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Search Results: 1 - 10 of 5962 matches for " RA;Panizzi "
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Duration of feeding and superficial and in-depth damage to soybean seed by selected species of stink bugs (Heteroptera: Pentatomidae)
Depieri, RA;Panizzi, AR;
Neotropical Entomology , 2011, DOI: 10.1590/S1519-566X2011000200007
Abstract: laboratory studies were conducted to compare duration of feeding and superficial and in-depth damage to soybean (glycine max) seeds by the southern green stink bug, nezara viridula (l.), the neotropical brown stink bug, euschistus heros (f.), the red-banded stink bug, piezodorus guildinii (westwood), and the green-belly stink bug, dichelops melacanthus (dallas). results indicated that feeding time was significantly longer for n. viridula (≈ 133 min) compared to e. heros and d. melacanthus (≈ 70 min), but not different from p. guildinii (≈ 103 min). there was a positive correlation between feeding time and the resulting damage for e. heros, n. viridula and p. guildinii (r2 > 0.80, p < 0.0001), but not for d. melacanthus (r2 = 0.1011, p = 0.1493). the deepest seed damage (2.0 mm) was made by p. guildinii and the shallowest (0.5 mm) by d. melacanthus. the depth of the seed damage by e. heros and n. viridula (0.8, 1.2 mm, respectively) was intermediate in comparison to the other species studied. feeding damage to the seed endosperm caused variable cell disruption and protein body dissolution, particularly when p. guildinii fed on seeds, suggesting that the deleterious action of salivary enzymes was greater for this bug compared to the others.
APEmille: a parallel processor in the teraflop range
Emanuele Panizzi
Physics , 1996, DOI: 10.1016/S0920-5632(96)00842-0
Abstract: APEmille is a SIMD parallel processor under development at the Italian National Institute for Nuclear Physics (INFN). APEmille is very well suited for Lattice QCD applications, both for its hardware characteristics and for its software and language features. APEmille is an array of custom arithmetic processors arranged on a tridimensional torus. The replicated processor is a pipelined VLIW device performing integer and single/double precision IEEE floating point operations. The processor is optimized for complex computations and has a peak performance of 528Mflop at 66MHz and of 800Mflop at 100MHz. In principle an array of 2048 nodes is able to break the Tflops barrier. A powerful programming language named TAO is provided and is highly optimized for QCD. A C++ compiler is foreseen. Specific data structures, operators and even statements can be defined by the user for each different application. Effort has been made to define the language constructs for QCD.
Possible egg positioning and gluing behavior by ovipositing southern green stink bug, Nezara viridula (L.) (Heteroptera: Pentatomidae)
Panizzi, Ant?nio R.;
Neotropical Entomology , 2006, DOI: 10.1590/S1519-566X2006000100022
Abstract: from march 2002 to january 2004, a colony of southern green stink bug, nezara viridula (l.), was kept in the laboratory, and its oviposition behavior was observed. during oviposition, soon after the egg is expelled, the female touches the egg mass with the dorsal surface of the last tarsomere; this movement of one leg of the hind pair occurred once. this small component of the oviposition behavior of this pentatomid is little known and not yet fully understood; it may help to position and glue the newly deposited egg to the others.
Stink bugs on soybean in northeastern Brazil and a new record on the southern green stink bug, Nezara viridula (L.) (Heteroptera: Pentatomidae)
Neotropical Entomology , 2002, DOI: 10.1590/S1519-566X2002000200023
Abstract: during march-april 2001, a survey of pentatomids associated with soybean [glycine max (l.) merrill] was conducted at northeastern brazil (balsas county ? maranh?o state - latitude 7°31's, longitude 46°02'w). the majority of the phytophagous bugs (82.4%) belonged to the species euschistus heros (f.). other six species of bugs were collected in much lower numbers (<5.0%). among them, the exotic species, nezara viridula (l.), was intercepted in this area for the first time, expanding its distribution in the neotropical region.
Suboptimal nutrition and feeding behavior of hemipterans on less preferred plant food sources
Panizzi, Ant?nio R.;
Anais da Sociedade Entomológica do Brasil , 2000, DOI: 10.1590/S0301-80592000000100001
Abstract: phytophagous hemipterans (heteropterans) are, in general, polyphagous, feeding on a wide array of plants. among these, less preferred plant food sources are also explored as food and/or shelter. to illustrate this, i will discuss the feeding behavior of the southern green stink bug, nezara viridula (l.) (pentatomidae) on less preferred plants in northern paraná state. this bug feeds on several uncultivated-wild, and on cultivated plants, which are less preferred, changing its feeding behavior, from a typical seed/fruit sucking habit, to leaf/stem feeding, with consequences for its nymphal and adult performance. other seed suckers, such as euschistus heros (f.) and dichelops melacanthus (dallas) (pentatomidae) and neomegalotomus parvus westwood (alydidae), also change their feeding behavior from seeds to vegetative tissues (leaf, stems) when feeding on less preferred food plants. these and other mentioned examples demonstrate that for this feeding guild in particular, the less preferred food plant sources play an important role in the life history of these bugs, and that this fact is, in general, underestimated.
A possible territorial or recognition behavior of Leptoglossus zonatus (Dallas) (Heteroptera, Coreidae)
Panizzi, Ant?nio R.;
Revista Brasileira de Entomologia , 2004, DOI: 10.1590/S0085-56262004000400022
Abstract: the coreid leptoglossus zonatus (dallas, 1852) is commonly found in corn (zea mays l.) fields in brazil, and it has been observed flying and landing on objects or persons near these fields. during january, 1995, this behavior was studied in corn plantations. results indicated that the bugs concentrated on objects (plastic cylinders traps) introduced into their habitat and that their number increased during the first 24 hs. however, as time passed (8 days), this possible territorial or recognition behavior gradually decreased, and tended to disappear.
LHC Signatures of Vector-Like Quarks
Yasuhiro Okada,Luca Panizzi
Advances in High Energy Physics , 2013, DOI: 10.1155/2013/364936
Multimethods and separate static typechecking in a language with C++-like object model
Emanuele Panizzi,Bernardo Pastorelli
Computer Science , 2000,
Abstract: The goal of this paper is the description and analysis of multimethod implementation in a new object-oriented, class-based programming language called OOLANG. The implementation of the multimethod typecheck and selection, deeply analyzed in the paper, is performed in two phases in order to allow static typechecking and separate compilation of modules. The first phase is performed at compile time, while the second is executed at link time and does not require the modules' source code. OOLANG has syntax similar to C++; the main differences are the absence of pointers and the realization of polymorphism through subsumption. It adopts the C++ object model and supports multiple inheritance as well as virtual base classes. For this reason, it has been necessary to define techniques for realigning argument and return value addresses when performing multimethod invocations.
Survivorship and Egg Production of Phytophagous Pentatomids in Laboratory Rearing
Silva, FAC;Calizotti, GS;Panizzi, AR;
Neotropical Entomology , 2011, DOI: 10.1590/S1519-566X2011000100005
Abstract: survivorship and reproductive performance of the pentatomids euschistus heros (f.) (eh), nezara viridula (l.) (nv), and dichelops melacanthus (dallas) (dm) were tested in the laboratory. a mixture of natural foods (pods of green beans, phaseolus vulgaris, raw shelled peanuts, arachis hypogaea, and fruits of privet, ligustrum lucidum, and 50 pairs/box (25 x 20 x 20 cm) were used, observed for 30 days, and replicated three times. thirty days after emergence, mean female survivorship was 91% (eh), 60% (nv), and 30% (dm). more egg masses were deposited during 11-20 days after emergence, with mean number of 45.1 (eh), 5.3 (nv), and 11.8 (dm). these values were smaller during the first 10 days (25.5, 2.1, and 4.7) and last 10 days (21-30 days) (39.4, 3.9, and 4.9), respectively. mean maximum number of eggs/day was 489 (eh) on day 29, 474 (nv) on day 11, and 153 (dm) on day 14. mean monthly fecundity (egg masses/box) was 985 (eh), 92 (nv), and 193 (dm), and mean number of eggs/box was 8,480; 5,147, and 2,042.7, respectively.
Nymph and adult biology of Dichelops melacanthus (Dallas) (Heteroptera: Pentatomidae) feeding on cultivated and non-cultivated host plants
Chocorosqui, Viviane R.;Panizzi, Ant?nio R.;
Neotropical Entomology , 2008, DOI: 10.1590/S1519-566X2008000400001
Abstract: the biology of the pentatomid dichelops melacanthus (dallas) feeding on cultivated and non-cultivated plants was studied in the laboratory. nymph mortality varied from ≈ 60 on corn (seed mature) to 77% on wheat (ear immature); no nymphs survived on seedlings of corn or wheat. nymph developmental time on soybean, corn or wheat (seed, pod or ear) varied from 25.5 to 32.8 days. body weight at adult emergence was similar and greater on most foods than on wheat ear. nymphs fed preferentially on soybean (pod immature). on non-cultivated hosts, nymphs showed high mortality (73%) on crotalaria (pod immature); on tropical spiderwort (stem) all nymphs died. nymphs took longer time to develop on crotalaria and/or on spiderwort than on soybean. body weight at adult emergence did not differ on crotalaria or soybean. survivorship decreased with time on most foods, with ≈50% of adults alive at day 30. on corn and wheat seedlings ≈80% of adults were dead on day 20. adult longevity ranged 31-43 days, except on corn and wheat seedlings < 15 days. females % ovipositing peaked (≈76%) on soybean (pod or seed immature), and was minimum (≈9%) on wheat ear (immature); no females reproduced on seedlings of corn or wheat. preoviposition period was shorter (≈12 days) on soybean (immature pod or seed) and longer (≈37 days) on wheat (ear immature). fecundity was similar and higher on all foods than on wheat (ear immature). body weigh gain occurred on all foods, but on corn and wheat seedlings. adults fed preferably on soybean (pod immature and seed mature); wheat (seedling) was the least preferred food.
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