scholarly journals Biology of Coccinella transversalis Muls. (Coleoptera: Coccinellidae)

2005 ◽  
pp. 43-52
Author(s):  
Brenda Balbarino ◽  
Maria Juliet Ceniza
Keyword(s):  
Adult Emergence ◽  
Developmental Period ◽  
Aphis Craccivora ◽  
Larval Instars ◽  
Black Bean ◽  
Pupal Period ◽  
Laboratory Conditions ◽  
Development Period ◽  
Coccinella Transversalis ◽  
Black Bean Aphid

The biology of Coccinella tranversalis reared on black bean aphid, Aphis craccivora was studied in the laboratory. The beetle passed through the egg, 4 larval instars, pupa and adult stages. The eggs were spindle-shaped and had an incubation of 2-3 days with an average of 2.85 days. The larvae which were typically black with orange bands or tinge on the methoracic region and some part of the abdomen had a total development period of about 6-9 days, with an average of 7.27 days. The pupal period lasted for about 3-4 days, or 3.83 days on the average. The total developmental period from egg to adult emergence took about 13-15 days. The adults which were typically red orange with black inverted v markings on the elytra lived for an average of 51.34 days. The female laid an average of 1000 eggs under laboratory conditions.

scholarly journals Functional and Numerical Responses of Scymnus Syriacus Marseul (Coleoptera: Coccinellidae) to the Black Bean Aphid, Aphis Fabae Scopoli (Hemiptera: Aphididae) Under Laboratory Conditions

2011 ◽  
Vol 51 (4) ◽  
pp. 423-428 ◽  
Author(s):  
Reza Sabaghi ◽  
Ahad Sahragard ◽  
Reza Hosseini
Keyword(s):  
Functional Response ◽  
Prey Density ◽  
Least Square ◽  
Aphis Fabae ◽  
Type Ii ◽  
Black Bean ◽  
Laboratory Conditions ◽  
And Function ◽  
Type Ii Functional Response ◽  
Black Bean Aphid

Functional and Numerical Responses ofScymnus SyriacusMarseul (Coleoptera: Coccinellidae) to the Black Bean Aphid,Aphis FabaeScopoli (Hemiptera: Aphididae) Under Laboratory ConditionsFunctional and numerical responses are basic to any investigation of predator-prey relationships and key components in the selection of predators for biological control. In this study, functional and numerical responses of the female and male ladybeetles,Scymnus syriacusMarseul to different densities of third instar nymphs ofAphis fabae(i.e.5, 10, 20, 30, 40, 60 and 80) as prey, were studied in a growth chamber (25°C, 65±5% RH and a photoperiod of 16L : 8D h) on the broad bean,Vicia fabaeLinn. Using the logistic regression, a type II functional response for both female and male ladybeetles was determined. Using Nonlinear least-square regression, the searching efficiency (a') and handling times (Th) of the female and male adults were estimated as 0.123±0.006 h, 0.434±0.012 h and 0.115±0.008 h, 0.514±0.016, respectively. The Rogers model was used to estimate the maximum theoretical predations (T/Th) for female and male, which were 55.18 and 46.64, respectively. These results indicated a higher efficiency in female ladybeetles. The reproductive numerical response, in terms of eggs laid, increased curvlinearly with increasing prey density. The reproductive response trend was similar to the shape of the type II functional response. This similarity means both responses are interlinked and function simultaneously. The efficiency of the ingested food conversion (ECI) of the females decreased with prey density, as females laid 25±0.65 eggs when exposed to the highest prey density (80) and 3±0.44 eggs at lowest prey density (5).

DEVELOPMENT OF TIPHODYTES GERRIPHAGUS (HYMENOPTERA: SCELIONIDAE) IN LIMNOPORUS DISSORTIS EGGS (HEMIPTERA: GERRIDAE)

1999 ◽  
Vol 131 (2) ◽  
pp. 219-228 ◽  
Author(s):  
João M. Sousa
Keyword(s):  
Sex Ratio ◽  
Larval Stage ◽  
Host Feeding ◽  
Larval Instars ◽  
Pupal Period ◽  
Laboratory Conditions ◽  
Total Length ◽  
Preimaginal Development ◽  
First Instar ◽  
Mandible Length

AbstractInvestigations of preimaginal development in Tiphodytes gerriphagus Marchal reveal two larval instars, based on counting exuviae and comparing mandible length during development within Limnoporus dissortis Drake & Harris eggs. Tiphodytes gerriphagus eggs are stalked, as is typical of scelionids, and are 282.6 ± 3.48 μm (mean ± SE) long. The chorion ruptures at 8–9 h postoviposition and releases a nonfeeding embryo into the host. Feeding begins at 18–20 h postoviposition, after the embryonic cuticle is shed and a fully differentiated and active larva is released. The first larval stage is teleaform and lasted up to 5 days postoviposition, and its total length increased from 183.6 ± 3.35 to 517.0 ± 14.67 μm. The second larval stage is hymenopteriform and lasted from 5 to 13 days postoviposition, and grew from 920.2 ± 24.65 to 1352.4 ± 11.89 μm total length before pupating. The pupal period lasted about 11 days, with male pupae being shorter and thinner than female pupae. These findings differ from previous descriptions of T. gerriphagus, and it is suspected that the first instar was mistakenly divided into two stadia. The sex ratio under laboratory conditions was female biased (22% males), and males were smaller but did not emerge significantly earlier than females.

scholarly journals Reactions of Some Varieties of Pearlmillet, Pennisetum glaucum (Linn.) R. Br. emend Stuntz. to Rice Moth, Corcyra cephalonica Staint.

2021 ◽  
Author(s):  
Anita Sharma ◽  
K C Kumawat ◽  
S K Khinchi
Keyword(s):  
Pennisetum Glaucum ◽  
Adult Emergence ◽  
Developmental Period ◽  
Corcyra Cephalonica ◽  
Seed Damage ◽  
Laboratory Conditions ◽  
Susceptibility Index ◽  
Weight Losses ◽  
Grain Damage ◽  
Rice Moth

Abstract Ten varieties of pearlmillet (RHB-173, RHB-177, MPMH-17, HHB-67, Pro Agro-9450, Pro Agro-9001, Pioneer 86 m 86, Pioneer 86 m 84, Pioneer 86 m 38 and Raj-171.) were evaluated for reaction to Corcyra cephalonica Staint. in the laboratory conditions. The adult emergence (F1), weight losses and susceptibility index in these varieties were ranged from 9.33-32.00, 10.44–31.69% and 2.77–6.82, respectively, the minimum in Pioneer 86 m 86 and maximum in Raj-171; other varieties were in the middle order. The seed damage recorded in different varieties ranged from 23.67–75.84%, the minimum in Pioneer 86 m 86 (23.67%), Pro Agro-9450 (25.55%) and Pro Agro-9001 (28.33%), these treatments were found at par each other. The Raj-171 was found to be badly infested (75.84% grain damage) which differed significantly over other varieties. The developmental period of the pest varied from 50.88–80.61 days in different varieties, minimum being in Raj-171 and maximum in Pioneer 86 m 86.

scholarly journals Prey quantity affects development, survival and reproductive attributes of Coccinella transversalis Fabricius, 1781 under laboratory conditions

2020 ◽  
Vol 4 (1) ◽  
pp. 8-15
Author(s):  
Mahadev Bista
Keyword(s):  
Mass Culture ◽  
Growth Index ◽  
Adult Emergence ◽  
Developmental Rate ◽  
Reproductive Rate ◽  
Oviposition Period ◽  
Reproductive Parameters ◽  
Laboratory Conditions ◽  
Aphid Prey ◽  
Coccinella Transversalis

This study assessed development, survival and reproductive parameters of a ladybird beetle, Coccinella transversalis Fabricius, 1781 on different quantities (viz. scarce, optimum and abundant) of the bean aphid prey, Aphis craccivora under laboratory conditions (27 ±1°C; 65 ±5% relative humidity and 14 light: 10 dark hours photoperiod). The pre-oviposition period was the shortest (6.40 ±0.40 days) on abundant prey and longest (9.20±0.49 days) on scarce prey. The oviposition period significantly increased with increasing prey quantity, being longest (55.10 ±1.75 days) on abundant prey and shortest (38.50 ±2.14 days) on scarce prey. Lifetime fecundity and egg viability were recorded the highest (1604.10 ±45.61 eggs and 90.82 ±0.80%, respectively) on abundant diet and lowest (794.60 ±30.84 eggs and 82.72 ±0.67%, respectively) on scarce diet. Reproductive rate, reproductive time ratio, longevity of male and female were all highest, i.e. 29.20 ±0.61 egg/day, 3.70 ±0.26, 65.80 ±1days and 70.30 ±1.30 days, respectively on abundant diet. These parameters were lowest, i.e. 20.90 ±0.83 eggs/day, 1.95 ±0.16, 58.80 ±1.60 days and 56.20 ±1.75 respectively on scarce diet. Development was fastest on abundant prey followed by optimum and slowest on scarce prey. Percentage pupation, percent adult emergence, developmental rate, growth index and generation survival were all highest, i.e. 84.00 ±3.68%, 79.00 ±4.09%, 0.077 ±0.00 day-1, 3.50 ±0.19 day-1, 0.54 ±0.05, respectively when larvae were reared on abundant prey. The same parameters were lowest, i.e. 65.00 ±04.79%, 57.00 ±4.99%, 0.062 ±0.001 day-1, 10.46 ±0.11 day-1, 0.25 ±0.0, respectively on scarce prey. It may therefore be concluded that the availability of abundant prey enhances developmental and reproductive parameters of C. transversalis, and abundant diet of aphid prey may be used for better mass culture of ladybird beetles in laboratories for augmentative biological control of aphids.

Life History of Choristoneura lambertiana subretiniana Obraztsov (Lepidoptera: Tortricidae) Attacking Lodgepole Pine

1965 ◽  
Vol 97 (7) ◽  
pp. 684-690 ◽  
Author(s):  
R. W. Stark ◽  
J. H. Borden
Keyword(s):  
Life History ◽  
Ponderosa Pine ◽  
Lodgepole Pine ◽  
Adult Emergence ◽  
Larval Instars ◽  
Pupal Period ◽  
First Instar ◽  
History Of

AbstractThe life history of a tortricid cone moth Choristoneura lambertiana subretiniana Obraztsov in California is described. The larvae feed primarily on staminatc flowers and cones of lodgepole pine although some needle- and tip-mining occurs. The only other recorded host is ponderosa pine.Eggs are deposited in late July to early August; first-instar larvae migrate from the needles to protected locations on the branches and spin hibernacula. The larvae overwinter predominantly as second-instar larvae in the hibernaculum. They emerge from the hibernacula in April, and mature in four to six weeks. There are six larval instars. The pupal period lasts approximately two weeks; adult emergence begins in mid-July and extends through the end of August.

scholarly journals Reactions of Some Varieties of Pearlmillet, Pennisetum glaucum (Linn.) R. Br. emend Stuntz. to Rice Moth, Corcyra cephalonica Staint

2021 ◽  
Author(s):  
Anita Sharma ◽  
K.C. Kumawat ◽  
S.K. Khinchi
Keyword(s):  
Pennisetum Glaucum ◽  
Adult Emergence ◽  
Developmental Period ◽  
Corcyra Cephalonica ◽  
Seed Damage ◽  
Laboratory Conditions ◽  
Susceptibility Index ◽  
Weight Losses ◽  
Grain Damage ◽  
Rice Moth

Abstract Ten varieties of pearlmillet (RHB-173, RHB-177, MPMH-17, HHB-67, Pro Agro-9450, Pro Agro-9001, Pioneer 86 m 86, Pioneer 86 m 84, Pioneer 86 m 38 and Raj-171.) were evaluated for reaction to Corcyra cephalonica Staint. in the laboratory conditions. The adult emergence (F1), weight losses and susceptibility index in these varieties were ranged from 9.33-32.00, 10.44-31.69% and 2.77-6.82, respectively, the minimum in Pioneer 86 m 86 and maximum in Raj-171; other varieties were in the middle order. The seed damage recorded in different varieties ranged from 23.67-75.84%, the minimum in Pioneer 86 m 86 (23.67%), Pro Agro-9450 (25.55%) and Pro Agro-9001 (28.33%), these treatments were found at par each other. The Raj-171 was found to be badly infested (75.84% grain damage) which differed significantly over other varieties. The developmental period of the pest varied from 50.88-80.61 days in different varieties, minimum being in Raj-171 and maximum in Pioneer 86 m 86.

scholarly journals Evaluation of indigenous the nucleopolyhedrovirus (NPV) of Spodoptera litura (Fabricius) (Lepidoptera: Noctuidae) in combination with chlorantraniliprole against Spodoptera species

2021 ◽  
Vol 31 (1) ◽  
Author(s):  
Ghulam Sarwar ◽  
Naeem Arshad Maan ◽  
Muhammad Ahsin Ayub ◽  
Muhammad Rafiq Shahid ◽  
Mubasher Ahmad Malik ◽  
...  
Keyword(s):  
Larval Mortality ◽  
Adult Emergence ◽  
Lethal Concentration ◽  
Pest Species ◽  
Vegetable Crops ◽  
Chemical Insecticide ◽  
Larval Instars ◽  
Novel Method ◽  
High Larval Mortality ◽  
Lepidoptera Noctuidae

Abstract Background The armyworms, Spodoptera exigua (Hübner), and S. litura (Fabricius) (Lepidoptera: Noctuidae) are polyphagous pests of many cash crops. Heavy crop losses have been reported for the fruit and vegetable crops each year owing to the diverse impact on global economies. The present study was aimed to sort out a novel method of pest control using the insect’s own nucleopolyhedrosis virus (NPV) alone and in combination with a new chemistry insecticide chlorantraniliprole. Results In the study, the effect of indigenous isolated nucleopolyhedrovirus (NPV) and the chemical insecticide (chlorantraniliprole) formulations against the 2nd and 4th larval instars of S. litura and S. exigua, collected from the different geographical region of Punjab (Pakistan) province, was evaluated. Three concentrations of the NPV isolate, sub-lethal (1 × 104, 6 × 104 POB ml−1), lethal (3 × 105 POB ml−1), and chlorantraniliprole 0.01 μl l−1, were applied alone and in combination against the 2nd and 4th larval instars of both pest species. The lethal concentration of NPV + chlorantraniliprole exhibited synergistic interaction and caused high larval mortality against both instars, while in all other combinations, additive effect was observed. Moreover, NPV + chlorantraniliprole at lethal concentration exhibited decreased pupation, adult emergence, and egg eclosion. Conclusion The implications of using NPV alone and in combination with an insecticide are discussed briefly in this study.

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