This study was conducted to determine the relationship of larval density of tobacco cutworm, Spodoptera ... , and the fruit damaged had a conspicuous hole on the surface or scar marks around the calyx. ... The leaf consumption rate increased greatly with larval development.
As a primary study on the economic injury level of A. tokionis larval populations in tobacco fields, ... The sampling efficiency of clover patch becomes higher when the plots did not have any green plants. ... patches) for the larval population and the regressions between loss and infested larval density The clover
Laboratory trials were conducted for control of onion maggot and tobacco cutworm with ento¬mogenous nematodes ... The tobacco cutworm, SpodoPtera litura was exposed to S. feltiae at concentration of 0,50,100,200 or ... Mortalities of the tobacco cutworm larvae decreased when the nematodes were sprayed on the kale leaves
planthopper, and the diamondback moth and 12 mM for the tobacco cutworm. ... Km value of the tobacco cutworm ChE was 1.15 mM and BuChE characteristics was observed, though further ... cutworm were considered satisfactory as enzyme sources in view of mass preparation, extraction efficiency
and developmental stages of tobacco cutworm. ... Pathogenicity of five effective strains against tobacco cutworm depends on nematode strain, concentration ... Five effective strains against tobacco cutworm, Spodoptera litura (Lepidoptera: Noctuidae), Steinernema
against the beet armyworm, Spodoprera exigua and the tobacco cutworm, Sp. litura that are normally infesting ... , and capsule size, but not on citric acid reaction time during capsule formation. ... Moisture content in the capsule was critical to the survival of the infective juveniles.
Damage and control of cutworms in the tobacco fields were studied during 1998~2000. ... It was estimated by surveys on cutworm damage that control measures should be taken for 9.0~10.2% of ... The damaging period and cutworm behavior suggested that the most effective control method would be the
developmentof the tobacco cutworm, Spodoptera litura Fabricius. ... However, egg duration at32C was shorter than that at 24C and 28C. ... This result was probably due to relativelyslower developmental rate at 24C compared to 28C and 32C.
longevity and oviposition of tobacco cutworm, Spodopteralitura Fabricius. ... Number of egg mass was 12.0, 6.7 and 11.3 at24"C, 28C and 32"C, respectively.4"C, 28C and 32"C, respectively.pectively ... Number of eggs per eggmass was 97.4 at 24C 155.8 at 28C and 104.7 at 32C.
The altered environments did not affect the cutworm in mortality, which was confirmed by recovery ratio ... This study was carried out to see what makes the 'dark grey cutworm', Agrotis tokionis Butler, inflict ... less damage in P.E. film-mulched tobacco fields than in nonmulched ones.
, when 3rd instar larva of tobacco cutworm was treated with insecticides of chlorpyrifos, ethofenprox ... on pupal duration, emergence, adult longevity and oviposition of tobacco cutworm, Spodoptera litura Fabricius ... Accordingly the pupal duration and oviposition of tobacco cutworm were affected at the insecticide treatment
cutworm, Spodoptera litura, when treated by a leaf-disk dipping method. ... The systemic larvicidal effect of RH 5849 was compared at cabbage and tobacco whole plant test. ... The values below 20 ppm(mg/kg soil) was lasted for 15 days in cabbage, 30 days in tobacco respectively
, diamond-back moth, tobacco cutworm and green peach aphid, and larvae of two-spotted spider mite to ... cutworm, whereas seedling+insect spray method for adults or third instars of brown planthoppers. ... leaf-dipping method for apterous green peach aphid adults, and third instars of diamond-back moth and tobacco
Supercooling points (SCP) and cold tolerance of the tobacco cutworm, Spodol~rera litura Fabricius. were ... Eggs showed the lowest SCP (-27C). Pupae and adults had the intermediate SCP(- 18C). ... The SCPs (- I0 to - 16C) of larvae increased with their ages.
두류의 품종별 담배거세미나방의 유충사육에 따른 용발육 및 성충수명에 미치는 영향을 조사하였다. 담배거세미나방의 용기간은 8.7~9.5얼로 강낭콤 및 동부에서 짧았으며, 두유콩, 새알콩 및 선화녹두에서 길었고, 암컷의 용기간이 수컷보다 약 1일 짧았다. 전용기간은 약 1..
cutworm inhibit in fields. ... is a significant factor in deciding insecticide efficacy because various developmental stages of the tobacco ... In the laboratory study, the toxicities of chlorpyrifos-methyl, chlorpyrifos, etofenprox, etofenprox+
Bacillus thuringiensis with selected high toxicities against tobacco cutworm, Spodoptera litura were ... (1.3×10⁷ cfu/㎖). ... a bipyramidal crystal types.
A nuclear polyhedrosis virus (NPV) of the tobacco cutworm, Spodoptera litura would be a promisible agent ... for the control of the insect. ... On the concentration of , median lethal times () were 7.3 days for the 3rd and 8.9 days for the 5th instar
The pest control effects of tobacco cutworm (Spodoptera litura) were compared with control (non sprayer ... shirking task in crop cultivation. ... and the conventional practices.
두류 품종별 잎특성에 따른 담배거세미나방 유충의 발육과 식엽량을 조사하였다.유충 기간은 검정콩 l호에서 11.5일로 가장 짧았으며, 대광땅콩에서 15.7일로 가장 길어어 두류 품종에 따라 현저한 차이가 있었다. 유충의 영기별 발육기간은 l령에서 3 .2~5.0일로 가장..