Initial deposits, persistence and degradation kinetics of the insect growth regulator, diflubenzuron, in some terrestrial matrices following simulated aerial application

AbstractAirplane application of the insect growth regulator CGA 13353, a juvenile hormone mimic used experimentally against spruce budworm, Choristoneura fumiferana (Clem.), did not drastically reduce percentage parasitism in field samples of that host, but there was some evidence of susceptibility. Exploratory sampling of maple defoliators suggested that one species and its parasitoids suffered some mortality, but another species and its parasitoids did not. The treatment did not influence the viability of ant colonies.

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LABORATORY AND FIELD EVALUATION OF A FAST-ACTING INSECT GROWTH REGULATOR AGAINST THE SPRUCE BUDWORM, CHORISTONEURA FUMIFERANA (LEPIDOPTERA: TORTRICIDAE)

The Canadian Entomologist ◽

10.4039/ent114523-6 ◽

1982 ◽

Vol 114 (6) ◽

pp. 523-530 ◽

Cited By ~ 13

Author(s):

Arthur Retnakaran

Keyword(s):

Growth Regulator ◽

Choristoneura Fumiferana ◽

Spruce Budworm ◽

Field Evaluation ◽

Insect Growth Regulator ◽

Contact Toxicity ◽

Aerial Application ◽

Insect Growth ◽

Fast Acting ◽

Meridic Diet

AbstractUC-62644, a moult-inhibiting insect growth regulator (IGR) belonging to the benzoylphenylureas, had an EC50 of 0.1 to 0.2 ppm in a meridic diet for the 3rd to 6th larval instars of the spruce budworm, Choristoneura fumiferana Clemens. The effects of the IGR were apparent in less than 48 h after ingestion and there was evidence for some contact toxicity. The larvae were unable to discriminate between IGR-treated and untreated diet. Experimental aerial application of the IGR revealed that at <70 g in 4.7 1/ha (1 oz in 0.5 U.S. gal/acre) it effectively controlled spruce budworm populations and afforded foliage protection. These results were comparable with those obtained with Matacil® applied at the recommended rate.

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CONTROL OF THE OAK-LEAF SHREDDER, CROESIA SEMIPURPURANA (KEARFOTT) (LEPIDOPTERA: TORTRICIDAE), BY AERIAL APPLICATION OF DIFLUBENZURON

The Canadian Entomologist ◽

10.4039/ent117363-3 ◽

1985 ◽

Vol 117 (3) ◽

pp. 363-369 ◽

Cited By ~ 6

Author(s):

A. Retnakaran ◽

G.G. Grant

Keyword(s):

Growth Regulator ◽

Good Control ◽

Insect Growth Regulator ◽

Post Treatment ◽

Pheromone Traps ◽

Aerial Application ◽

Insect Growth ◽

Corroborative Evidence ◽

Treatment Population

AbstractUnlike some tortricids that are refractory to diflubenzuron, the oak-leaf shredder, Croesia semipurpurana (Kearfott), is susceptible to this molt-inhibiting insect growth regulator. Aerial application of 140 g in 4.7 L/ha provides good control of this insect and affords foliage protection. The success of diflubenzuron was evaluated by sampling larvae and pupae. Monitoring male moths with pheromone traps provided corroborative evidence of a significant decrease in the post-treatment population. The successful assessment by pheromone monitoring here merits its consideration for other control operations in forestry.

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