Testing the consistency of spatio-temporal patterns of flight activity in the stored grain beetles Tribolium castaneum (Herbst) and Rhyzopertha dominica (F.)

2017 ◽  
Vol 72 ◽  
pp. 68-74 ◽  
Author(s):  
Gregory J. Daglish ◽  
Andrew W. Ridley ◽  
Robin Reid ◽  
Gimme H. Walter
Keyword(s):  
Tribolium Castaneum ◽  
Temporal Patterns ◽  
Flight Activity ◽  
Rhyzopertha Dominica ◽  
Stored Grain ◽  
Grain Beetles ◽  
Spatio Temporal

The frequency of Cryptolestes spp. in grain in south-east Queensland

1980 ◽  
Vol 20 (103) ◽  
pp. 234 ◽  
Author(s):  
ER Sinclair ◽  
M Bengston
Keyword(s):  
Sitophilus Oryzae ◽  
Common Species ◽  
Red Flour Beetle ◽  
Rhyzopertha Dominica ◽  
Stored Grain ◽  
Grain Beetles ◽  
Farm Survey ◽  
Stored Grain Pests ◽  
Grain Protectant ◽  
Grain Farms

In a survey of 60 grain farms on the Darling Downs, Queensland, during 1977-78, the flat grain beetles Cryptolestes spp., which are germ feeders in stored grains, were found on 39 of the farms and in 15% of the 483 samples taken. Ninety percent of infestations involving Cryptolestes spp. were found in bag or bulk stores of seed and feed grain, where they were usually associated with heavy infestations of the three more common stored grain pests, the rice weevil Sitophilus oryzae (L.), the lesser grain borer Rhyzopertha dominica (F.), and the red flour beetle Tribolium castaneum (Herbest.). Three species of Cryptolestes were detected: C. pusillus (Schonherr) (45.6% of farms surveyed), C. ferrugineus (Steph.) (28.1 %), and C. pusilloides (Steel and Howe) (15.8%). During the farm survey, samples were also collected from 8 of the 11 central storages reported infested with Cryptolestes spp. C. ferrugineus was present in each of these samples, C. pusillus in only one, whilst C. pusilloides was not found. The three species were tested for resistance to malathion and fenitrothion, the most commonly used grain-protectant chemicals, by exposing adults to treated wheat. C. pusillus and C. pusilloides were susceptible to both malathion and fenitrothion (LC99.9 < 1 mg kg-1). C. ferrugineus, whilst susceptible to fenitrothion (LC99.9 < 1 mg kg-1) was resistant to malathion, with LC99.9 of 300-400 mg kg-1 compared with the recommended dose of 18 mg kg -1. Although C. pusillus was the most common species on farms, it was concluded that C. ferrugineus was the most important overall because it is biologically better suited to the grain in central storages, which is typically hot (>30�C) and of low moisture content (< 12% for wheat).

Migration of stored-grain insect pests from a small wheat bulk

1984 ◽  
Vol 24 (125) ◽  
pp. 260 ◽  
Author(s):  
ER Sinclair ◽  
J Alder
Keyword(s):  
Food Source ◽  
Insect Pests ◽  
Sitophilus Oryzae ◽  
Red Flour Beetle ◽  
Rhyzopertha Dominica ◽  
Stored Grain ◽  
Grain Beetles ◽  
Grain Bulks ◽  
Source Populations ◽  
Cryptolestes Pusillus

One hundred unsexed adults of each of the following coleopterous species were added to 27 .3 kg of clean wheat: Sitophilus oryzae (L.) (rice weevil), Rhyzopertha dominica (F.) (lesser grain borer), Tribolium castaneum (Herbst) (rust-red flour beetle), and the flat grain beetles Cryptolestes pusillus (Schonherr), C. ferrugineus (Stephens), and C. pusilloides (Steele and Howe). For 15 months, measurements were made of population size and emigration from this wheat bulk. The highest populations recorded for each species were: 138 850, 65 680, 9 060, 47 000, 15 530, 11 940, respectively, and total emigrant numbers during the period were: 774 682, 278 094, 123 784, 335 588, 39 070, 9 352, respectively. Such high numbers of emigrants in relation to relatively low source populations emphasize the significance of small amounts of infested grain as sources of infestation of large grain bulks, and hence the importance of grain hygiene. The proportion of females in the populations of four species changed significantly from 0.50 as populations developed. Emigration behaviour was influenced most commonly by temperature, insect numbers, and wheat age, but these factors did not act uniformly on all species. Negligible numbers of emigrants returned to the food source. Low numbers caught in food traps away from the source were consistent with these not being attractive but traps near the shed walls caught greater numbers than expected.

Thermal Acclimation in Several Species of Stored-Grain Beetles.

1981 ◽  
Vol 29 (4) ◽  
pp. 483 ◽  
Author(s):  
DE Evans
Keyword(s):  
Oxygen Consumption ◽  
Cold Acclimation ◽  
Rhyzopertha Dominica ◽  
Stored Grain ◽  
Chill Coma ◽  
Grain Beetles ◽  
Before And After ◽  
Resting Metabolism ◽  
Consumption Rates ◽  
The Mean

The chill-coma temperatures, oxygen consumption at several constant temperatures, and fresh weights of adults of Cryptolestes ferrugineus (Steph.), Oryzaephilus surinamensis (L.), Rhyzopertha dominica (F.) and Tribolium castaneum (Hbst.) were determined before and after acclimation for 14 days at 15 deg C in the laboratory in Australia. Acclimation lowered the mean chill-coma temperatures of all species, but most in O. surinamensis. The oxygen consumption of insects that were free to move and of insects restrained during respirometry was reduced by acclimation. The curves relating respiration rate and temperature were shifted downwards by cold acclimation, but its effect on their slopes (i.e. on temperature sensitivity) varied between and within species. Similarly, the relative proportions of the change in the consumption rates of free insects acclimated at 15 deg C that were attributable to locomotor activity or to resting metabolism varied considerably. The weights of C. ferrugineus and R. dominica were increased by cold acclimation, but those of the other 2 species were not.

SPATIO-TEMPORAL PATTERNS OF WORKFORCE IN INDIA DURING 1981-2011

2019 ◽  
Vol 38 (2) ◽  
pp. 239-254
Author(s):  
M.B. SINGH ◽  
◽  
NITIN KUMAR MISHRA ◽  
Keyword(s):  
Temporal Patterns ◽  
Spatio Temporal

Spatio-temporal Patterns and Driving Forces of Urban Expansion in Beijing Central City Since 1932

2010 ◽  
Vol 11 (4) ◽  
pp. 428-435 ◽  
Author(s):  
Wenhui KUANG ◽  
Quanqin SHAO ◽  
Jiyuan LIU ◽  
Chaoyang SUN
Keyword(s):  
Driving Forces ◽  
Central City ◽  
Urban Expansion ◽  
Temporal Patterns ◽  
Spatio Temporal

scholarly journals Spatio-temporal patterns of scrub typhus in mainland China, 2006-2017

2019 ◽  
Vol 13 (12) ◽  
pp. e0007916 ◽  
Author(s):  
Yujuan Yue ◽  
Dongsheng Ren ◽  
Xiaobo Liu ◽  
Yujiao Wang ◽  
Qiyong Liu ◽  
...  
Keyword(s):  
Scrub Typhus ◽  
Mainland China ◽  
Temporal Patterns ◽  
Spatio Temporal

scholarly journals Quantifying wildlife-livestock interactions and their spatio-temporal patterns: Is regular grid camera trapping a suitable approach?

2020 ◽  
Vol 117 ◽  
pp. 106565
Author(s):  
Roxana Triguero-Ocaña ◽  
Joaquín Vicente ◽  
Pablo Palencia ◽  
Eduardo Laguna ◽  
Pelayo Acevedo
Keyword(s):  
Temporal Patterns ◽  
Camera Trapping ◽  
Regular Grid ◽  
Spatio Temporal
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