Smallholder farmers are responding by over-applying pesticides, increasing the application frequency or switching to non-recommended pesticides; leading to a pesticide treadmill. Gelechiidae, twirler moths) has a wing span of up to 18 mm. DNA barcoding is also presented as a valuable tool to complement traditional taxonomy for rapid and accurate identification of these species of agronomic interest. CAB Direct The studies showed that pink stem borer is able to complete its life cycle on wheat crop. /PageMode /UseNone The main damage caused is the erosion of the grains. Observed abiotic stress tolerance may explain the ubiquitous distribution of S. cerealella in Africa which is likely to enhance its survival and increase its pest status under global change. Biology: Eggs - 40 to 150 eggs laid on grain surface. 2010). The length of male and female was 11.2 ± 0.09 and 12.07 ± 0.06 mm respectively. Larvae - Bore into grain, staying until pupation. moths were sorted out under a simple microscope by observing their abdominal tergites. Sitotroga cerealella- Angoumois grain moth Description Life cycle Biology . Pupae - Form in grain. Gelechiidae, twirler moths) has a wing span of up to 18 mm. * Estimated from cycling temperature data. Journal of the Asiatic Society of Bangladesh Science, Shahjalal University of Science and Technology. moth, Sitotroga cerealella Oliv. after mating and least on the fourth night. the most promising medium which favourably influenced the incubation period, Duration of different larval instars, adult emergence percentage, longevity of male and female, fecundity, sex ratio and growth index. Agricultural University, was used for this investigation. This moth is a pest of whole cereal grain and will attack grain before harvest, particularly maize. by camel hair brush with the help of stereomicroscope with 100 unhusked sound rice grains treated with quick lime at the aforementioned quantities each, covered with cloth sheet, tighten with rubber band, ... Total of 3.40 ± 0.24 & 3.80 ± 0.20 days were required for prepupal stage, opposed to 5.20 ± 0.20 and 5.0 days for pupal stage under the laboratory conditions ( Table 2). /F8 32 0 R If compared with the few other life table studies conducted on this species on maize in India and North America, some variation among the strains becomes evident. /PageLayout /SinglePage In Canada, is found only in southern Ontario; Life history. Grain samples were collected at 8-week intervals throughout a 10 month period in the 2014/15 and 2015/16 storage seasons. Join ResearchGate to find the people and research you need to help your work. Adults of both secondary pest species were allowed to oviposit for 3 wk on intact kernels of 'DeKalb 689', mechanically split kernels, kernels that had been infested for 3 mo by S. cerealella, and kernels that had been infested for 6 mo. The calculated maximum N doses were 109, 103, 115 and 116 kg ha-1 for 25 ×10, 25 ×15, 25 ×20 and 30 ×20 cm spacings, respectively and the calculated optimum N doses were 104, 99, 106 and 112 kg ha-1 for 25 ×10, 25 ×15, 25 ×20 and 30 ×20 cm spacings, respectively. of science and scholarship, and a major part of its output appears in foreign Its mean larval period was 68.52±7.38 days while mean pupal period was 36.04±0.78 days (male) and 37.78±0.38 days (female). The results showed that to survive desiccating grain storage environments, S. cerealella relied more on high body water content (BWC) (70.2 ± 3.72%) compared to lipid reserves (9.8± 0.81%). /XObject << A common conclusion for the current study and previous ones is that optimal population development for S. cerealella occurs at ≈30°C and at high humidity. The effects of four temperatures (20, 25, 30, and 35°C) and two relative humidity levels (44 and 80%) on developmental time, age-specific survivorship and fecundity, sex ratio, and intrinsic rate of natural increase (rm) of S. cerealella were investigated. This item is part of JSTOR collection The warm mean temperatures (23.6 ± 0.8°C) in Harare during the 2014/15 storage season, with mean temperature range of 22-24°C, favoured the development of S. oryzae and S. cerealella which develop well between temperatures of 18-30°C (Mason and Mcdonough, 2012; Cogburn, R.R. The results show that differences in climatic conditions influence insect pest species dynamics and response to pesticide treatments. (Lepidoptera: Gelechiidae), is a cosmopolitan and most destructive primary insect pest of several stored grains. Paddy rice grains are natural food for storage pests like Sitotroga. The, were kept into a glass tube with labeling and st. C temperature to ensure continuous supply for future study. Morphometrics and other aspects of life stages were recorded on MTU-1001, which showed that the mean number of eggs laid/female was 94.76, and it … aracteristics of the larvae and pupae were, crevices and holes of storage structures and, e, oviposition period was found to be 3.67 ±, laid at different days on rice grains in the, . Insect pests damage different t, serious loss to national economy. The larvae, which are up to 7 mm long, start as a yellowish-red colour, then turn white. CAB Direct is the most thorough and extensive source of reference in the applied life sciences, incubation period was 7.40±0.38 days. Adult: Wings pale greyish brown with black spot towards tip (in fresh specimens) and is smaller in size than other storage moths. Hatching percentages among Sitotroga cerealella eggs were 95.57±0.61 and 96.55±0.62, respectively being nonsignificntly, different. cerealella, a major insect that appears during paddy storage.

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