Biology and thermal requirements of Chrysoperla genanigra (Neuroptera: Chrysopidae) reared on Sitotroga cerealella (Lepidoptera: Gelechiidae) eggs (original) (raw)
Related papers
Journal of Pure and Applied Microbiology, 2016
The role of three different hosts viz., eggs of Corcyra cephalonica, brinjal aphids and mango mealy bugs on development, longevity, larval and pupal period of green lacewing (Chrysoperla carnea), was investigated in laboratory conditions (50 ± 1°C, 70 ± 5 % RH and photoperiod of L16: D8). In this study Chrysoperla was fed on Corcyra eggs, brinjal aphids and mango mealy bugs. Significant effects of host on larval duration, total developmental period, pupal duration, per cent larval survival and adult longevity of green lacewing were observed. The average larval period of C. carnea fed on was 14.40, 15.20 and 15.60, respectively. Pupal duration of 9.45, 10.02 and 9.77, respectively was recorded in same order of prey. Also the adult longevity of adults from eggs Corcyra, brinjal aphid and mango mealy bugs treatment was 25.40, 26.20 and 27.80 days for males and 31.40, 32.40 and 36.80 days for females. All the results showed that Total developmental period and per cent larval development suggested that eggs of C. cephalonica as better food for C. carnea.
A Study on effects of different hosts on biology of Chrysoperla carnea (Stephens) was carried out under laboratory conditions at 26±2°C and 65±5% R. H. indicated that the incubation period of eggs of C. carnea females feeding on different hosts as larvae was significantly different from each other. The biology of C. carnea was completed in 26 days on A. craccivora followed by A. gossypii (31 days) and Corcyra cephalonica (45 days). A single larva of C. carnea consumed A. gossypii and 97.33 eggs of Corcyra cephalonica followed by A. gossypii (80.00±2.65 nymphs/adults) and A. craccivora (64.33±0.67 nymphs/adults) per day. However, the all three larval instars of C. carnea consumed 369.00±6.11 eggs of C. cephalonica followed by A. gossypii (277.67±4.37 nymphs/adults) and A. craccivora (206.67±1.86 nymphs/adults) during whole larval period.
Effect of prey on predation, growth and biology of green lacewing (Chrysoperla zastrowi sillemi)
Indian Journal of Agricultural Sciences
The larvae of the polyphagous predator, green lacewing [Chrysoperla zastrowi sillemi (Esben-Petersen)] was reared on natural prey including cabbage aphid (Brevicoryne brassicae), bean aphid (Aphis craccivora), nymphs of okra jassid (Amrasca biguttula biguttula), eggs and neonate larvae of Spodoptera litura and eggs of Corcyra cephalonica to study the effect of prey regimes on the predation and the biology of the predator. The lacewing grub preyed significantly highest number of prey units (415.50 eggs/ grub) of C. cephalonica eggs which was significantly more than the S. litura eggs (250.60 eggs/ grub), A. biguttula biguttula (185.00 nymphs/ grub), B. brassicae (127.50 aphids/grub), A. craccivora (119.00 aphids/grub) and neonates of S.litura (62.25 larvae/grub). The larval duration varied from 7.50 to 15.235 days on different preys which was seven day less in the grubs reared on eggs than the grubs fed on insect as prey. Larval survival was significantly highest (97.82%) on C. cephalonica eggs. The pupal period varied from 7.50 days to 8.63 days. The grubs reared on eggs of C. cephalonica and S. litura showed longer pupal period. On insects as prey, the growth index (GI) of larvae was significantly less (5.56-8.58) compared to the larvae reared on egg-hosts. The weight of grubs preying on other hosts was 35-50% less compared to those reared on C. cephalonica eggs. Relative inadequacy of lepidopteran neonates and aphids except B. brassicae as prey for the young larvae adversely affected the larval survival, GI and adult emergence may be due to reduced nutritional support exerting adverse effect on growth and causing moulting distress.
2015
Insects are poikilothermes and hence environmental factors and primarily temperature can affect their biological activities and behavior. In this study thermal range preferred by Ooencyrtus fecundus Ferrier & Voegele was investigated by a device producing a thermal gradient from 16 to 47oC. Temperature of different parts of the arena was precisely recorded by eight thermometers entered the arena from marginal walls of the apparatus. Three entries were prepared in cold, middle and warm areas of the device. In order to exclude possible tendencies of the release point, experiment was done three times each from an entry. Twenty wasps were released each time and number of the parasitoids as well as current temperature of any part was recorded after 5, 15 and 30 minutes. The highest frequency of the wasp (89.25%) was occurred in a spectrum of 23.47-29.54oC while 46.66% of them were assembled in center of the arena where mean temperature was 26.03oC. Wasps' distribution was affected by...
2000
their increased use in pest management present applied entomologists and ecologists with formidable challenges. A response to these challenges requires reducing the cost of mass-rearing and manipulating natural enemies; improving the success rate and predictability of biological control procedures; and demonstrating the effectiveness, ecological benefits, and safety of biological control under commercial conditions. Given the above objectives, laboratories around the world are striving to improve the production and appropriate use of green lacewings in the genus Chrysoperla. Recent progress in crucial areas of research with this important group of predators illustrates significant lessons that can be applied to the integration of research and commercial development.
Influence of larval food consumption on the fecundity of the lacewing Chrysoperla carnea
Entomologia Experimentalis et Applicata, 1993
The effects of food consumption on larval growth and development and adult fecundity of the common green lacewing, Chrysoperla carnea (Stephens), were studied on two populations of larvae derived from either a laboratory colony or from field-collected adults. The number of eggs of the Mediterranean flour moth, Anagasta kuehniella (Zeller), provided to individual lacewing larvae was varied to produce three food-supply treatments: low, intermediate, and high. Food-supply was found to influence larval growth and development and adult fecundity. Lacewing larvae provided with an overabundance of moth eggs developed faster than larvae provided with fewer moth eggs than they could have consumed. Adult females that developed from the high feeding treatment had a substantially shorter preoviposition period, a later decline in egg deposition, and a significantly higher fecundity than adults arising from the other feeding classes. Unrestricted feeding by adult lacewings on an artificial diet did not compensate for prior low feeding regimes. The overall performance of the lacewings derived from the laboratory colony was substantially poorer than that of the lacewings derived from field-collected adults. This effect was accentuated when the larvae were given a low food-supply. This overall decrease in vigor is attributed to inbreeding of the laboratory culture over a one year period. These finds are relevant to mass rearing programs for this biological control agent.
Can larval lacewings Chrysoperla externa (Hagen): (Neuroptera, Chrysopidae) be reared on pollen?
Revista Brasileira de Entomologia, 2010
Can larval lacewings Chrysoperla externa (Hagen) (Neuroptera, Chrysopidae) be reared on pollen? The aim of this study was to verify the viability of exclusive use of elephant grass pollen, Pennisetum purpureum (Schum), to feed larvae of the lacewing Chrysoperla externa (Hagen, 1861). The insects were kept at 24ºC and the duration and survival rate of each instar and the larval and pupal phases were recorded. The diet provided complete development of the larvae. The average duration of the first and second instars was the same (6.9 days), while the third instar lasted an average of 10.0 days and the pupal phase 13.2 days. The average survival of the larvae was above 80% for the first, second and third instars, and 70.0% and 33.3% for the larval and pupal phase, respectively. These results indicate that the exclusive use of elephant grass pollen can provide complete development of the immature stages of this predator. KEYWORDS. Diet; green lacewing; mass rearing. RESUMO. Larvas de Chrysoperla externa (Hagen) (Neuroptera, Chrysopidae) podem ser criadas com pólen? O objetivo do presente estudo foi verificar a viabilidade do uso exclusivo de pólen de capim-elefante Pennisetum purpureum (Schum) como dieta para larvas de Chrysoperla externa (Hagen, 1861). Os insetos foram mantidos a 24ºC, avaliando-se a duração e a sobrevivência em cada instar e em todo o estágio larval e pupal. Verificou-se que a dieta proporcionou o desenvolvimento completo das larvas do crisopídeo, que apresentaram a mesma duração média para o primeiro e segundo ínstares (6,9 dias) e permaneceram 10,0 e 13,2 dias no terceiro instar e no estágio pupal, respectivamente. A sobrevivência média das larvas de C. externa foi superior a 80% para o primeiro, segundo e terceiro ínstares, e de 70,0% e 33,3% para o estágio larval e pupal, respectivamente. Verificou-se que o uso exclusivo de pólen de capim-elefante como alimento para larvas de C. externa proporcionou o completo desenvolvimento dos estágios imaturos do predador. PALAVRAS-CHAVE. Criação massal; crisopídeo; dieta.
Different host consumption by Chrysoperla carnea (Green lacewing) under laboratory conditions
2020
The study was carried out on different hosts at IPM laboratory Tandojam during 2018-2019. The duration of various life stages i.e., eggs, larvae and pupae on aphid, eggs of Angoumois grain moth and mealy bug were observed. The fecundity female, longevity of female were recorded on various hosts. The predatory behaviour of larvae of Chrysoperla Carnea was recorded daily by offering them a known number of aphids, eggs of Angoumois grain moth and mealy bug. The increase in the weight of larvae of C. carnea after consumption of food was daily recorded in 3 instar. The mean larval emergence from the eggs was observed as 16.4±1.60, 16.4±1.50 and 16.2±1.28 on Angoumois grain moth, cotton aphid and mealy bug respectively. The pupal period was 112.6±14 on Angoumois grain moth, cotton aphid and mealy bug respectively. The fecundity of female on three hosts comes out to be 1490.4±40.78, 1594.6±53.28, 1402.6±42.81 on Angoumois grain moth, cotton aphid and mealy bug respectively. The weight reco...