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1.
A. Niccoli T. Panzavolta L. Marziali G. Sabbatini Peverieri G. Tellini Florenzano R. Tiberi 《Phytoparasitica》2008,36(4):313-321
In a young mixed pine plantation (Pinus nigra andP. pinea) in central Italy, the influence of the pine needle monoterpenes (R)-(+)-limonene, (S)-(−)-limonene and (1S)-(−)-β-pinene on the oviposition activity of the pine processionary moth,Thaumetopoea pityocampa (Denis et Schiffermüller), was assessed. Two application methods were compared: spraying the trees with the substances emulsified
with water, and setting up polyethylene dispensers from which the monoterpenes evaporated. During the moth’s flight period
weekly treatments (at 500 mg of monoterpene /l water) were carried out and the evaporation from the polyethylene dispensers (each with 5 g of a single monoterpene) was
checked on each occasion by weighing the dispensers. The GLM analysis did not uncover any difference between the methods of
application or between the pine species.T. pityocampa laid a significantly (P=0.01) lower number of egg masses on the trees treated with (1S)-(−)-β-pinene than on those treated with the other substances and on the control trees. A ∼45% reduction in egg mass number was
obtained on the pines treated with (1S)-(−)-β-pinene, independent of the level of infestation, method of application or pine species. (R)-(+)-limonene and (S)-(−)-limonene
were not effective.
http://www.phytoparasitica.org posting July 29, 2008. 相似文献
2.
A study was carried out at the Natural Park of Montesinho, NE Portugal, in order to evaluate the effect of different pine
species (Pinus pinaster Ait.,P. nigra Arn. andP. sylvestris L.) onThaumetopoea pityocampa populations. The structure of the egg batches, the impact of the egg parasitoids on natural mortality of the pest and the
species of parasitoids present, as well as their emergence dynamics, were analyzed. The length of the egg batches varied among
pine species with the longest ones onP. nigra. The mean number of eggs per batch differed betweenP. sylvestris and the two other hosts studied, with fewer eggs per batch on the first. No differences were found in the size of eggs among
pine species. The egg mortality varied between 25.8% and 33.0%, with no differences among hosts. Parasitism was the main cause
of death.Baryscapus servadeii (Mercet.) was the most abundant parasitoid species, followed byOoencyrtus pityocampae (Dom.) andTrichogramma embryophagum Htg.B. servadeii dominated in the egg batches collected fromP. pinaster andP. nigra, whereasO. pityocampae was most frequent onP. sylvestris. The emergence ofB. servadeii started in the middle of March and continued until August, with the emergence peak at the end of May. The emergence ofO. pityocampae started at the end of April and continued throughout September, with maximum values in June.
http://www.phytoparasitica.org posting Sept. 20, 2006. 相似文献
3.
Studies were performed on 25 egg batches ofThaumetopoea pityocampa (Den. & Schiff.) collected onPinus pinaster Ait. on 29. XI. 1995, in the Atlas Mountains of Morocco near Marrakech at 1400-1800 m above sea level. All the egg masses
had been deposited in the autumn of 1995 and were exposed to the parasitoids throughout the developmental period of the host.
In 1996, the egg batches, kept singly in test tubes, were observed almost daily. Emerged parasitoids were recorded and separated.
The final analyses were made in November 1996 based on the meconia and remains of the emerged or the dead parasitoids in the
eggs. In all cases, oviposition occurred from the base to the tip of the needles, distances varying up to 62 mm from the base.
The mean number of eggs per batch was 175 (range 34-245), the number of egg-rows varied between 6 and 11, and a 1-cm egg-row
contained a mean of 9 eggs. Caterpillars hatched from 72. 7% of the eggs; total mortality of the eggs was thus 27. 3%. The
impact of egg parasitoids was 21. 4%. Most of the parasitized eggs were attacked byBaryscapus servadeii (Dom.) followed byOoencyrtus pityocampae (Mercet). Males (1. 5%) were found only in B. servadeii. The emergence rate ofO. pityocampae was much higher in the year of host oviposition than in the following year. B. servadeii emerged in equal numbers before
and after hibernation, and in the subsequent year in equal numbers in spring and autumn. The high rate of emergence ofB. servadeii in April-May is discussed in relation to the embryonic development ofThaumetopoea bonjeani (Powel) until the end of winter, as an alternative host ofB. servadeii in the Atlas region. 相似文献
4.
Differences in constitutive and inducible defences in pine species determining susceptibility to pinewood nematode 
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下载免费PDF全文 C. S. Pimentel E. V. Gonçalves P. N. Firmino T. Calvão L. Fonseca I. Abrantes O. Correia C. Máguas 《Plant pathology》2017,66(1):131-139
The pinewood nematode, Bursaphelenchus xylophilus, originating from North America (NA), is a major invasive pine pest in Eurasia. It was first detected in Portugal in 1999 associated with maritime pine, Pinus pinaster, and has been differently affecting the main local pine species, P. pinaster and P. pinea. Field studies and direct inoculation experiments in Pinus spp. seedlings, under controlled conditions, were performed to assess whether the differences in constitutive and inducible defences are determining the different susceptibility of pine host species to B. xylophilus. Host co‐evolution with the pathogen was also assessed, including the NA P. radiata, widely used in forestry in the northeast of the Iberian peninsula. Pine mortality in the field was positively related with the abundance of B. xylophilus, and concentration of phenolics and condensed tannins in pines. In the greenhouse assay, seedling tissues were analysed for constitutive investment in defences, as well as the potential inducibility of those defences as driven by B. xylophilus inoculation. Slower growing P. pinea presented higher levels of constitutive defences than faster growing P. pinaster, with only P. pinaster being affected by B. xylophilus. Furthermore, co‐evolution with the pathogen is important, with the fast‐growing NA P. radiata presenting an inducible and effective response to B. xylophilus. Results point to the importance of integrating data on pine life history traits, including growth rate, and production of constitutive and inducible defences, into predictive models for this invasive forest pest. 相似文献
5.
Information is presented on new occurrences of two homopteran pests,Matsucoccus josephi Bodenheimer et Harpaz (Matsucoccidae) andPineus pini (Macquart) (Adelgidae), in Israel, Jordan and southern Lebanon.M. josephi occurs in Israel in almost all natural relicts of Aleppo pine (Pinus halepensis). It infests all plantations of Aleppo pine, brutia pine (Pinus brutia ssp.brutia) and Eldar pine (P. brutia ssp.eldarica) north of 31°12′ lat. N. Heavy damage has been observed in the Judean Foothills, Judean Mts. and northern Samaria.M. josephi and its specific predator,Elatophilus hebraicus Pericart (Hemiptera: Anthocoridae), are recorded for the first time in Jordan and southern Lebanon. The scale was found in
all visited Aleppo pine and brutia pine stands in Jordan and in natural and planted brutia pine in southeastern Lebanon. Damage
byM. josephi in Jordan was observed only in young plantations of Aleppo pine; in Lebanon no signs of injury were recorded.P. pini was found for the first time in Jordan, where it causes severe damage to young stands of Aleppo pine and stone pine (Pinus pinea).
Contribution from the Agricultural Research Organization. No. 1225-E, 1993 series. 相似文献
6.
J. Amaral G. Pinto J. A. Flores-Pacheco J. J. Díez-Casero A. Cerqueira P. Monteiro A. Gómez-Cadenas A. Alves J. Martín-García 《Plant pathology》2019,68(9):1645-1653
Pine pitch canker (PPC), caused by Fusarium circinatum, affects Pinus species worldwide. Although no effective solutions have yet been found to control it, there is a growing interest in using biological control agents (BCA) such as Trichoderma to avoid the application of chemical-based products. Using species with an increasing level of susceptibility to PPC (Pinus pinea, Pinus pinaster and Pinus radiata), this study aimed to evaluate the effect of Trichoderma viride pre-inoculation on disease development, assessing several physiological and hormonal parameters. A 2-week period elapsed between T. viride and F. circinatum inoculation. Sampling for each species was performed independently when at least 50% of the plants of one of the inoculated groups developed disease symptoms. Fusarium circinatum infection reduced water status and photosynthesis, but increased proline, abscisic acid and jasmonic acid concentrations in plants of P. radiata and P. pinaster with symptoms; while in P. pinea water relations were maintained and anthocyanin accumulation occurred in the presence of F. circinatum. In P. radiata, T. viride pre-inoculation accelerated disease progression, with some PPC-induced responses augmented (decreased water potential and photosynthesis; increased substomatal CO2 concentration) and novel changes not found in seedlings inoculated exclusively with F. circinatum (increased electrolyte leakage and salicylic acid; decreased relative water content). This suggests that T. viride may be initially recognized as an invading organism, subverting the plant defence mechanisms for successful root colonization. If seedlings are not allowed to recover from this state, pathogen infection may thus be facilitated, highlighting the importance of application timing in BCA strategies. 相似文献
7.
J. Martín-García R. Zas A. Solla S. Woodward J. Hantula E. J. Vainio M. Mullett C. Morales-Rodríguez A. Vannini P. Martínez-Álvarez G. Pinto A. Alves J. Amaral M. J. Wingfield G. Fourie E. T. Steenkamp R. Ahumada B. Šerá A. V. Sanz-Ros R. Raposo M. Elvira-Recuenco E. Iturritxa T. R. Gordon J. J. Diez 《Plant pathology》2019,68(5):843-860
Fusarium circinatum is a highly virulent invasive pathogen that causes the disease commonly known as pine pitch canker (PPC). On mature trees, the most common symptoms of PPC include resin bleeding, resinous cankers, wilting of needles and dieback. In nurseries the main symptoms are yellowish needles, and wilting of foliage and shoots. PPC is considered one of the most important diseases of conifers globally and at least 60 species of Pinus along with Pseudotsuga menziesii are known to be susceptible. Quarantine regulations are crucial to minimize the risk of new introductions into disease-free countries. However, if these measures fail, implementation of environmentally friendly control methods is currently encouraged in an integrated management approach that minimizes the use of chemicals in forests. This review therefore summarizes current knowledge of biological control using endophytic fungi, bacteria and viruses, and other environmentally friendly methods to control PPC, including thermotherapy, natural products with fungicidal effects, promoters of innate host resistance mechanisms and breeding for resistance. Key research gaps to be addressed for improvement of effective management of this disease are discussed. 相似文献
8.
Yasuhiro Mori Fumihiko Miyahara Yuji Tsutsumi Ryuichiro Kondo 《European journal of plant pathology / European Foundation for Plant Pathology》2008,122(4):529-538
To study the relationship between resistance to pine wilt disease and the migration or proliferation of pine wood nematodes
(PWN) (Bursaphelenchus xylophilus), we conducted experiments using clonally-propagated Japanese black pines (Pinus thunbergii) with pre-evaluated individual resistance levels. Bark including the cortical resin canals—one of the main migration pathways
of PWN—was removed by girdling, but neither the migration of PWN nor symptom development of pine wilt disease were inhibited
by this treatment in non-resistant clones. Histological observations showed no significant differences in the lumen area or
the number of cortical- and xylem- axial resin canals between resistant and susceptible clone groups from a half-sib family.
A bioassay using methanol extracts from resistant and susceptible clones showed that extracts from both clones showed similar
attractant effects to PWN, but neither had repellent effects. The resistant clones were multi-inoculated with PWN into three
split points to mimic migration in the stem. The proportion of damaged plants was not significantly different from that in
single-inoculated plants (control). In this experiment, the number of PWN detected from partially-damaged plants was much
higher than that from non-damaged plants. An inoculation test using stem cuttings showed that the population of PWN increased
in susceptible cuttings at 1–20 days after inoculation (dai), while it remained unchanged or gradually decreased in resistant
cuttings. These findings suggested that the factors contributing to resistance were associated with inhibiting the proliferation
of PWN, rather than inhibiting their migration. 相似文献
9.
Studies were carried out on the egg material ofTraumatocampa ispartaensis Doganlar & Avcı (Lep.: Notodontidae) collected onCedrus libani A. Rich. A total of 95 egg-batches were sampled over two annual generations ofTr. ispartaensis. The number of eggs in each egg-batch varied between 39 and 245 and the length of the batches varied between 7 and 36 mm.
The mean number of eggs per batch was found to be 119 and 122 in 1999 and 2000, respectively. Based on field data the oviposition
period continued from mid August to mid September. The mean hatching rate of the host was found to be 85.8% and 88.9%, whereas
the impact of egg parasitoids accounted for 11.3% and 7.4%, respectively in the 2 years.Ooencyrtus pityocampae (Mercet) was observed as the most abundant egg parasitoid, followed byOoencyrtus sp. nearmasii (Mercet) andTrichogramma brassicae Bezdenko. Based on the emergence dynamics of the egg parasitoids in the laboratory, it seems thatO. pityocampae emerged mainly in June whereasO. sp. nearmasii andT. brassicae emerged mainly in May.
http://www.phytoparasitica.org posting Feb. 3, 2003. 相似文献
10.
为明确玉米和甘蔗间作对亚洲玉米螟产卵行为的影响,在尼龙网室研究了亚洲玉米螟在玉米和甘蔗不同种植模式下的产卵时间、产卵部位及产卵量的差异。结果表明,不同种植模式下亚洲玉米螟均于23∶00开始产卵,02∶00~03∶00达产卵高峰。单作甘蔗、单作玉米和间作甘蔗叶背的玉米螟卵块和卵粒数均高于叶面,而间作玉米叶背与叶面的玉米螟卵块数无显著差异,叶背的卵粒数高于叶面。单作玉米叶脉的玉米螟卵块和卵粒数均显著高于叶缘;间作玉米和单作甘蔗叶脉与叶缘卵块数间无差异,但叶脉处卵粒数高于叶缘,间作甘蔗叶脉的卵块数高于叶缘,叶缘卵粒数高于叶脉。单作甘蔗叶背的亚洲玉米螟卵块主要分布在距叶鞘69.14 cm处,而叶面的卵块主要分布在距叶鞘21.09 cm处;间作甘蔗叶背和叶面卵块分布于距叶鞘35.17 cm和12.34 cm处,二者差异显著。单作玉米上亚洲玉米螟卵块仅分布于叶背沿叶脉远离叶鞘处,而间作玉米叶背和叶面卵块分布于近叶鞘。表明玉米和甘蔗间作对亚洲玉米螟雌蛾产卵选择性具有明显的影响。 相似文献
11.
吉林省不同地区亚洲玉米螟发生世代的变化 总被引：3，自引：1，他引：2
为明确吉林省不同地区亚洲玉米螟发生世代的变化,对吉林省东部、中部和西部3个生态区28个县(市)的亚洲玉米螟成虫产卵时期、幼虫发育和化蛹等情况进行了系统调查。结果显示,东部生态区大部分地区亚洲玉米螟只有1个落卵高峰期,未发现第1代幼虫化蛹,仍为1代发生区,而在伊通县和集安市有部分幼虫化蛹,已由1代发生区变为1代为主兼1.5代发生区;中部生态区大部分地区有2个落卵高峰期,未发现第2代幼虫化蛹,已由1.5代发生区变为完全2代发生区,而在双辽市和梨树县出现第3代低龄幼虫,已变为2代为主兼2.5代发生区;西部生态区大部分地区有2个落卵高峰期,未发现第2代幼虫化蛹,仍为2代发生区,而在通榆县出现第3代低龄幼虫,已由2代发生区变为2代为主兼2.5代发生区。表明随着全球气候变暖,吉林省亚洲玉米螟的世代发生数有增加的趋势。 相似文献
12.
M. Bendel F. Kienast H. Bugmann D. Rigling 《European journal of plant pathology / European Foundation for Plant Pathology》2006,116(2):85-93
Various disturbance factors on different spatial scales can lead to the creation of canopy gaps in forest ecosystems. In this study, we investigated the role of root rot fungi in the formation of canopy gaps in the Swiss National Park in the Central Alps. Dying or recently dead mountain pine (Pinus
mugo subsp. uncinata trees (n = 172) and saplings (n = 192) from 42 canopy gaps were assessed for Armillaria and Annosum root rot. Heterobasidion annosum s.str. proved to be the dominant pathogen and was isolated from 49% of the trees and 64% of the saplings. Armillaria was found on 13% of the trees and 20% of the saplings. Three Armillaria species, A. borealis, A. cepistipes, and A. ostoyae, were identified. Armillaria
ostoyae was the most frequent species, accounting for 72% of all Armillaria isolates. A total of 31 (74%) gaps were associated with H. annosum, and six (14%) with A. ostoyae. The remaining gaps were either associated with both pathogens (7%) or with other, unknown, factors (5%). Our findings suggest that the two pathogenic fungi, H. annosum s.str. and A. ostoyae, are the main reason for the large-scale mortality of mountain pines and the creation of canopy gaps in high elevation forests of the Swiss National Park. 相似文献
13.
为筛选出新型的高效松材线虫Bursaphelenchus xylophilus防治药剂,采用浸渍法室内测定了氯氟氰虫酰胺、阿维菌素、甲维盐、灭多威、特丁硫磷、甲基异柳磷和吡虫啉7种药剂对松材线虫的毒杀作用和对其繁殖能力的影响,采用高效液相色谱仪测定氯氟氰虫酰胺在马尾松体内的输导分布,并在林间开展树干注射氯氟氰虫酰胺抗松材线虫病试验。结果表明,7种药剂中氯氟氰虫酰胺对松材线虫的毒力最强,LC_(50)为0.019 mg/L,阿维菌素和甲维盐次之,LC_(50)分别为0.0213 mg/L和0.0214 mg/L。氯氟氰虫酰胺树干注射3个月内能迅速从马尾松基部传导至树梢顶部,树干边材东、南面的药剂含量显著高于西、北面,且树干不同高度的氯氟氰虫酰胺含量均高于其LC50;氯氟氰虫酰胺制剂在林间注干后,对人工接种病原松材线虫松树的防治效果为73.33%,自然感染松材线虫病松树的死亡率降至2.00%,而对照试验中人工接种松材线虫松树和自然感染松材线虫病松树的死亡率分别为93.33%和19.67%。表明氯氟氰虫酰胺制剂能有效预防松树个体的松材线虫病发生与为害,可以推广使用。 相似文献
14.
J. Sánchez J. Sánchez-Cara E. Gallego 《European journal of plant pathology / European Foundation for Plant Pathology》2000,106(3):209-214
Ten types of plant baits were tested in the laboratory to assess their capacity to detect pathogenic Pythium species. These were orange tree leaves, tomato leaves, pepper leaves, geranium leaves, Bermuda grass leaves, pine needles, immature carnation petals, hemp-seed cotyledons, pepper and cucumber fruits. The Pythium spp. tested were P. aphanidermatum, P. irregulare and Pythium group F from hydroponic market garden crops in the Poniente region of Almería (south-east Spain). The test consisted of observing the velocity at which five baits were colonized and the day of colonization of the first bait. Results indicated that the slowest baits to be infected were immature carnation petals and pine needles. These two, together with Bermuda grass leaves, were also the baits infected in lowest number, such that practically no further infection was produced in the baits after the fifth day of contact with the inoculated water. The other plant baits tested were equally suitable for detection of Pythium spp. over the first two days, although only orange leaves and hemp-seed cotyledons were infected on the first day. 相似文献
15.
P. F. Roversi W. B. Strong V. Caleca M. Maltese G. Sabbatini Peverieri L. Marianelli L. Marziali A. Strangi 《EPPO Bulletin》2011,41(1):72-75
Leptoglossus occidentalis (Heteroptera, Coreidae), a Nearctic species, was accidentally introduced into Northern Italy in the late 1990s, from where it has spread throughout Europe. The bug causes abortion of immature cones of Pinus pinea L., with economic impact on the pine‐nut industry. As part of a pest control research program, the egg parasitoid Gryon pennsylvanicum Ashmead (Hymenoptera, Platygastridae) was collected from British Columbia, Canada, and legally introduced to a quarantine climatic chamber in Florence, Italy. The egg parasitoid will be tested against native non‐target heteropterans, an environmental impact assessment will be conducted, and a mass rearing method will be developed if appropriate. The ultimate goal is to release G. pennsylvanicum into Italian P. pinea forests for classical biological control of L. occidentalis. 相似文献
16.
为探明桃蛀螟Conogethes punctiferalis偏好于在青霉菌Penicillium侵染的苹果上产卵的特点与机理,从苹果、玉米和柑橘上分离、纯化获得15株青霉菌,通过形态学和rDNA-ITS序列分析鉴定后,以健康苹果为对照,测试不同青霉菌菌株侵染的苹果对桃蛀螟产卵选择的影响,并利用四臂嗅觉仪测试桃蛀螟对青霉菌诱导的苹果挥发物的行为趋向反应。结果表明,15株青霉菌分别属于皮落青霉P. crustosum、橘青霉P. citrinum、苏门答腊青霉P. sumatrense和指状青霉P. digitatum的不同株型;桃蛀螟对其中的12株青霉菌侵染的苹果的产卵选择率均极显著高于健康苹果,尤其对皮落青霉CO5菌株、苏门答腊青霉OR3菌株和指状青霉OR5菌株侵染的苹果的产卵选择率最高,分别达到67.73%、61.50%和68.39%;桃蛀螟对感染皮落青霉CO5菌株和指状青霉OR5菌株的苹果挥发物的选择率分别为31.37%和29.19%,均显著高于对感染橘青霉OR1菌株和苏门答腊青霉OR3菌株的苹果挥发物的选择率18.14%和21.31%,且前二者之间、后二者之间均无显著差异。表明青霉菌可通过影响寄主植物挥发物释放,从而影响桃蛀螟对寄主植物的产卵选择和行为趋向反应。 相似文献
17.
The egg parasitoidTrissolcus spp. is the natural enemy of the cabbage bug,Eurydema ornatum L. (Het., Pentatomidae), a destructive pest of cultivated and wild Crucifera. Its preferred host is the wheat bugEurygaster integriceps Put., the most important pest of wheat. In order to rear the parasite for biological control purposes, mass production of
its hostE. ornatum is suggested. In a laboratory study, the fecundity ofE. ornatum feeding on garden cress and radish was significantly higher than on red cabbage, white cabbage, rape or cauliflower. The
oviposition period was significantly longer on garden cress and radish than on the other Crucifera. There was no difference
among the various Crucifera in terms of length of postoviposition period or number of eggs laid per female per day. 相似文献
18.
Annalisa Cabras Maria A. Mannoni Salvatorica Serra Anna Andolfi Michele Fiore Antonio Evidente 《European journal of plant pathology / European Foundation for Plant Pathology》2006,115(2):187-193
Sphaeropsis sapinea was repeatedly isolated in Sardinia from symptomatic samples of the upper part of declining pine (Pinus radiata) plants. Observed symptoms mainly consisted of foliage chlorosis, drying of needles and cankers on branches. The S. sapinea strains were shown to produce phytotoxic metabolites in culture filtrates. Three metabolites were isolated for the first time from this fungus and identified by their spectroscopic and optical properties as R-(−)-mellein, (3R,4R)-4-hydroxymellein and (3R,4S)-4-hydroxymellein. When assayed for phytotoxic and antifungal activities on host and non-host plants and on some phytopathogenic fungi, the R-(−)-mellein showed significant activity, while the other two 3,4-dihydroisocoumarins showed only a synergic activity in both tests. 相似文献
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为探究不同食物对兹沃尔新小绥螨Neoseiulus zwoelferi种群生长、发育和繁殖的影响,采用年龄-龄期两性生命表分析测定兹沃尔新小绥螨取食卢氏叶螨Tetranychus ludeni、甜果螨Carpoglyphus lactis和香蒲Typha orientalis花粉后的存活率、发育历期、寿命及繁殖情况。结果显示,3种食物均能满足兹沃尔新小绥螨生长发育和繁殖的需求。卢氏叶螨处理组的净增殖率和总繁殖率分别是28.99和36.99,均显著高于其他2个处理组;以甜果螨、卢氏叶螨和香蒲花粉为食的兹沃尔新小绥螨从卵发育至成螨所需时间分别为5.28、7.34和6.87 d,种群倍增时间分别3.35、4.22和11.77 d,前者显著短于其他2个处理;甜果螨处理组和卢氏叶螨处理组的雌成螨平均寿命分别比香蒲花粉处理组长2.75 d和4.92 d,但两者之间无显著差异;卢氏叶螨处理组雌成螨产卵天数最长,为17.84 d,产卵前期时间最短,为2.75 d,产卵量最大,为38.15粒/雌;香蒲花粉处理组雌成螨产卵天数最短,仅1.82 d,产卵前期时间最长,为5.89 d,产卵量最少,为3.36粒/雌。甜果螨处理组的内禀增长率、周限增长率分别为0.21 d-1和1.23 d-1,均显著高于其他处理组,但平均世代周期为14.65 d,显著低于其他处理组。表明3种食物均可使兹沃尔新小绥螨完成整个世代,其中甜果螨是室内饲养兹沃尔新小绥螨的最佳食物,香蒲花粉可以作为短期饲养的食物。 相似文献