Using thirty-one essential oils with different manufactured T-tube olfactometers, attraction and repellent efficacy were proved against ggot-mae-mi, Lycorma delicatula. Among tested essential oils, spearmint was selected to have attraction efficacy (94.1%; P<0.001). Spearmint was also showed attraction efficacy in 10 and 2.5 ul, but did not showed in 1 ul. GC analyzed chemical constituents of spearmint were tested with different concentations (10, 5, 2.5, 1 ul). Carvone were showed activity in 10 and 5 ul, but limonene did not showed the activity. When mixing two compounds were showed activity in 10, 5, 2.5 ul as 78.8, 73.5, and 69.7%, respectively. Lavender was selected to have repellent efficacy (86.7%; P<0.001). Lavender was also showed repellency in 10 and 2.5 ul, but did not showed in 1ul. GC analyzed chemical constituents of lavender were tested with different concentrations, results have the activity linalool and terpinen-4-ol in 10 and 5 ul, but linalyl acetate and caryophyllene oxide did not have the activity. Spearmint and lavender showing attraction and repellency, respectively, were keep in lure during 24 hr for penetration with different concentration(30, 20, 10 ul), and attached to the center of Fly catcher, fly sticky trap. The trap was set in the field that founded frequently the L. delicatula. The number of L. delicatula caught in the traps were counted after 5, 10, and 15 days. In attraction efficacy of 20 ul concentration wㄷre high attracted the insect(P<0.001). 30 ul concentration were also have the high attraction (P<0.01). We are now tested the control efficacy in grapevine orchard using these materials.

This study was performed to analyze the sugar contents from six kinds of plant and investigate their effect on the life span of ggot-mae-mi, Lycorma delicatula. Part of plants were methanol extracted from host plants such as Ailanthus altissima, Vitis vinifera and non-host plants such as Malus pumila, Pyrus calleryana, Hibiscus syriacus, and Pinus densiflora, and concentrated the water layer and then analyzed the sugar contents using HPLC. Ailanthus altissima existed high in sugar contents and followed by Fructose>Glucose, Vitis vinifera was analyzed by an order of Glucose>Fructose>Maltose>Sucrose>Rhamnose; Malus pumila was as Glucose>Fructose; Pyrus calleryana was as Glucose>Unknown>Fructose; Hibiscus syriacus was as Sucrose>Glucose; Pinus densiflora was as Fructose>Glucose>Sucrose. A parafilm bioassay was used to investigate the longevity of L. delicatula nymphs to the sugar contents. Nymphs of L. delicatula was lived as long as 13.1 days in 5% Sucrose solution, but lived as short as 6.0 days in 5% Glucose solution. When provided with only water, L. delicatula lived for 5.4 days. Life span to the each sugar contents were longer lived in an order of Sucrose>Fructose>Rhamnose>Maltose>Glucose. As investigated the life span of L. delicatula nymph according to the combination of sugar contents founded in original plants were lived longer in 5% sugar combination solution of Ailanthus altissima. Analyzed original sugar contents from Malus pumila, Pyrus calleryana, L. delicatula was lived as 7.8, and 7.1 days, respectively, comparing to the Hibiscus syriacus, and Pinus densiflora lived as 6.0, and 4.7 days, respectively. This result were judged that sugar contents affected on choosing the host plants.

This study was performed to compare the host preference, survivorship and feeding behavior using EPG against ggot-mae-mi, Lycorma delicatula against seven plants such as Ailanthus altissima, Vitis vinifera, Malus pumila, Pyrus calleryana, Hibiscus syriacus, and Pinus densiflora. In host preference. L. delicatula was most preferred the Ailanthus altissima, Vitis vinifera and was not preferred the other plants. Survival rate of 3rd Nymph was recorded from Ailanthus altissima, Vitis vinifera as 15.0, and 15.4 days, respectively, it showed longest period. However, Malus pumila, Pyrus calleryana, Hibiscus syriacus, were survived within 6 days and Pinus densiflora was within 5 days. Moreover, L. delicatula was survived within 2 days to the three kinds of fruits. Ecdysis rate from 3rd to 4th nymph also high from Ailanthus altissima, Vitis vinifera as 63.3, 63.0 % and the order was followed as Malus pumila(17.7%) > Pyrus calleryana(9.3%) > Hibiscus syriacus(7.8%) > Pinus densiflora(5.9%). Especially, ecdysis rate was recorded 0% to the three kinds of fruits. Feeding behavior was analyzed using EPG and compared the differences their waveform from seven kinds of plants and three kinds of fruits. Non-probing time was short in host plants, reversely, Phloem-feeding time was recorded longer in Ailanthus altissima, Vitis vinifera as 45.7 and 13.7 min, respectively. And other plants and fruits were not showed feeding behavior.