Midseason Pest Status of the Cotton Aphid (Homoptera: Aphididae) in California CottonIs Nitrogen a Key Factor?
By J. Cisneros, L. Godfrey. 2001
109 citations recorded by the source corpus.
Abstract Field experiments were conducted from 1996 to 1998 to assess the effects of nitrogen fertilization rates and planting dates on the population dynamics of the cotton aphid, Aphis gossypii Glover, during the midgrowing season of California cotton. Cotton aphids reached higher densities in high nitrogen fertilized plants (227 kg N/ha, rate currently used by cotton growers) than in low nitrogen fertilized plants (57 kg N/ha). In addition, late-planted cotton (May–June), which had more nitrogen content, also harbored higher aphid populations than early plantings (April). Overall, aphid abundance was positively correlated with plant nitrogen content. In a moderate aphid pressure year (1996), planting the cotton early (April) was effective in keeping the aphid population below the midseason economic threshold. However, in a high aphid pressure year (1997), it was necessary to drastically reduce the nitrogen fertilization to 57 kg N/ha to maintain the aphid density under this threshold. Recent cultural practices in California cotton include higher rates of nitrogen fertilization, which increases nitrogen content of plants. The current data suggest that this practice (i.e., high fertilization) is an important factor contributing to the increased severity of the cotton aphid as a pest of California cotton during the midseason.
Subfields: Insect Science, Plant Science
View Paper: https://www.semanticscholar.org/paper/8124600115d5dbdfdeb3e627dc5e9a41f436e0cb
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Citations in the corpus
- Influence of Potassium Fertility on Soybean Aphid, Aphis glycines Matsumura (Hemiptera: Aphididae), Population Dynamics at a Field and Regional Scale (2006, result): “Similarly, there are a number of studies that have shown that changes in both N (van Emden and Bashford 1969,Pettit et al. 1994, Cisneros and Godfrey 2001, Nevo and Coll 2001, Awmack and Leather 2002) and K (van Emden 1966, Perrenoud 1990, Waring and Cobb 1992) insuence the population ecology of a”