SOME BIOLOGICAL AND ECOLOGICAL CHARACTERS OF FALL ARMYWORM Spodoptera frugiperda (J.E. Smith) (Noctuidae : Lepidoptera) DAMAGE IN MAIZE IN NGHE AN
Authors: Nguyen Thi Thannh, Dang Thuy Trang
: Chuyên đề nông nghiệp và Tài nguyên trong xu thế chuyển đổi số : 80-87
Publishing year: 10/2022
The fall armyworm Spodoptera frugiperda (J.E. Smith) has become one of the most serious pests damaging on maize recently today. This research has been conducted to determine some biological and ecological characters of this pest under the lab conditions with temperature ranging from 27 to 32°C, humidity from 68 to 84%. The results showed that an average life cycle was 31.00 ± 0.75 days. At the temperature of 29.91oC and humidity of 69.36%, the number of eggs laid by an adult were 925.1 ± 48.07 eggs, hatching rate was 88.73 ± 1.63%. The fall armyworm damaged different parts of maize in the summer-autumn crop. They damaged from the stage of 2 - 3 leaves of maize and had two peaks of density. The plant density and varieties also affected the rate of damage with higher proportion for sweet maize and hybrid maize than that in DK6919S - genetically modified maize.
Biology, ecology, fall armyworm, Nghe An, Spodoptera frugiperda (J.E. Smith).
