Phytoparasitica (1998) 26 (2) - Possibilities for reducing the ...

M. Kehat, L. Anshelevich, Devora Gordon, Miriam Harel, L. Zilberg and E. Dunkelblum (1998)
Possibilities for reducing the cost of pheromone application for mating disruption of the pink bollworm (Pectinophora gossypiella)
Phytoparasitica 26 (2)
12th Conference of the Entomological Society of Israel, Innovations in Pheromone Research and Application in Israel, March 3, 1998, Bet Dagan, Israel
Abstract: The cost of pheromone application is of great importance in determining the extent of its practical usage. Two possibilities for lowering the cost were tested: reducing the density of the dispensers (= reduced pheromone dosage); and combining the pheromone of the pink bollworm, Pectinophora gossypiella, with the Helicoverpa (Heliothis) armigera or Earias insulana pheromones in the same dispenser. The effect of density of a Shin-Etsu twist-tie rope formulation (PBW rope L®) on percent mating of pink bollworm females was evaluated by the mating table technique, comparing the percentage of mating of virgin sentinel females in pheromone-treated and control plots. The P. gossypiella pheromone formulation, PBW rope L®, applied at distances of 9 x 9 m (123.4 ropes per ha, releasing 132.0 mg/day/ha), 11 x 11 m (82.6 ropes per ha, releasing 88.4 mg/day/ha) and 14 x 14 m (51.0 ropes per ha, releasing 54.6 mg/day/ha), resulted in very high suppression of mating and complete shut-down of pheromone traps. These release rates were much lower than those now in use in Israel (6 x 7 m, 23.8 ropes per ha, releasing 261.8 mg/day/ha) or elsewhere. At distances of 20 x 20 m (25.0 ropes per ha, releasing 26.7 mg/day/ha), mating disruption was less effective (only 65% disruption). These results indicate that mating of P. gossypiella can be disrupted with a much lower dosage of pheromone than that presently in use. Tests with Shin-Etsu ropes combining P. gossypiella and H. armigera pheromones (HPROPE) or P. gossypiella and E. insulana indicated that pheromones of different species can be combined in the same dispensers with success.
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Research topic(s) for pests/diseases/weeds:
pheromones/attractants/traps

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Helicoverpa armigera
	Pectinophora gossypiella
	Earias insulana