INFLUENCE OF ADULT NUTRITION ON THE BIOLOGICAL ASPECTS AND PREDATION EFFICIENCY OF THE BROWN LACEWING, Sympherobius fallax (NAVÁS) (NEUROPTERA: HEMEROBIIDAE)

Document Type : Original Article

Authors

Plant Prot. Dept., Fac. Agric., Zagazig Univ., Zagazig, Egypt

Abstract

The influences of four adult artificial diets on biological parameters and predation efficiency of brown lacewing, Sympherobius fallax (Navás), were assessed under laboratory conditions (27 ± 1 °C and 65 ± 5% RH). Obtained results showed that diet (1) led to the longest oviposition period (29.33 ± 0.99 days) and the highest number of deposited eggs (399.17 ± 9.42 eggs). The highest male longevity was recorded on diet (3). Diet (1) also resulted in the highest hatchability and fertility percentages. The incubation period was prolonged on diets (1) and (4), recording 6.90 ± 0.21 and 6.2 ± 0.23 days, respectively, compared to 5.8 ± 0.35 and 5.4 ± 0.24 days on diets (2) and (3). The durations of the 1st, 2nd, and 3rd larval instars were longer on diets (1), (3) and (4) than on diet (2). Total aphid consumption by larvae was significantly higher on diets (1), (3), and (4), with 159.10 ± 6.10, 149.50 ± 2.78, and 136.80 ± 3.98 aphids consumed, respectively, compared to 129.50 ± 5.66 aphids on diet (2). The 3rd larval  instar was the most efficient, accounting for 69% of total aphid consumption when adults were fed on diets (1), (3), and (4). Overall, rearing S. fallax adults on diet (1) significantly enhanced both biological performance and larval predation efficiency.

Keywords

Main Subjects

Zagazig Journal of Agricultural Research
Volume 52, Issue 3
May and June 2025
Pages 529-539

Files

Share

How to cite

Statistics