Effect Of Relative Humidity On Adults Of 10 Different Species Of Stored Product Beetles

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Efficacy of diatomaceous earth to control the main stored

and Insecto), infested with 20 adults of each species and stored in a room with 25 ± 1 ºC of temperature and 60 ± 5 % of relative humidity. The diatomaceous earth used in wheat grain treatment were Keepdry at 500 and 1,000 g/ton of grain, and Insecto at 1,000 g/ton of grain and tested to control Sitophilus oryzae and Tribolium castaneum.


equations are then used to develop population models for the species. In order to investigate fully this approach to population modelling, a study was made of the laboratory population biology of two stored product beetles, Callosobruchus chinensis (L.) and C. malculatus (F.). The biology of these species is briefly reviewed in the next section.

Comparative Lethality of Rice Husk Ash and a Diatomaceous

25 ± 2° C and 60 ± 3% relative humidity. Each product was tested at 0.05 g to 0.5 g/20 g of grain respectively in glass Petri dishes against 20 adults of each beetle. Adult mortality was observed up to 10 days post treatment. RHA/DE mixtures (1:1, 3:1 and 1:3 ratios) were also tested at 2% of grain weight. Additionally, RHA and DE were

Toxic and residual effects of Azadirachta indica, Tagetes

week, all adults were removed from the jar and the media was kept in the growth chamber for the next 28-35 days for emergence of the Fl generation. The Fl generation insects were used for the experi-ments. All tests were carried out at 27-30 °C and 70-75 % relative humidity. 2.2 Preparation of extracts


different species of economically important dermestid beetles 48 Table 1.4 Stored-product pests (Coleoptera) with known symbiotic relationships 52 Table 2.1 Experiment 2 and 3 - Supercooling point (SCP) and lethal time (LT) in days to kill 50

jpht Effect of Three Essential Oils and Their Combination on

The medium was filled in plastic jars and adults were released in it. Pure culture of test insects were developed in the BOD incubator at 27 ± 1 °C temperature and 70 ± 5 per cent relative humidity. Plastic jars of 1.0 kg capacity were used for rearing purpose. At the center of the lid a hole of 1.8 cm

2 Biology, Behavior, and Ecology of Stored Grain and Legume

Stored Product Protection 3 hater 2 iooy, ehaior and Ecoo o Stored rain and eue nsects no live weevils but 10 other live insects injurious to stored grain. Insect tolerances are stricter in finished commodities such as flour or cornmeal. For example, the defect action level (or the maximum number of insects per-

Improving Efficacy of Beauveria bassiana against Stored Grain

IMI389521, against stored grain beetles in a series of bioassays. Our hypothesis was that the presence of kaolin would increase the pathogenicity of the fungus to the target insects. A variety of adult beetles were tested to determine if any effect of kaolin was species-dependent. As test insects we used three

Laboratory Studies on the Effect of Nitrogen gas (N2) on

conditions of 26 ±2c˚ and humidity of 70±5% in the incubator Infested cowpea seeds were prepared by relasing 1-day old adults (10 pairs for100 seeds) for a period of 24 h for oviposition / egg laying in culture jars Experiment was carried out using cowpea seeds infested with different developmental stages of C.maculatus, As

Fumigation toxicity of monoterpenoids to several stored

effects of different exposure times and temperatures of these three co~npounds to the red flour beetle. Evans (1987) noted that temperatures of 3540°C reduced oviposition and survivorship in most stored-product insects. In addition, we examined the effect of the presence of maize kernels


each host and artificial diet at each relative humidity level, 15 replications were made. These experiments were carried out at 30±1°C at CT room. From the experiments the following parameters were recorded for X. flavipes reared on different diet (prey species) and at different humidity levels. 1.

158 The effect of diapause and cold acclimation on the cold

residues on the product, and (iii) low risks to applicators (Fields 1992; Arthur 1996; Fields et al. 2011). There are many factors that determine the survival of insects at low temperature: temperature, duration of exposure, species, developmental stage, acclimation, diapause, relative humidity,


buildings, if the relative humidity is not too low, breeding will continue at a slow rate throughout the winter. Most heated buildings, however, arc so dry that little or no breed- ing takes place, although the adults remain active throughout thekernel winter. Beetles kept during the winter in an incubator, in which the relative humidity was high,

Interspecific interactions between beetles in multi-species

density for single species experiments was 10 adults, and 10 of each species in the multi-species treatments. Each experiment consisted of three replicates. All columns were kept in a temperature and humidity controlled cabinet (Thermo Fisher, Australia) at 30°C and 60% r.h. for 8 weeks.

Fumigant toxicity of essential oils and their combinations on

population buildup of three stored product coleoptera in stored wheat and their effect on quality of wheat. Material and Methods Culture of the insects Pure culture of test insects were developed in the BOD incubator maintained at 27°C±1 temperature and 70±5% relative humidity. Plastic jars of 1000 ml capacity were used for rearing of insects.


Effect of different temperatures on some biological parameters of the parasitoid A. calandrae: In the present study, the effect of different temperatures as abiotic factor on some biological parameters such as the duration of immature stages, adult longevity, parasitoid total numbers and the progeny sex ratio was examined.

Case History Control of Pests of Dried Fruits and Tree Nuts

broad, with length of exposure being a critical factor. Different species and developmental stages have different susceptibilities to temperatures. For high temperatures, most stored product insects will not survive more than 24 hours at 40°C, 12 hours at 45°C, 5 minutes at 50°C, 1 minute at 55°C, and 30 seconds at 60°C (Fields, 1992).

, Derčeva ulica 4, Ljubljana

Frank ARTHUR Current and Future Trends in Stored Product Entomology 15:45 Lidia LIMONTA, S. SAVOLDELLI, P. GIRGENTI, D.P. LOCATELLI Development of Tribolium castaneum on dust 16:00 George OPIT, Abena OCRAN, Kandara SHAKYA Survival of stored-product psocids (Psocoptera: Liposcelididae) at 43% and 50% relative humidity 16:15 L. DRIES-ZHANG

Insecticidal Toxicities of Glucosinolate containing Extracts

2 C, relative humidity 45 ± 5%, and a photoperiod of 10:14 (L:DI h. Bioassays of mosquito larvae. Ten mosquito larvae (early 2nd instar) were exposed to 20 ml of differently diluted extracts (with distilled waterl in a 50-ml jar. The larvae were transferred to the jar carefully with an eye dropper. The

Evaluation of Twenty Botanical Extracts and Products as

effect on progeny production in three stored-product beetles, Rhyzopertha dominica (lesser grain borer), Sitophilus oryzae (rice weevil) and Tribolium castaneum (red flour beetle); Demissie et al. (2008) evaluated the uses of some cooking oils (noug, soybean, sunflower, corn, olive oils) against maize weevil, Sitophilus zeamais, in stored maize

Differences in Defensive Volatiles of the Forked Fungus

different position on the ring), 4-ethylresorcinol. Data Analysis As different beetles produced different absolute amounts of volatiles (statistically determined to be unconnected to sex or food source), a relative peak area was computed for each peak by dividing its area by the total area of the seven major, identified peaks for that beetle.

23 Repellency Effect of Synthetic Volatiles and Essential

stored product insect culture at the Department of Entomology and these beetles were reared on healthy and clean grains/flour in glass jars. The test insects were mass cultured in 1kg capacity glass jar of size 15 × 10 cm containing respective food materials such as black gram for C. maculatus and wheat flour for T.

Comparative toxicity study of leaf, bark and stem extracts of

More than 600 species of Coleopteran pests attack stored products which cause quantitative and qualitative losses (Rajendran and Sriranjini 2008). Among the stored product pests, the rice weevil, Sitophilus oryzae L. (Coleoptera: Curculionidae) are the common and most destructive pest of the stored raw cereal grains in the world.


~e~endin~ on the species, 10 to 20 replicates of 1 to 3 adults, 5 to 10 nymphs, and 2 oothecae (n = 250 to 500) were used for exposures. Proceedings of the Second International Conference on Urban Pests K.B. Wildey (editor). 1996

Effect of particle size of two Iranian diatomaceous earth

running experiments. All adults used in the experiments were 7-14 days old of mixed sex. Wheat kernels were stored at -24°C, for at least 48 h. Before running the experiments, wheat kernels were kept for a week in an incubator set at 27 1°C and 55 5% R.H. to achieve the moisture content related to environmental relative humidity.

RESEARCH Open Access Effect of humidity on egg hatchability

85% relative humidity with a mean of 10.43±0.32 days. Effect of relative humidity on reproductive capacity Boring activity on cassava pellet was recorded within 24 hours of exposure under each relative humidity. Results in Table 2 show highly significant relative humidity effect on both D. minutus reproductive capacity (F=388.91,

Efficacy of Chrozophora plicata and Trianthema

optimum conditions of temperature and relative humidity (30±2ºC and 65±5%, respectively). Common wheat (Triticum aestivum, var. Nela), was utilized as culture media for Trogoderma granarium. Adults were sieved out and hundred beetles were released in properly labeled 500ml glass jars having 200gm of sterilized food

Effect of Packaging Materials and Time Period for Damage in

is the most serious stored product pest of damaged wheat and its by-products. The post-harvest losses by T. castaneum are estimated to be 15-20% which is great loss of millions of rupees in a developing country like Pakistan (Khattak & Shafique, 1986). Adult beetle and larvae feed on stored food stuff (Atwal, 1976; Dars et al., 2001).

Effect of Temperature and Humidity on the Culture of

Larvae of this species are more sensitive than eggs to extreme conditions. No larvae pupated at 40⁰C and 90, 30 and 10 percent humidity, but a few are pupated at this temperature and 70, 50 percent relative humidity. At 28⁰C no pupae formed at 10 percent relative humidity, but high proportions of larvae became adults at higher relative

A Bibliography of Maize Weevils, Sitophilus zeamais

Mostarticlespublishedsince. the. originaldescription. ofthe. species. in 1855. through. 1985. havebeenincluded hereexceptunpublishedtheses. and. dissertations

y & H erp tl Karim and Hossein and, Entomol Ornithol Herpetol

Citation: Karim S, Hossein P (2018) Insecticidal Activity of Four Plant Essential Oils against Two Stored Product Beetles.Entomol Ornithol Herpetol 7: 213. doi: 10.4172/2161-0983.1000213

Aiming for the management of the small hive beetle, Aethina

Relative humidity (RH) appears to impact the survival of stored product beetles in relation to treatment with DE (Völk et al. 2004). It is not known how RH affects the survival of SHB when DE is applied or whether factors such as the presence or absence of food modify the effect. But Buchholz et al. (2009) have shown that DE does

Methods of pest prevention during storage, transportation and

Frank ARTHUR Current and Future Trends in Stored Product Entomology 16:30 Lidia LIMONTA, S. SAVOLDELLI, P. GIRGENTI, D.P. LOCATELLI Development of Tribolium castaneum on dust 16:45 George OPIT, Abena OCRAN, Kandara SHAKYA Survival of stored-product psocids (Psocoptera: Liposcelididae) at 43% and 50% relative humidity

Fumigant Toxicity of Ricinuscommunis L.Oilon Adults and Larva

T.confusum adults were hightest only in 10% concentration while all concentrations caused significant mortalities in the adults of T. granarium,especially 10% which killed all the beetles ,on the other hand the highly toxic concentrations of castor oil on T.confusum larva were 5% and 10% while all concentrations were

Susceptibility of endemic and exotic North American ladybirds

within the same habitats, to a low dosage of different sources of B. bassiana. Here we examine the suscepti-bility of these species to B. bassiana as derived from (1) a naturally-infected O. v-nigrum adult; (2) a commercial product and (3) the susceptibility of only the native spe-cies to B. bassiana from the soil of a pecan orchard. MATERIAL

Repellent activity of common spices against the rice weevil

of air at 28±2oC and 70-80% relative humidity adults after different exposure times using the filter paper test. on three species of stored-product beetles


0 C) and relative humidity (70 + 5%) room. Groups of 50 adults, 7-10 days old, were collected from cultures and each species was exposed, on 3 g of appropriate food, to different atmospheric ga s mi xtures in a chamber of 100 ml capacity (Navarro and Donahaye, 1972).


and 10 ppm) along with a control, using four replicates for each treatment. After treatment all these jars were kept into the incubator (Model MIR-254, SANYO) under optimum conditions (i.e., Temperature 30±2°C; Relative humidity 65±5% and Photoperiod of 16:8 L:D). After one week exposure to IGRs, adults were removed from the treated and