Hot Water Immersion for Surface Disinfestation of Maconellicoccus hirsutus (Homoptera: Pseudococcidae)

Mealybug Maconellicoccus hirsutus (Green) adults, nymphs, crawlers, and eggs were tested for their susceptibility to hot water immersion at 47, 48, and 49°C. Eggs inside ovisacs were found most tolerant with prolonged survival compared with other stages at all temperatures. Ovisacs required an avera...

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Bibliographic Details
Published in:Journal of economic entomology 2005-04, Vol.98 (2), p.284-288
Main Authors: Hara, Arnold H., Jacobsen, Christopher M.
Format: Article
Language:English
Subjects:
Animals
Biological and medical sciences
COMMODITY TREATMENT AND QUARANTINE ENTOMOLOGY
Control
developmental stages
disinfestation
Female
Fundamental and applied biological sciences. Psychology
Generalities
heat tolerance
Hemiptera - physiology
Hot Temperature
hot water immersion
hot water treatment
Immersion
insect control
Insect Control - methods
kinetic models
lethal time
Maconellicoccus hirsutus
Male
mathematical models
mealybug
mortality
Nymph - physiology
Ovum - physiology
Phytopathology. Animal pests. Plant and forest protection
prediction
Protozoa. Invertebrates
quarantine
Water
water temperature
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Summary:Mealybug Maconellicoccus hirsutus (Green) adults, nymphs, crawlers, and eggs were tested for their susceptibility to hot water immersion at 47, 48, and 49°C. Eggs inside ovisacs were found most tolerant with prolonged survival compared with other stages at all temperatures. Ovisacs required an average of 1.38, 1.46, and 1.62 times longer treatment duration than adults, nymphs, and crawlers, respectively, for 99.9% predicted mortality at 47, 48, and 49°C. Lethal time estimations were calculated from inverse predictions of regressions derived from logit-transformed data as well as those created using a kinetic model. LT 99.9 estimations were 47.0, 21.2, and 11.9 min at 47, 48, and 49°C, respectively, by using regressions with logit transformations. The kinetic model predictions were 43.9, 19.6, and 11.1 min at 47, 48, and 49°C, respectively. During the study no emergence from eggs inside ovisacs was found after treatments of 52, 24, and 14 min at 47, 48, and 49°C, respectively. Results from this study provide efficacious temperature–time treatments.
ISSN:0022-0493
1938-291X
0022-0493
DOI:10.1603/0022-0493-98.2.284