• Korean journal of applied entomology
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• v.30 no.4
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• pp.233-240
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• 1991

A female Brachymeria lasus (Walker) was exposed to one or four pupae of host Hyphantria cunea Drury for 20 minutes within a petri dish $(1.5\times9cm)$ to learn factors influencing the host discrimination by the parasitoid. It rejected the parasitized host with its rejection ratio 73.3% for the one pupal exposure vs 100% for the four pupal exposure scheme. The parasitoid could discriminate the parasitized host by its antennal drumming and ovipositor probing due to a pheromone-like external marking which is effective only for a certain peiod of time, and a host quality associated with the parasitoid development, respectively.

• The Korean Journal of Zoology
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• v.33 no.2
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• pp.166-174
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• 1990

Gallena mellonella L. was parasitized by the pupal parasitoid, Brachymerica lasus Walker in the laboratory. Haemolymph total protein and carbohydrate concentrations from the hosts parasitized by B. lasus decreased within 1st day following parasitization. However, haemolymph total free amino adds, glycine, proline, arginine, isoleucine, phenylalanie, leucine, valine, glutamk acid, histidine, serine, and tyrosine increased and free amino acids decreased were threonine, aspartic acid, methionine, cysteine, alanine, and lysine.

• Journal of Ecology and Environment
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• v.32 no.2
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• pp.75-81
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• 2009

The species composition of the parasitoid complex and the degree of parasitism by each species were analyzed for gypsy moth (Lymantria dispar) populations in the increasing phase. Total of 7,826 mid-late instar larvae and pupae were collected and reared from two collection sites in Gangwon Province, Korea. Two tachinid flies (Blepharipa schineri and Parasetigena silvestris), and the ichneumonid wasp (Coccygomimus disparis) were the most abundant parasitoids, in the order of decreasing importance. Other parasitoids occurring included Coteisa melanoscelus, Cotesia scheaferi, Glyptapanteles liparidis, Brachymeria lasus, and Exorista spp. The low incidence of the NPVirus is hypothesized to be an important factor in determining degree of parasitism rate by P. silvestris and B. schineri, and their relative dominance in the parasitoid complex.

• Korean Journal of Environmental Agriculture
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• v.4 no.2
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• pp.108-113
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• 1985

Aerial application tests with a biological insecticide (Thuricide$^{(R)}$) and two low toxicity insecticides, Diflubenzuron (Dimilin$^{(R)}$) and Triflumuron (Alsystin$^{(R)}$) were carried out against the fall webworm (Hyphantria cunea Drury). For experimental application by helicopter, dilutions of 30x and 45x Thuricide, 180x and 240x Alsystin, and 180x Dimilin were utilized. The solutions were applied at a rate of 30 liters per hectare. The results are as follows: 1) All treatments, Dimilin 25% wp, Thuricide wp, and Alsystin 25% wp, were found to very effec tive against fall webworm larvae. Percentages of mortality averaged between 93.9% and 97%. 2) No significant differences in percentages of larval kill were found between dilutions of Thuricide (30x and 45x) or Alsystin (180x and 240x). 3) Assessment of parasite densities in the treated areas 35 days after treatment indicated that percentages of reduction for all five species found, including Brachymeria lasus(Walker) (=obscurata [Walker]), were lower than for areas treated with the conventional insecticide Diplox$^{(R)}$ (trichlorfon) 25% wp. In particular, the percentage of reduction in Thuricide-treated areas was only 21% as compared with the untreated (control) areas. 4) Aerial applications of Dimilin were very effective and economical for control of the fall webworm by comparison with [aerial] applications of Thuricide.

• International Journal of Industrial Entomology and Biomaterials
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• v.6 no.2
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• pp.125-132
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• 2003

Uzi fly (Exorista bombycis Louis) is one of the major larval endo-parasitoid of silkworm (Bombyx mori). It causes extensive damage to sericulture industry. The application of synthetic organic pesticides has tremendous impact on minimizing pest population but their overuse and frequent misuse and high sensitivity towards the silkworms, has forced the entomologists to search for alternatives to chemical control, which is safe to silkworm, environment and farm workers. Biological control continues to offer exciting possibilities for the control of fly pest population. It is environmentally safe alternative to chemical control and offering a long-term protection. Several potential hymenopteran parasitoids have been screened. Among successful natural enemies, Nesolynx thymus, Trichomalopsis apanteloctena, Trichopria sp., Brachymeria lasus, Pediobius sp., Spalangia sp., Spilomicrus karnatakensis and Dhirhinus sp. are important. It is essential to predict accurately the efficacy of these natural enemies in a new habitat prior to its introduction. The important desirable attributes of these potential parasitoids viz., host searching capacity, specificity, power of increase and fitness and adaptability of the parasitoid in new environment has been recorded. Results of the host parasitoid interaction indicate that the aging of the host function as a factor that influence the host finding efficiency of the parasitoid. It is highly scored with 15-20 hrs old pupa of the host. However, aging of the parasitoid does not significantly affect it. The sex ratio is female biased which is advantageous from biological control point of view, Biological suppression methods involving conservation and utilization of natural enemies have been discussed in detail.