MODELLING POPULATIONS OF THE STALK-BORER Eldana saccharina, BASED ON THE CONDITIONS OF SUGAR CANE AS A HOST PLANT
نویسندگان
چکیده
Eldana saccharina Walker (Lepidoptera: Pyralidae) has caused high yield losses in KwaZulu-Natal sugarcane. Early cutting is one of a number of methods being used to reduce losses due to E. saccharina infestations. A cohort based age-structured mathematical model was developed to enable sugarcane growers to simulate the effect of various seasonal conditions on E. saccharina infestation levels. The model takes into account the contribution of the condition of sugarcane (determined from the CANGRO model) to population dynamics of E. saccharina and calculates a crop damage index on each day of the simulation. Temperature dependence of the duration of each stage in the E. saccharina life cycle is an added parameter of the model. By running CANEGRO and E. saccharina models together, insight is gained on cutting cycle length determinations.
منابع مشابه
Resistance Mechanisms of South African Sugarcane to the Stalk Borer Eldana Saccharina (lepidoptera: Pyralidae): a Review
Despite plant resistance constituting one of the major defences of South African sugarcane against the stalk borer, Eldana saccharina Walker (Lepidoptera: Pyralidae) (Leslie and Keeping, 1996; Keeping, 1999; Keeping and Govender, 2002), little has been published regarding the mechanisms upon which this resistance is based. This paper reviews published and unpublished information on this subject...
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