A RED COLOR MORPH OF THE COLORADO POTATO BEETLE, LEPTINOTARSA DECEMLINEATA (SAY) (COLEOPTERA: CHRYSOMELIDAE)

1987 ◽  
Vol 119 (10) ◽  
pp. 957-958 ◽  
Author(s):  
Gilles Boiteau
Keyword(s):  
Colorado Potato Beetle ◽  
Leptinotarsa Decemlineata ◽  
Genetic System ◽  
Color Morph ◽  
Research Station ◽  
Potato Beetle ◽  
Frequent Monitoring ◽  
Royal Horticultural Society ◽  
Red Color ◽  
Leptinotarsa Decemlineata Say

The Colorado potato beetle, Leptinotarsa decemlineata (Say), has a genetic system of great diversity and dynamic nature. This results in an enormous adaptability to a range of habitat conditions. Its genetic diversity is exemplified by the existence of color mutants (Tower 1906; Boiteau 1980, 1985).In the summer of 1986, a red-body mutant male beetle was found in a potato field on the grounds of the Research Station in Fredericton, N.B., Canada. No other red beetles could be found in spite of frequent monitoring of beetle populations. The specimen retains the normal black maculation throughout but all pale yellow to flavous areas of normal beetles have been replaced by the color red (Scarlet 19/3 of the Royal Horticultural Society Colour Charts, 1942). To the best of my knowledge, this is the first report of a red Colorado potato beetle in Canada. Previously, red potato beetles had only been reported from the semi-desertic area of Toluca, near Mexico City (Tower 1906).

A WHITE COLOR MORPH OF THE COLORADO POTATO BEETLE, LEPTINOTARSA DECEMLINEATA (COLEOPTERA: CHRYSOMELIDAE)

1980 ◽  
Vol 112 (9) ◽  
pp. 975-975 ◽  
Author(s):  
Gilles Boiteau
Keyword(s):  
Colorado Potato Beetle ◽  
Leptinotarsa Decemlineata ◽  
First Record ◽  
The United States ◽  
Young Female ◽  
Color Morph ◽  
Research Station ◽  
Light Yellow ◽  
Potato Beetle ◽  
White Mutant

The Colorado potato beetle, Leptinotarsa decemlineata (Say), is distributed throughout the world and is an occasional pest of potatoes in Atlantic Canada. During the course of rearing Colorado potato beetles for behavioral studies at the Fredericton Research Station I obtained a strain of beetles which differs from the normal brown morph in being predominantly white. Similar coloring occurs in larvae and pupae and in young female and male adults. The eggs are light yellow instead of the usual orange-yellow. Such an albinic mutant has been previously reported in the United States by Tower (1906) and named L. pallida. Tower found the white mutant to be true-breeding and widely distributed, occurring both in nature and in laboratory colonies. Such a mutant has not been reported since and this is the first record of a white morph in Canada.

THE EFFECT OF WATER STRESS AND LEAFLET SIZE ON THE DENSITY OF TRICHOMES AND THE RESISTANCE TO COLORADO POTATO BEETLE LARVAE (LEPTINOTARSA DECEMLINEATA [SAY]) IN SOLANUM BERTHAULTII HAWKES

1990 ◽  
Vol 122 (6) ◽  
pp. 1141-1147 ◽  
Author(s):  
Yvan Pelletier
Keyword(s):  
Water Stress ◽  
Colorado Potato Beetle ◽  
Leptinotarsa Decemlineata ◽  
Solanum Berthaultii ◽  
Abaxial Surface ◽  
First Instar ◽  
Potato Beetle ◽  
Resistance To Insects ◽  
Leptinotarsa Decemlineata Say ◽  
Growing Conditions

AbstractSolanum berthaultii Hawkes bears trichomes reportedly providing resistance to insects. Results indicated that the density of types A and B trichomes was linearly related to the inverse of the leaflet area. The number of trichomes on the adaxial and on the abaxial surface of terminal leaflets was not affected by two levels of water stress or by growing conditions in the greenhouse or the field. The leaflets of the water-stressed plants were generally smaller and, consequently, the density of trichomes higher.The survival of first-instar Colorado potato beetle larvae was similar on S. berthaultii grown under varying drought conditions and on leaves from field-grown plants bearing different densities of trichomes.

scholarly journals Screening test for detection of Leptinotarsa decemlineata (Say) sensitivity to insecticides

2012 ◽  
Vol 27 (1) ◽  
pp. 59-67
Author(s):  
Dusanka Indjic ◽  
Slavica Vukovic ◽  
Snezana Tanaskovic ◽  
Mila Grahovac ◽  
Tatjana Keresi ◽  
...  
Keyword(s):  
Colorado Potato Beetle ◽  
Leptinotarsa Decemlineata ◽  
Screening Test ◽  
Rapid Assessment ◽  
Potato Beetle ◽  
Highly Sensitive ◽  
Leptinotarsa Decemlineata Say ◽  
Two Populations ◽  
Insight Into

In 2009, the sensitivity of 15 field populations of Colorado potato beetle (Leptinotarsa decemlineata Say.) - CPB was assessed to chlorpyrifos, cypermethrin, thiamethoxam and fipronil, four insecticides which are mostly used for its control in Serbia. Screening test that allows rapid assessment of sensitivity of overwintered adults to insecticides was performed. Insecticides were applied at label rates, and two, five and 10 fold higher rates by soaking method (5 sec). Mortality was assessed after 72h. From 15 monitored populations of CPB, two were sensitive to label rate of chlorpyrifos, one was slightly resistant, 11 were resistant and one population was highly resistant. Concerning cypermethrin, two populations were sensitive, two slightly resistant, five were resistant and six highly resistant. Highly sensitive to thiamethoxam label rate were 12 populations, while three were sensitive. In the case of fipronil applied at label rate, two populations were highly sensitive, six sensitive, one slightly resistant and six were resistant. The application of insecticides at higher rates (2, 5 and 10 fold), that is justified only in bioassays, provided a rapid insight into sensitivity of field populations of CPB to insecticides.

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