The
net reproductive rate (Ro) was 2,193.722 females per generation, the mean generation time (T) was 46.407 days, the daily intrinsic rate of increase (rm) was 0.166 and the daily finite rate of increase ([lambda]) was = 1.180.
The highest
net reproductive rate (R0) of 216 offspring per individual was noted at 24 +- 0.5 AdegC and the lowest (27.07 offspring per individual) at 32 +- 4 AdegC.
Under the experimental conditions,
net reproductive rate ([R.sub.0]), mean generation time (T), the intrinsic rate of increase (r), and finite rate of increase ([lambda]) of O.
frugiperda in silks and grains of YieldGard VT PRO[TM] and PowerCore[TM] reduced the
net reproductive rate (R) by 27 and 42%, respectively (Table 2).
The
net reproductive rate (Ro) ranged from 45.47 at 20[degrees]C to 18.25 at 30[degrees]C.
Chi [33] demonstrated that the relationship among the mean female fecundity (F) and the
net reproductive rate ([R.sub.0]) can be explained as
Three different schedules of the distribution of mortality within a year have different consequences for the annual contribution to
net reproductive rate ([R.sub.0]).
9a, b allow us to compute the speed of invasion as a function of the
net reproductive rate [R.sub.0] for each of these four density functions.
The
net reproductive rate ([R.sub.0]) indicated that the population ofS.
Population parameters (e.g., [R.sub.0],
net reproductive rate; [r.sub.m], intrinsic rate of increase; etc.) are important indices to measure the potential population growth of a species under controlled conditions, as well as evaluate the potential distribution of the pest in new areas (Southwood & Henderson 2000).
The
net reproductive rate was not found to be significantly different on various legumes (F=0.923; df=3.46; P=0.437).
The first (Roff 1984, 1986) maximizes
net reproductive rate, and predicts optimal age and size at maturity using a simple relationship between growth and mortality rates.