Dose/Response of Codling Moth (Lepidoptera: Tortricidae) Eggs and Nondiapausing and Diapausing Larvae to Fumigation with Methyl Bromide

Tebbets, Steven J.; Vail, P. V.; Hartsell, Preston L.; Nelson, Howard D.

doi:10.1093/jee/79.4.1039

Cited by 11 publications

(7 citation statements)

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“…Nondiapausing larvae were placed in tubes just before treatment. Because diapausing larvae are known to respond to fumigation treatments differently after being disturbed (Tebbets et al 1986), diapausing larvae were placed in tubes and held at 14ЊC and a photoperiod of 10:14 (L:D) h Ϸ2Ð3 wk before treatment. Tubes containing test larvae were weighed just before and immediately after treatment on an analytical balance (AB104-S, Mettler Toledo Inc., Columbus, OH) to determine moisture loss.…”

Section: Methodsmentioning

confidence: 99%

Effect of Relative Humidity and Product Moisture on Response of Diapausing and Nondiapausing Indianmeal Moth (Lepidoptera: Pyralidae) Larvae to Low Pressure Treatments

Johnson

2010

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Low pressure treatment in flexible polyvinyl chloride containers is a potential alternative to chemical fumigants for California tree nuts. Laboratory studies investigated the effect of relative humidity and product moisture on weight loss and mortality of diapausing and nondiapausing larvae of the Indianmeal moth, Plodia interpunctella (Hübner) (Lepidoptera: Pyralidae), exposed to 50 mmHg. Diapausing larvae were far more tolerant than nondiapausing larvae to low pressure; exposure times nearly twice those of nondiapausing larvae were required to obtain comparable weight loss or mortality levels in diapausing larvae. Relative humidity was found to have a large effect on both weight loss (assumed to be due to moisture loss) and mortality of both nondiapausing and diapausing larvae. Mortality and weight loss increased as humidity levels decreased. By controlling the relative humidity of the treatment chamber, product moisture also strongly affected weight loss and mortality. The results suggest that for tree nuts, product moisture levels may affect the efficacy of low pressure treatments.

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Section: Methodsmentioning

confidence: 99%

Effect of Relative Humidity and Product Moisture on Response of Diapausing and Nondiapausing Indianmeal Moth (Lepidoptera: Pyralidae) Larvae to Low Pressure Treatments

Johnson

2010

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“…Indianmeal moth and navel orangeworm were maintained on a wheat bran diet (Tebbets et al 1978); codling moth were reared on a lima bean-based agar diet (Tebbets et al 1986). Rearing conditions for navel orangeworm and nondiapausing Indianmeal moth were 28ЊC, 60% RH, and a photoperiod of 14:10 (L:D) h. Rearing conditions for nondiapausing codling moth were 27ЊC, 60% RH, and a photoperiod of 16:8 (L:D) h. Diapausing Indianmeal moth larvae were obtained by holding rearing jars recently infested with eggs under normal rearing conditions for 1 wk.…”

Section: Methodsmentioning

confidence: 99%

“…Both the 17 and 14ЊC chambers were kept at a photoperiod of 10:14 (L:D) h. Under these conditions, larvae from our Indianmeal moth isolate uniformly entered diapause and were recognized by their color, behavior, and increased size (Tsuji 1958). Diapausing codling moth larvae were reared at 18ЊC, 60% RH, and a photoperiod of 8:16 (L:D) h (Tebbets et al 1986). Codling moth still in the larval stage 50 d after being placed in diapause conditions were assumed to be in diapause.…”

Section: Methodsmentioning

confidence: 99%

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Response of Postharvest Tree Nut Lepidopteran Pests to Vacuum Treatments

Johnson¹,

Zettler²

2009

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“…Various methods have been demonstrated for eliminating cocooned codling moth larvae from fruit bins. One of the most effective methods is fumigation with methyl bromide (MofÞtt 1971, Tebbets et al 1986, Dentener et al 1998, but a variety of disadvantages, including phytotoxicity to fruit and environmental and human safety issues, have necessitated development of alternatives to this agent. Waiting to place bins in the orchard until just before harvest and the use of plastic bins also can reduce the level of infestation (Higbee et al 2001).…”

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confidence: 99%

Factors Affecting Entomopathogenic Nematodes (Steinernematidae) for Control of Overwintering Codling Moth (Lepidoptera: Tortricidae) in Fruit Bins

Lacey¹,

Neven²,

Headrick³

et al. 2005

Journal of Economic Entomology

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Fruit bins infested with diapausing codling moth larvae, Cydia pomonella (L.), are a potential source of reinfestation of orchards and may jeopardize the success of mating disruption programs and other control strategies. Entomopathogenic nematodes (EPNs) were tested as a potential means of control that could be applied at the time bins are submerged in dump tanks. Diapausing cocooned codling moth larvae in miniature fruit bins were highly susceptible to infective juveniles (IJs) of Steinernema carpocapsae (Weiser) and Steinernema feltiae (Filipjev) in a series of experiments. Cocooned larvae are significantly more susceptible to infection than are pupae. Experimental treatment of bins in suspensions of laboratory produced S. feltiae ranging from 10 to 100 IJs/ml of water with wetting agent (Silwet L77) resulted in 51-92% mortality. The use of adjuvants to increase penetration of hibernacula and retard desiccation of S. feltiae in fruit bins resulted in improved efficacy. The combination of a wetting agent (Silwet L77) and humectant (Stockosorb) with 10 S. feltiae IJs/ml in low and high humidity resulted in 92-95% mortality of cocooned codling moth larvae versus 46-57% mortality at the same IJ concentration without adjuvants. Immersion of infested bins in suspensions of commercially produced nematodes ranging from 10 to 50 IJs/ml water with wetting agent in an experimental packing line resulted in mortality in cocooned codling moth larvae of 45-87 and 56 - 85% for S. feltiae and S. carpocapsae, respectively. Our results indicate that EPNs provide an alternative nonchemical means of control that could be applied at the time bins are submerged in dump tanks at the packing house for flotation of fruit.

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Dose/Response of Codling Moth (Lepidoptera: Tortricidae) Eggs and Nondiapausing and Diapausing Larvae to Fumigation with Methyl Bromide

Cited by 11 publications

References 0 publications

Effect of Relative Humidity and Product Moisture on Response of Diapausing and Nondiapausing Indianmeal Moth (Lepidoptera: Pyralidae) Larvae to Low Pressure Treatments

Effect of Relative Humidity and Product Moisture on Response of Diapausing and Nondiapausing Indianmeal Moth (Lepidoptera: Pyralidae) Larvae to Low Pressure Treatments

Response of Postharvest Tree Nut Lepidopteran Pests to Vacuum Treatments

Factors Affecting Entomopathogenic Nematodes (Steinernematidae) for Control of Overwintering Codling Moth (Lepidoptera: Tortricidae) in Fruit Bins

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