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The developmental biology of Mallada desjardinsi (Navas) and Chrysoperla congrua (Walker) on the American bollworm, Helicoverpa armigera and the cotton aphid, Aphis gossypii was studied in the laboratory at 28–32°C. Total larva! periods of M. desjardinsi and C. congrua on H. armigera eggs were 14.4 and 14.8 days respectively. However, when reared on A. gossypii larval periods of M. desjardinsi and C. congrua were 14.9 and 13.5 days respectively. When reared on H. armigera 52.9% and 25% respectively of third instars of M. desjardinsis and C. congrua sp. died before pupation. However, when reared on A. gossypii 82.6% and 46.9% respectively of third instars of M. desjardinsi and C. congrua died before pupation. Thus, H. armigera eggs and A. gossypii nymphs were both adequate but not optimal diets for chrysopid larval development. The number of prey consumed by M. desjardinsi and C. congrua increased with instar. Total larval consumption of H. armigera by M. desjardinsi and C. congrua was determined to be 135.5 and 169.8 eggs respectively. However, total larval consumption of A. gossypii by M. desjardinsi and C. congrua was found to be 189.0 and 171.8 nymphs respectively. Because of its longer larval period, and higher consumption of A. gossypii, M. desjardinsi would be better suited for use against A. gossypii than C. congrua. In contrast, C. congrua whose consumption of H. armigera was higher than that of M. desjardinsi although their larval periods were similar, would appear promising for control of H. armigera. 相似文献
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丽潜蝇姬小蜂研究概述 总被引：1，自引：0，他引：1
本文对丽潜蝇姬小蜂Neochrysocharis formosa的学名沿革、分布、寄主、行为和生态特性及其控制作用与保护利用的研究现状作了概述。 相似文献
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益蝽Picromerus lewisi Scott是一种重要的捕食性昆虫,为探究其控害潜能,在实验室条件下研究不同龄期的益蝽对粘虫的捕食能力。选择饥饿24 h的3、4、5龄益蝽若虫和成虫对不同密度的3龄粘虫进行捕食量测定试验,试验结果为3、4、5龄益蝽若虫和成虫的日平均捕食量分别为3.33、4.23、8.00和6.50头,每个龄期的捕食功能反应都符合HollingⅡ圆盘方程,其攻击率分别为1.036、0.742、1.445和1.422,处理猎物的时间分别为0.313、0.158、0.112和0.135 d;试验中发现益蝽偏食活猎物。结果表明利用益蝽进行生物防治时,选择5龄若虫,控害效果最好。 相似文献
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Agrotis ipsilon (Hufnagel) (Lepidoptera: Noctuidae) is a cosmopolitan species that feeds on numerous cultivated plants and herbaceaus plants. Agrotis ipsilon causes significant economic losses in various agricultural products, especially in indisturial plants and vegetables in Turkey and worldwide. In this study, the effects on the biology and reproductive potential of lettuce (Lactuca sativa L., Asteraceae), maize (Zea mays L., Poaceae), sugarbeet (Beta vulgaris var. saccharifera Alef.,Amaranthaceae) and potato (Solanum tuberosum L., Solanaceae) which are essential host plants of A. ipsilon were investigated under climatized conditions of 28?±?1 °C, 60%?±?10 r.h., and 16 h daily artificial light. The data obtained were analyzed by using an age-stage two-sex life table. Agrotis ipsilon had five larval stages fed on lettuce, whereas seven larval stages were fed on other host plants. Agrotis ipsilon showed the best development and reproduction on lettuce, followed by sugar beet. When A. ipsilon is reared on lettuce the intrinsic rate of increase (r?=?0.1237 d?1), finite rate of increase (λ?=?1.1317 d?1) and net reproductive rate (R0?=?403.06 offspring/individual) were found higher and the mean generation times (T?=?48.51 d) is shorter than those in other host plants. According to these results, A. ipsilon can cause the most damage to lettuce among studied plants.
相似文献6.
为明确胡瓜新小绥螨Neoseiulus cucumeris Oudermans对烟粉虱Bemisia tabaci Gennadius的控害潜能,在（26±1）℃、相对湿度65%±5%、光周期16L：8D条件下,研究了各螨态胡瓜新小绥螨对不同发育阶段烟粉虱的捕食作用。结果表明,胡瓜新小绥螨幼螨期较短,不取食烟粉虱,其他不同螨态的胡瓜新小绥螨可捕食除4龄若虫和成虫以外的其他各虫态的烟粉虱,捕食功能反应符合HollingⅡ型;胡瓜新小绥螨雌成螨对烟粉虱卵的日捕食量最大（8.5粒/雌）,对烟粉虱3龄若虫的日捕食量最小（2.1头/雌）;雌成螨对烟粉虱卵具有较高的瞬间攻击率（0.038）和寻找效应（0.025）。研究表明,胡瓜新小绥螨对烟粉虱卵及低龄若虫的捕食能力较强,是烟粉虱发生初期的有效天敌。 相似文献
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圆果大赤螨的初步研究 总被引：2，自引：0，他引：2
圆果大赤螨一生的发育经卵，前幼螨，幼螨，第一，二，三若螨和成螨７个阶段，在幼螨和各若螨的后期都有一个静息期。成螨能进行孤雌生殖，死后的遗腹卵也能孵化。该螨在广州地区年发生２－３代，盛发期分别在３－４月，１０－１１月和１２－１月。冬季继续发育，没有越冬现象，但在夏季旬平均气温超过２８℃时发育停止。该螨除捕食蚜虫，蚧壳虫和叶螨外，还捕食柑桔木虱和柑桔锈螨。对桔全爪螨，柑桔锈螨，柑桔木虱和绣线菊蚜等有害 相似文献
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烟蚜的新天敌—奇臀花金龟 总被引：1，自引：0，他引：1
烟蚜Myzus persicae(Sulzer)是烟草上的主要害虫之一,我国各产烟省(区)广泛分布。其发生数量大,危害时间长,防治较困难。1999年5月下旬-6月中旬,在云南省宜良县九乡烟田调查,烟蚜的捕食性天敌除食蚜蝇、瓢虫、草蛉类外,还发现了一种新天敌一奇臀花金龟Campsiura mirabilis(Faldermann)。 相似文献
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Malkie Spodek Yair Ben-Dov Alex Protasov Carlos Jorge Carvalho Zvi Mendel 《Phytoparasitica》2014,42(3):377-379
The presence of the Opuntia cochineal scale insect, Dactylopius opuntiae (Cockerell) (Hemiptera: Coccoidea: Dactylopiidae) is reported for the first time from Israel. It was collected off the Indian-fig prickly-pear, Opuntia ficus-indica (L.) Miller (Cactaceae) in the Hula Valley of the Upper Galilee. 相似文献
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R Ergens 《Folia parasitologica》1992,39(4):391-394
Gyrodactylus bohemicus sp. n (Gyrodactylidae: Monogenea) is described from the fins, skin and gill filaments of Oncorhynchus mykiss (Walbaum) and Salvelinus fontinalis (Mitchill) (Clupeiformes: Salmonidae) from a trout farm in Czechoslovakia. G. bohemicus sp. n. is most closely related to G. thymalli Zitnan, 1960 and G. magnus Konovalov, 1967 in the shape of the anchors, the ventral and the dorsal bar, but can be distinguished from both these species by the shape of the marginal hook proper. 相似文献
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Køie M 《Folia parasitologica》2001,48(4):304-310
Mature specimens of the nematode Dichelyne (Cucullanellus) minutus (Rudolphi, 1819) (Ascaridida, Cucullanidae, Seuratoidea) were obtained from the intestine of flounder Platichthys flesus (L.) caught in the Oresund, Denmark. Plaice Pleuronectes platessa L. and common goby Pomatoschistus microps (Kr?yer) also harbour this species. The eggs embryonate on the seabottom. Larvae about 440 microm long, and believed to be in their third stage, hatch from the eggs. These larvae are not directly infective to flounders or gobies. The polychaete Nereis diversicolor O.F. Muller acts as obligatory intermediate host. Experimental infections showed that larvae >600 microm long and provided with achitinous tooth survived in flounder and common goby. The third-stage larvae moult to fourth-stage larvae in the fish gut wall. Mature worms occur in the lumen of the anterior part of the intestine. All developmental stages may be transferred from one flounder to another; thus the flounder may acquire the parasite also by devouring infected gobies. 相似文献
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Among several factors that influence silk yield, insect and non-insect pests form an important component. Of the insects that attack silkworm, the most important are the tachinid parasites which are commonly known as ujiflies. There are at least four species of ujifly that attack silkworms viz., Japanese ujifly, Crossocosmia sericariae (Rondani); Hime ujifly, Ctenophorocera pavida (Meigen); Tasar ujifly, Blepharipa zebina (Walker) and the Indian ujifly, Exorista bombycis (Louis). This review discusses distribution and history, taxonomy and bio-ecology of the ujifly. Among the different management practices used, cultural methods such as exclusion, i.e. fitting fly-proof wire mesh screens to the windows, ventilators and doors of rearing rooms and securing fly proof nylon net to individual trays, are found to be the most eco-friendly and economical. Other practices such as the use of hyper parasitoids, chemicals, chemosterilants, quarantine measures and lastly the integrated management practices have also been presented. 相似文献
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Journal of Plant Diseases and Protection - Developmental time, longevity and fecundity of Delphastus catalinae (Horn), a predator of Bemisia tabaci (Genn.), were evaluated under laboratory... 相似文献
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(续上期 )4 鼠李马铃薯蚜ＡｐｈｉｓｎａｓｔｕｒｔｉｉＫａｌｔｅｎｂａｃｈ ,1 843(图 4)4.1 英文名 (ｃｏｍｍｏｎｎａｍｅ) :Ｂｕｃｋｔｈｏｒｎ -ＰｏｔａｔｏＡｐｈｉｄ4.2 异名[7] :ＡｐｈｉｓａｂｂｒｅｖｉａｔａＰａｔｃｈ ,1 91 2ＡｐｈｉｓｂｕｌｌｅｒｉＲｏｂｉｎｓｏｎ＆Ｒｏ ｊａｎａｖｏｎｇｓｅ,1 9764.3 形态特征简述[8]4.3.1 无翅孤雌蚜 :活体黄色、黄绿色或浅绿色 ;头部常褐色 ;触角端部、胫节端部、跗节、腹管端部暗色 ;尾片淡色。体长 0 9～ 2 4ｍｍ。背板膜质 ,表皮无网纹。腹部节Ⅰ和Ⅶ有缘瘤 ,节Ⅶ缘瘤直… 相似文献
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在室内测定了纵卷叶螟绒茧蜂Apanteles cypris对稻纵卷叶螟Cnaphalocrocis medinalis幼虫的功能反应和寻找效应。结果表明,纵卷叶螟绒茧蜂对稻纵卷叶螟幼虫的功能反应可用Michaelis-Menten-Ⅱ型功能反应模型Na=AN0/(F+N0)拟合,一头纵卷叶螟绒茧蜂雌蜂在24h内对稻纵卷叶螟幼虫的寄生潜能A为10.7528头,寄主半饱和密度F为14.3864头。纵卷叶螟绒茧蜂的寄生功能反应有较强的种内干扰作用,即随自身密度的增加,寄生数量逐渐减少。Hassell模型E=QP-m能较好地反映纵卷叶螟绒茧蜂的寻找效应与其自身密度的关系,拟合结果为:E=0.2956P-0.5890。 相似文献
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Skoracki M 《Folia parasitologica》2008,55(2):155-158
Cuculisyringophilus crotophaginus gen. n. et sp. n. is described from the guira cuckoo Guira guira (Gmelin) from Paraguay and also was collected from the groove-billed ani Crotophaga sulcirostris Swainson from Colombia and Mexico. This new genus is closely related to Neoaulobia Fain, Bochkov et Mironov, 2000 but is distinguished by the following characters: propodosomal setae sce are situated distinctly anterior to level of setae d1, leg setae vs'II are absent, apodemes I are divergent. 相似文献