis fabae Scopoli were significantly less in plots intercropped with winter wheat than in those grown in monoculture. In contrast, intercropping was associated with greater densities of Lygus lineolaris (Palisot de Beauvois) and Systena frontalis (F.). An increased density of L. lineolaris may be an economic risk factor in beans intercropped with wheat because only this species of the four studied feeds exclusively on the flowers and developing seed pods.
All Science Journal Classification (ASJC) codes
- Agronomy and Crop Science
- Insect Science
Uwiano wa spishi nne za wadudu wa mimea ulilinganishwa kwenye maharagwe ya shamba (Phaseolus vulgaris) yaliyokuzwa katika monoculture na yale yaliyokuzwa katika relay intercropping na ngano ya majira ya baridi. Katika miaka mitatu ya utafiti katika Jimbo la New York, idadi ya watu wa Emporaschia fabae (Harris) na Aphis fabae Scopoli walikuwa chini sana katika mashamba yaliyopandwa na ngano ya majira ya baridi kuliko katika wale waliopandwa katika monoculture. Kinyume chake, kupandwa kwa mimea mingine kulihusishwa na idadi kubwa zaidi ya Lygus lineolaris (Palisot de Beauvois) na Systena frontalis (F.). Uwiano wa L. lineolaris unaweza kuwa sababu ya hatari ya kiuchumi katika maharagwe yaliyopandwa na ngano kwa sababu spishi hii tu ya nne zilizochunguzwa hula tu maua na kuendeleza mbegu. All Science Journal Classification (ASJC) codes - Agronomy na Crop Science - Sayansi ya Wadudu