scholarly journals Study of Morphometric Aspects of Eri Silkworm (Samia ricini D.) reared on the host plant

2020 ◽  
pp. 192-196
Keyword(s):  
Host Plant ◽  
Significant Role ◽  
Environmental Conditions ◽  
Ricinus Communis ◽  
Larval Period ◽  
Larval Duration ◽  
Larval Weight ◽  
Larval Length ◽  
Qualitative Characters

The environmental conditions play a significant role and influence the quantitative and qualitative characters of silkworm such as larval length, larval breadth, larval weight and larval duration. Larvae of Eri silkworm (Samia ricini D.) were reared on Castor leaves (Ricinus communis). The data that were recorded for larval length (cm) from first to fifth instar are 0.76 ± 0.003; 1.49 ± 0.023; 3.09 ± 0.020; 4.39 ± 0.04 and 6.57 ± 0.04 respectively, for larval breadth (cm) are 0.122 ± 0.007; 0.24 ± 0.0; 0.46 ± 0.0; 0.74 ± 0.0 and 1.14 ± 0.0 respectively and for larval weight (g) are 0.007 ± 0.01; 0.033 ± 0.02; 0.37 ± 0.01; 1.07 ± 0.02 and 3.74 ± 0.03 respectively and the larval period of the reared larvae lasted for about 20 days.

scholarly journals Rearing performance of Philosamia ricini (Eri silkworm) in different seasons of Ujjain district

2014 ◽  
Vol 15 (3) ◽  
pp. 109-113
Author(s):  
Shubhangi Vaidya ◽  
Ulka Yadav
Keyword(s):  
Ricinus Communis ◽  
Spring Season ◽  
Larval Weight ◽  
Shell Weight ◽  
Philosamia Ricini ◽  
Natural Silk ◽  
Larval Length ◽  
Autumn Season ◽  
Different Seasons ◽  
Eri Silk

India has the unique distinction of being only country producing all the five commercially traded varieties of natural silk namely Mulberry, Eri, Muga, Temperate tasar and Tropical tasar. The silk produced by Philosama ricini is called Eri silk. Eri silk is known as Non Violence silk or Piece silk. It is also said to be Poor Person’s silk. The Eri silkworm (Philosamia ricini) is multivoltine, holometabolus, non-mulberry, completely domesticated and feed on castor (Ricinus communis) leaves.We observed the effect of different seasons on rearing performance of Eri silkworm in respect of different larval parameters (larval weight, larval length, ERR% and pupation) and cocoon parameter (cocoon weight, pupae weight, shell weight & shell %). Our findings clearly indicated that the rearing performance of Eri silkworm was better in spring season than winter and autumn season of Ujjain district M.P.

Olfactory responses and feeding preferences of Copitarsia uncilata (Lepidoptera: Noctuidae) to four aromatic herb specie

2017 ◽  
Vol 43 (2) ◽  
pp. 179
Author(s):  
Miguel Mendieta ◽  
Andreas Gaigl ◽  
Juan Carlos Getiva de la Hoz ◽  
Anibal Orlando Herrera
Keyword(s):  
Host Plant ◽  
Feeding Preferences ◽  
Larval Weight ◽  
Olfactory Responses ◽  
Host Selection Behavior ◽  
Selection Behavior ◽  
Larva Feeding ◽  
Plant Choice ◽  
Lepidoptera Noctuidae ◽  
Aromatic Herbs

Colombian aromatic herbs have great potential as an export commodity. The genus Copitarsia is considered as an economic and a quarantine pest attacking them. In herbivore insects, host plant choice is made by adults and influenced by host plant quality. There were performed olfactory and feeding tests by using four-arm olfactometer and offering four different aromatic herbs (basil, mint, rosemary, or thyme) to determine the host selection behavior of Copitarsia uncilata Burgos and Leiva. Parameters, such as adult choice, larval weight, and time spent by larva on particular herb were measured. The preferences of adults and immature of C. uncilata varied significantly among the herbs in olfactory and larva feeding tests. The adults showed significantly higher responses to essential oils of basil and rosemary. Higher weight of larva was recorded on mint and basil. Further studies on larval development and longevity of adults on different herbs are necessary.

scholarly journals Interspecific Variations in Duration of Tail Regression in Two Tropical Anurans

2015 ◽  
Vol 2015 ◽  
pp. 1-8
Author(s):  
Cuckoo Mahapatra ◽  
Pravati Kumari Mahapatra
Keyword(s):  
Environmental Conditions ◽  
Rainy Season ◽  
Larval Period ◽  
Evolutionary Strategies ◽  
Interspecific Difference ◽  
Extreme Temperatures ◽  
Larval Phase ◽  
Morphological Variations ◽  
Interspecific Variations ◽  
Tadpole Tail

Anurans breed in an array of habitats and hence employ a variety of evolutionary strategies to adapt to the variable conditions. Particularly, since they undergo a larval phase they develop mechanisms to overcome unfavourable conditions like desiccation, extreme temperatures, and so forth. The anurans, Polypedates maculatus and Duttaphrynus melanostictus, show noticeable variation in the duration of larval period and tadpole tail regression. D. melanostictus breeds throughout the year and hence is subjected to different environmental conditions as compared to P. maculatus which breeds only during the rainy season. Thus, the tadpoles of D. melanostictus have selected to undergo a shorter larval period and duration of tail regression to suit their breeding habits. The present study correlates the interspecific difference in the duration of tail regression with the morphological variations in the tails of the two species. D. melanostictus shortens the duration of larval tail regression by having comparatively larger and more number of melanocytes and a thinner notochord than P. maculatus.

scholarly journals Development of gypsy moth (Lymantria dispar L) on the foliage of Quercus cerris L., Q. Petraea (matt) Liebl. and Q. Robur L. in the controlled conditions

2007 ◽  
pp. 55-67 ◽  
Author(s):  
Slobodan Milanovic
Keyword(s):  
Relative Humidity ◽  
Host Plant ◽  
Gypsy Moth ◽  
Lymantria Dispar ◽  
Environmental Conditions ◽  
Quercus Robur ◽  
Quercus Petraea ◽  
The Other ◽  
Study Results ◽  
Quercus Cerris

The development of Gypsy moth (Lymantria dispar L) was monitored in laboratory conditions, on the foliage of the species Quercus cerris L. Quercus petraea (Matt) Liebl. and Quercus robur L. The experiment was established in the controlled environmental conditions, at the temperature of 25?C, photoperiod 14:10 (day: night) and relative humidity 70%. The objective of the research was to determine the suitability of the study host plant species for gypsy moth development. The study results show that Gypsy moth caterpillars cultivated on Q. petraea foliage had a lower survival, higher number of moultings, longer preadult development and lower fecundity, which makes this species less suitable compared to the other two. Gypsy moth caterpillars cultivated on Q. cerris foliage had the highest survival degree the lowest number of moultings, the shortest preadult development and the highest fecundity, which makes this species the most favourable for gypsy moth development. Q. robur was between the former two species in this respect.

Evaluation of Aegilops tauschii (Coss.) germplasm for Karnal bunt resistance in a screen house with simulated environmental conditions

2008 ◽  
Vol 6 (02) ◽  
pp. 79-84 ◽  
Author(s):  
Parveen Chhuneja ◽  
Satinder Kaur ◽  
Kuldeep Singh ◽  
H. S. Dhaliwal
Keyword(s):  
Host Plant ◽  
Plant Resistance ◽  
Environmental Conditions ◽  
Host Plant Resistance ◽  
Aegilops Tauschii ◽  
Karnal Bunt ◽  
Tilletia Indica ◽  
D Genome ◽  
Moderately Resistant ◽  
Screen House

Karnal bunt (KB) of wheat, caused byTilletia indica(Mitra) Mundkur, adversely affects international wheat trading and the movement of germplasm between countries due to quarantine restrictions. Breeding for host plant resistance requires the identification of KB resistance sources. Accessions of the D genome progenitor of bread wheat,Aegilops tauschii, were screened in a specially designed screen-house, where the optimum environmental conditions conducive for KB development were simulated by controlling temperature, humidity, fogging and shading. The 183 accessions were subjected to artificial inoculation with a mixture of nine KB isolates, and seven proved highly resistant and four moderately resistant over three rounds of screening over 3 years.

The unity of characters: ecological and morphological specialisation in larvae of Hawaiian platynine Carabidae (Coleoptera)

2000 ◽  
Vol 14 (6) ◽  
pp. 931 ◽  
Author(s):  
James K. Liebherr
Keyword(s):  
Life History ◽  
Egg Size ◽  
Life History Traits ◽  
Phylogenetic Inference ◽  
Larval Period ◽  
Larval Duration ◽  
Similar Treatment ◽  
First Instar ◽  
Functional Linkage ◽  
History Information

Life history information and first instar egg bursters are compared for larvae of 25 species across the monophyletic radiation of Hawaiian Platynini (Coleoptera : Carabidae). The plesiotypic larval duration is approximately five weeks, with derived extension of the larval period having evolved during phylogenetic diversification of the radiation. This extension in larval duration is associated with vestigialisation of the metathoracic flight wings. Egg size is larger in those brachypterous species with slower developing larvae, reflecting pervasive ecological specialisation of these taxa in the isolated, favourable, and temporally stable habitats of Hawaiian montane forests. First instar egg bursters are also compared across these taxa, with evolution of a keel-like egg burster congruently defining a clade also characterised by longer larval duration and larger egg size. A functional linkage between egg burster configuration and egg size is rejected by lack of any association between egg size and egg burster type in the related genus Calathus. Such rejection does not reduce the value of the egg burster for phylogenetic inference. The ability to assess taxa for both life history traits and egg burster configuration argues for similar treatment of all such characters, both ecological and morphological, when estimating phylogeny.

Refinement and evaluation of artificial diet for rearing of legume pod borer, Maruca vitrata Geyer (Lepidoptera: Crambidae)

2017 ◽  
Author(s):  
Rachappa V. ◽  
S. G. Hanchinal ◽  
Chandra Shekhara ◽  
Sweta Surpur ◽  
B. V. Patil ◽  
...  
Keyword(s):  
Host Plant ◽  
Artificial Diet ◽  
Natural Host ◽  
Larval Duration ◽  
Egg Hatching ◽  
Pod Borer ◽  
Legume Pod Borer ◽  
Successive Generations ◽  
Modified Diet ◽  
Plant Growth Chamber

The investigation on refinement and evaluation of artificial diet for M. vitrata, were carried out during 2014 and 2015 under walk in plant growth chamber established at ARS, Gulbarga, Karnataka, India. Comparison of developmental parameters of three successive generations of M. vitrata reared on different diets revealed that, maximum survival of egg, larva and pupa was 78.4 ± 3.1, 67.6±5.5 and 73.0±5.0 respectively in modified D-OOD diet and was superior over rest of the diets (D-OOD, D-New and D-OO) while it was on par with natural host plant. Maximum fecundity of 62.34±4.1 eggs/female was observed in refined D-OOD diet was on par with pigeonpea host plant and superior over other diets. Biology studies of Maruca on refined artificial diet in comparison with natural host plant pigonpea were revealed that, incubation period (2.6 ± 0.46 and 2.85 ± 0.40 days), total larval duration (14.28± 1.02 and 14.78±1.52 days), pupal period (9.41±0.70 days and 10.33±1.08 days) did not vary significantly between modified diet and natural host. Fecundity in refined artificial diet was 66.00 ± 4.00 and it was 65.99± 7.02 eggs on natural host plant. Per cent egg hatching was almost same in both the cases.

scholarly journals Biological Security of Polish Military Contingents Outside the Country

2019 ◽  
Vol 5 (2) ◽  
pp. 62-67
Author(s):  
Beata Osiak
Keyword(s):  
Significant Role ◽  
Environmental Conditions ◽  
Climatic Conditions ◽  
Cultural Barriers ◽  
Tropical Diseases ◽  
Biological Safety ◽  
The North ◽  
The World ◽  
North And South ◽  
The Eu

Polish soldiers have been participating in peacekeeping and stabilization missions around the world for several decades under the auspices of the UN, OSCE, NATO and the EU. They were first sent to Korea in 1953 to oversee a ceasefire between the North and South Koreas. Since then, nearly 70,000 Polish troops have taken part in 58 peace and humanitarian multinational missions on different continents (SKMP ONZ, 2019), which required from them great skills to cooperate with soldiers from other countries, to overcome cultural barriers,  as well as adaptation to difficult, often completely different than in Europe, climatic conditions,  and to create a system of safeguards and procedures against dangerous tropical diseases. Due to these reasons, biological safety, i.e.,  medical, sanitary-hygienic, and anti-epidemic security of the contingent, plays a significant role in every mission because it allows the soldiers and civilian personnel stay healthy in an unfavorable and different climate and environmental conditions.

Behavior of14C-Haloxyfop in Common Bermudagrass (Cynodon dactylon) Stolons

Weed Science ◽  
1987 ◽  
Vol 35 (5) ◽  
pp. 599-603 ◽  
Author(s):  
Horacio L. Maroder ◽  
Imelda A. Prego ◽  
Maria A. Cairoli
Keyword(s):  
Methyl Ester ◽  
Significant Role ◽  
Environmental Conditions ◽  
Cynodon Dactylon ◽  
Leaf Surface ◽  
Early Summer ◽  
Propanoic Acid ◽  
Different Seasons ◽  
Early Fall ◽  
Common Bermudagrass

The behavior of the methyl ester of14C-haloxyfop {2-[4-[[3-chloro-5-(trifluoromethyl)-2-pyridinyl] oxy] phenoxy] propanoic acid} in common bermudagrass [Cynodon dactylon(L.) Pers. # CYNDA] stolons was examined in greenhouse experiments at two different seasons. The14C from the herbicide applied on the leaves of a stolon node translocated no more than 3% of the applied radioactivity to the apex and base. Movement out of stolons was not significant. In early summer less than 1% translocated in each direction; in early fall more than 2% moved to the apex and less than 1% toward the base. Decrease of14C recovery with time was evident in both seasons, particularly in early summer. Haloxyfop volatilization from the leaf surface apparently plays a significant role in recovery decrease. The14C found in stolons in early summer was approximately the same as that of early fall, although herbicide remaining available for uptake on the leaf surface was lower in the former season. We suggest that environmental conditions that favor volatilization could enhance uptake.

Sign in / Sign up

Export Citation Format

Share Document