A history of name changes in two fulgorid species –Lycorma delicatula and Limois emelianovi– is reviewed. Lycorma delicatula was once mistakenly reported to occur in Korea. Now, it has suddenly become common in western Korea, creating the suspicion that it has recently arrived from China and settled in Korea. A brief morphological and biological description of L. delicatula is provided, and its original Korean name, “ggot‐mae‐mi”, is revalidated. Limois emelianovi, sometimes considered a synonym of emeljanovi, is the correct name for this species, as emeljanovi is simply another transliteration of the personal name Emelianov, Emeljanov or Emel’yanov. The name emelianovi stands correct based on the International Code of Zoological Nomenclature code 32.5.1, because there is no internal evidence of an inadvertent error, and an incorrect transliteration is not considered an inadvertent error. The cytochrome oxidase I (COI) barcoding regions of both species were sequenced and compared for future reference.

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This study was conducted with CB1, CB3, CB5, CB8 and C12 cotton varieties to determine the role of leaf trichomes and meteorological factors on the abundances of aphid and jassid. The mean population of the pests on the tested varieties differed significantly and showed negative correlation with trichomes. The pests were most abundant on CB12, and each variety revealed significantly higher population of jassid than that of aphid. Both the pests built up their population in the juvenile stage of the plants (73 days after sowing) and continued until harvesting. Aphid population was the highest on CB12 in the first week of November, whereas maximum abundance of jassid was on CB12 in the third week of December. Weather parameters were found insignificant on aphid abundance, but jassid population on the varieties was correlated with maximum and minimum temperatures, relative humidity and rainfall. Multiple regression equation based on weather parameters exerted 8.8 -43.2% and 54.4 -77.7% role on population build up of aphid and jassid, respectively. Maximum temperature had the most important effect which contributed 61.2% population fluctuation of jassid on CB12.

The body mass of Bombus terrestris individuals is an important trait for their behavioural performance and colony organization. In this study, colonies were reared under four different photoperiodic regimes, viz. 0 : 24, 8 : 16, 16 : 8 and 24 : 0 h light : darkness (L : D) at 28°C and 50% relative humidity. The changes in body mass were observed at the stages of larvae, pupae and on the day of adult eclosion. Both the wet and dry mass of sexuals gradually decreased with increasing day length. The relationship between body mass and copulation duration revealed that copulation duration was negatively correlated with male body mass, but positively with queen body mass. Higher number of matings by males resulted in significantly higher duration of copulation.

The n-hexane extracts of the weeds 'bhatpata' Clerodendrum viscosum, 'kashiature' Cassia tora, 'dhakishak' Dryoptris filix-max, 'bonmorich' Croton bonpalandianum and 'ghagra' Xanthium strumarium were used to evaluate their effectiveness for suppressing pulse beetle, Callosobruchus chinensis reared on mung bean Vigna radiata grains. The investigations were done with 1, 2 and 4% n-hexane extracts of the weeds and an untreated control. The weed extracts exhibited considerable effectiveness which varied with weed species, concentrations and exposure durations. The higher concentrations showed the higher rate of insect mortality, fecundity, adult emergence inhibition, and grain protection. The LC50 values of the extracts ranged from 5.3 to 7.8, 4.7 to 6.5 and 4.1 to 6.0 g/100 ml at 24, 48 and 72 hours after treatment, respectively. The fecundity inhibition varied from 31.7 to 78.7%, adult emergence inhibition from 33.8 to 81.1%, and grain damage inhibition from 10.3 to 60.1% when 'bhatpata' with concentration of 1 g/100 ml and 'ghagra' with concentration of 4g/100 ml were applied, respectively. Among the tested weeds, ghagra (4g/100 ml) showed better efficacy against C. chinensis compared to other tested extracts and may be suggested to control pulse beetle and protection of mung bean grains.