With only one exception (i.e., third instar nymphs, fall 2006) the percent mortality caused by biotic factors
was 16%, 71% and 90 % during fall 2006, fall 2007 and spring 2008, respectively (Table 1).
We focused the discussion on aphids and had each student list all abiotic and biotic factors
that may influence the population size of aphids.
are living organisms--ranging from animals and other plants (weeds) to microorganisms--that affect the atmospheric environment.
The conclusion of this analysis is that purely mechanical arguments define a range of conditions, or a window, outside of which the ballooning activity cannot be physically sustained irrespective of the biotic factors
As many abiotic and biotic factors
predict population dynamics of whitefly in an agricultural ecosystem.
Insect pest are the key factor among all other biotic factors
that are responsible for low crop yield.The damage caused by insect pests may vary from 30 to 50% in major cash crops of the country.
The main purpose of this study was to investigate the biotic factors
responsible for the soil sickness due to CMAR.
Entomologists have realized that pathogens, particularly the mycopathogens, are influenced by a complex of variable abiotic and biotic factors
and by various management tactics that may be disruptive to natural controls.
McCoy, C. W., Samson, R. A., Boucias, D. G., Osborne, L. S., Pena, J. E., and Buss, L. J. 2009. Pathogens Infecting Insects and Mites of Citrus
Among the biotic factors
that might affect burrow structure would be the risk of predation.
In a series of papers, Dixon explored biotic factors
affecting aggregation in sycamore aphids (Dixon, 1966; Dixon & McKay, 1970; Dixon & Logan, 1972) but also noted occasions where exposure to weather was a main factor.
Contributing scientists review crop pathogens and the role of biotic factors
in disease development in a variety of crops and settings.
subpopulations are associated with distinct abiotic and biotic factors
, including known tularemia vectors and hosts.