Utilization of predatory stinkbug Eocanthecona furcellata (Wolff) against tomato fruitworm Helicoverpa armigera (Hubner) and eggplant fruit and shootborer (Leucinodes orbonalis Guenee)
2008
Aganon, T.M. | Romero, E.S., Central Luzon State Univ., Science City of Munoz, Nueva Ecija (Philippines)
A study on utilization of Eocanthecona furcellata (Wolff) as biological control agent against tomato fruitworm, Heliverpa armigera (Hubner) and eggplant fruit and shootborer, Leucinodes orbonalis (Guenee) was undertaken. The feeding capacity of different densities of E.furcellata (Wolff) was evaluated against third instar larvae of H. armigera and L. orbonalis under laboratory condition. The feeding capacity increases as the predator grew from first instar to adult stage. First nymphal instar of E. furcellata consumed one larva, while the adult consumed 10 larvae of L.orbonalis in a day. Similar trend was observed on the feeding capacity of E. furcellata against larvae of H. armigera. The predatory consumption of adults was higher than the nymphs. The first instar nymph preyed 2 larvae, while the adult preyed 12 larvae of H. armigera per day. Results on field release in cages of E. furcellata showed that higher density, significantly increased the yield of both tomato and eggplant. Field release in cages of 5 adult E. furcellata per tomato plant produced an average yield of 2.03 kg/plant as against field release in cages of 3 and 1 adult E. furcellata per plant with an average yield of 1.75 and 0.98 kg/plant, respectively. In eggplant, field release in cages of 5 adult E. furcellata per plant produced an average yield of 1.37 kg per plant. Feeding capacity of E. furcellata against tomato fruitworm and eggplant fruit and shootborer increased from early to late instar. The adult had higher feeding capacity than the nymph.
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