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attractive. The conditions of permanence are established by the method of comparison involving multiple Liapunov functions and …
Persistent link: https://www.econbiz.de/10010870299
Based on biological control strategy in pest management, we construct and investigate a pest-epidemic model with impulsive control, i.e., periodic spraying microbial pesticide and releasing infected pests at different fixed moments. By using Floquet theorem and comparison theorem, we prove that...
Persistent link: https://www.econbiz.de/10011050695
than some critical value, and a permanence condition is established via the method of comparison involving multiple …
Persistent link: https://www.econbiz.de/10005047425
In this paper, we investigate the extinction, permanence and dynamic complexity of the two-prey, one-predator system … with Ivlev's functional response and impulsive perturbation on the predator at fixed moments. Conditions for the extinction … and permanence of the system are established via the comparison theorem. Numerical simulations are carried out to explain …
Persistent link: https://www.econbiz.de/10005080947
boundedness, permanence, persistence, average persistence and extinction of the population is established. In particular, when … models degenerate into the almost periodic case, the equivalences of the permanence, persistence and average persistence of …
Persistent link: https://www.econbiz.de/10005080967
The effects of periodic forcing and impulsive perturbations on the predator–prey model with Beddington–DeAngelis functional response are investigated. We assume periodic variation in the intrinsic growth rate of the prey as well as periodic constant impulsive immigration of the predator. The...
Persistent link: https://www.econbiz.de/10005047391
Multiple sectors within U.S. crop industries - - -growers, elevators, handlers/shell- ers, processors, distributors, and consumers - - -are affected by aflatoxin contamination of commodities, and have the potential to control it using methods developed at both the pre- and postharvest levels....
Persistent link: https://www.econbiz.de/10009429567
We analysed to what extent the stochastic effects of two biological control agents (i.e. weevils and mycoherbicides) affect the optimal choice of Californian thistle control. A stochastic, dynamic optimisation model was set up to analyse strategies that maximise the expected net present values....
Persistent link: https://www.econbiz.de/10005503375
The purpose of research was analyzing educational needs of corn farmer's regarding biological control Bracon parasitoid of corn Caradrina in Dezful Township, Khouzestan province, Iran. The method of research was correlative descriptive. A random sample of Dezful township corn farmers of...
Persistent link: https://www.econbiz.de/10011142593
Abstract We develop an empirical framework for evaluating the profitability of the use of barn owls to control rodent populations by locating nesting boxes in agricultural areas. Barn owls’ behavior is incorporated into the analysis by estimated functions that relate agricultural production to...
Persistent link: https://www.econbiz.de/10010879042