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Search Results: 1 - 10 of 31376 matches for " Panizzi Ant?nio Ricardo "
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Stink bugs (Heteroptera, Pentatomidae) and an unique host plant in the Brazilian subtropics
Panizzi, Antnio Ricardo;Grazia, Jocélia;
Iheringia. Série Zoologia , 2001, DOI: 10.1590/S0073-47212001000100003
Abstract: stink bugs are seed/fruit sucking insects feeding on an array of host plants. among them, an exotic tree called privet, ligustrum lucidum ait. (oleaceae), is very common in the urban areas of the brazilian subtropics, where it is utilized as food source and shelter for over a decem species of bugs, year round. the species composition, their performance and abundance on this host, and possible causes for this association are discussed and illustrated.
Responses of Neomegalotomus parvus (Hemiptera: Alydidae) to color and male-lured traps
Ventura, Maurício Ursi;Panizzi, Antnio Ricardo;
Brazilian Archives of Biology and Technology , 2004, DOI: 10.1590/S1516-89132004000400005
Abstract: in 1998, the relative responses of neomegalotomus parvus (westwood) (hemiptera: alydidae) to colors in traps were assessed in the field. colors were printed in white alkaline paper and covered with transparent plastic. printed colors were black, green, yellow, red and blue. treatments also included white paper and aluminum foil. green traps captured more bugs than the other traps (except yellow). yellow traps caught significantly more n. parvus males than blue, black and aluminum traps. white, red and blue traps captured significantly more n. parvus males than black traps. in 1999, the same treatments were used and additionally included the factor presence (x absence) of males in cages in the traps. four males were confined in the cages together with pigeon pea seeds and water. control traps received only pigeon pea seeds and water. no responses were found for color comparisons. male-lured traps captured significantly more males than control traps.
Morphology of olfactory sensilla and its role in host plant recognition by Neomegalotomus parvus (Westwood) (Heteroptera: Alydidae)
Ventura, Maurício Ursi;Panizzi, Antnio Ricardo;
Brazilian Archives of Biology and Technology , 2005, DOI: 10.1590/S1516-89132005000500012
Abstract: the external morphology of the sensilla, including pores and permeable points on the cuticle of the antennae of adults of neomegalotomus parvus (west.) (heteroptera: alydidae) was investigated with regard to their olfactory function. behavioural evidence of olfaction, the importance of the different antennal segments in locating the host under still-air, and the responses of the insects to plants' scents and to pheromones in wind assays were also studied. with the scanning electronic microscope mechanoreceptor sensilla were found on the four segments of the antennae of n. parvus. the density of the sensilla was greater on the 4th segment. on the apical segment, sensilla with olfactory morphological traits were observed. bugs with intact antennae located food more frequently and faster than those with blocked or amputated antennae. n. parvus preferred intact seeds to sealed seeds, but there was no preference when the last segment of the antenna was blocked. in wind tunnel, bugs were attracted to mature and green pods, and to hexanic extract of mature pods of pigeon pea, cajanus cajan (l.) millsp.; there was no response to panicles of rice, oryza sativa l. or to the male pheromone.
Population dynamics, gregarious behavior and oviposition preference of Neomegalotomus parvus (Westwood) (Hemiptera: Heteroptera: Alydidae)
Ventura, Maurício Ursi;Panizzi, Antnio Ricardo;
Brazilian Archives of Biology and Technology , 2003, DOI: 10.1590/S1516-89132003000100006
Abstract: interactions between neomegalotomus parvus (westwood) (coreoidea: heteroptera: alydidae) and host plants were investigated including population monitoring throughout the year, gregarious behavior in the field, and oviposition preference among host plants and one non-host plant in field cages. cowpea, vigna unguiculata (l.) walp., soybean, glycine max (l.) mill. cv. br 37, pigeon pea, cajanus cajan (l.) mill., pigeon pea cv. an?o, and lablab, dolichos lablab l. were monitored in the field. n. parvus was found on host plants during 11 months. the shortest period of occurrence was observed on soybean and the longest on lablab. insects were found mostly on mature pods. contagious distribution (negative bionomial) was detected, characterizing the aggregation. greater number of eggs were observed on pigeon pea, followed by soybean and lablab. eggs were not found on cowpea, on common bean phaseolus vulgaris l., and on rice, oryza sativa l.
Nymph and Adult Performance of the Small Green Stink Bug, Piezodorus guildinii (Westwood) on Lanceleaf Crotalaria and Soybean
Panizzi, Antnio Ricardo;Cardoso, Shirlei Regina;Chocorosqui, Viviane Ribeiro;
Brazilian Archives of Biology and Technology , 2002, DOI: 10.1590/S1516-89132002000100009
Abstract: lanceleaf crotalaria, crotalaria lanceolata e. mey (leguminosae) was found hosting the small green stink bug, piezodorus guildinii (westwood), in paraná state, brazil. in the laboratory, nymphs showed less mortality when fed on immature pods of crotalaria (64%) than when fed on immature pods of soybean, glycine max (l.) merrill (88%). from 2nd stadium to adult, nymphs required less time to complete development on crotalaria (mean of females and males = 18.4 days) than on soybean (21.5 days). fresh body weight at adult emergence was greater on crotalaria (mean of females and males = 51.4 mg) than on soybean (42.2 mg). adult p. guildinii tended to live longer on crotalaria than on soybean. mean adult longevity was 34.6 days on crotalaria, and 28.8 days on soybean. however, the reproductive performance of females, although similar on both foods, tended to be greater on soybean. these results indicated that p. guildinii was able to develop and reproduce on the wild host lanceleaf crotalaria. compared to soybean, this weed plant was more suitable for nymph development, and equally suitable for adult reproduction.
Population dynamics, gregarious behavior and oviposition preference of Neomegalotomus parvus (Westwood) (Hemiptera: Heteroptera: Alydidae)
Ventura Maurício Ursi,Panizzi Antnio Ricardo
Brazilian Archives of Biology and Technology , 2003,
Abstract: Interactions between Neomegalotomus parvus (Westwood) (Coreoidea: Heteroptera: Alydidae) and host plants were investigated including population monitoring throughout the year, gregarious behavior in the field, and oviposition preference among host plants and one non-host plant in field cages. Cowpea, Vigna unguiculata (L.) Walp., soybean, Glycine max (L.) Mill. cv. BR 37, pigeon pea, Cajanus cajan (L.) Mill., pigeon pea cv. An o, and lablab, Dolichos lablab L. were monitored in the field. N. parvus was found on host plants during 11 months. The shortest period of occurrence was observed on soybean and the longest on lablab. Insects were found mostly on mature pods. Contagious distribution (negative bionomial) was detected, characterizing the aggregation. Greater number of eggs were observed on pigeon pea, followed by soybean and lablab. Eggs were not found on cowpea, on common bean Phaseolus vulgaris L., and on rice, Oryza sativa L.
Nymph and Adult Performance of the Small Green Stink Bug, Piezodorus guildinii (Westwood) on Lanceleaf Crotalaria and Soybean
Panizzi Antnio Ricardo,Cardoso Shirlei Regina,Chocorosqui Viviane Ribeiro
Brazilian Archives of Biology and Technology , 2002,
Abstract: Lanceleaf crotalaria, Crotalaria lanceolata E. Mey (Leguminosae) was found hosting the small green stink bug, Piezodorus guildinii (Westwood), in Paraná State, Brazil. In the laboratory, nymphs showed less mortality when fed on immature pods of crotalaria (64%) than when fed on immature pods of soybean, Glycine max (L.) Merrill (88%). From 2nd stadium to adult, nymphs required less time to complete development on crotalaria (mean of females and males = 18.4 days) than on soybean (21.5 days). Fresh body weight at adult emergence was greater on crotalaria (mean of females and males = 51.4 mg) than on soybean (42.2 mg). Adult P. guildinii tended to live longer on crotalaria than on soybean. Mean adult longevity was 34.6 days on crotalaria, and 28.8 days on soybean. However, the reproductive performance of females, although similar on both foods, tended to be greater on soybean. These results indicated that P. guildinii was able to develop and reproduce on the wild host lanceleaf crotalaria. Compared to soybean, this weed plant was more suitable for nymph development, and equally suitable for adult reproduction.
Danos do percevejo barriga-verde Dichelops melacanthus (Dallas) (Heteroptera: Pentatomidae) em trigo
Manfredi-Coimbra, Silvana;Silva, Jovenil José da;Chocorosqui, Viviane Ribeiro;Panizzi, Antnio Ricardo;
Ciência Rural , 2005, DOI: 10.1590/S0103-84782005000600003
Abstract: the objective of this study was to evaluate the reaction of two cultivars of wheat to the damage caused by adults of the green belly stink bug, dichelops melacanthus (dallas), confined on the culture from the beginning of tillering. the effect of different infestation levels (0, 2, 4, 8 and 16 bugs m-2) on the number of tillers m-2, number of spikes m-2, weight of 1,000 seeds (g), and yield (kg ha-1) was evaluated on wheat cvs. ?br 18' and ?brs 193', in londrina, paraná state. the number of tillers m-2 increased linearly on ?br 18' and in a quadratic form on ?brs 193', with the increase of the number of bugs m-2; the number of spikes m-2, the weight of 1,000 seeds, and the yield decreased linearly with the increase of the infestation level on both cultivars. ?brs 193' was the most susceptible to the attack of d. melacanthus, showing a reduction of 254.4kg for each unit of increase in the number of bugs m-2.
Rearing the southern green stink bug using an artificial dry diet and an artificial plant
PANIZZI, ANTNIO RICARDO;PARRA, JOSé ROBERTO POSTALI;SANTOS, CLáUDIA HIRT;CARVALHO, DIOGO RODRIGUES;
Pesquisa Agropecuária Brasileira , 2000, DOI: 10.1590/S0100-204X2000000900002
Abstract: laboratory and greenhouse studies were conducted with an artificial dry diet to rear nymphs, and with an artificial plant as substrate for egg laying by the southern green stink bug, nezara viridula (l.). the artificial diet was composed of: soybean protein (15 g); potato starch (7.5 g); dextrose (7.5 g); sucrose (2.5 g); cellulose (12.5 g); vitamin mixture (niacinamide 1 g, calcium pantothenate 1 g, thiamine 0.25 g, riboflavin 0.5 g, pyridoxine 0.25 g, folic acid 0.25 g, biotin 0.02 ml, vitamin b12 1 g - added to 1,000 ml of distilled water) (5.0 ml); soybean oil (20 ml); wheat germ (17.9 g); and water (30 ml). nymphs showed normal feeding behavior when fed on the artificial diet. nymphal development time was longer than or similar to that of nymphs fed on soybean pods. total nymphal mortality was low (ca. 30%), both for nymphs reared on the artificial diet, and for nymphs fed on soybean pods. at adult emergence, fresh body weights were significantly (p<0.01) less on the artificial diet than on soybean pods. despite the lower adult survivorship and fecundity on artificial plants than on soybean plants, it was demonstrated for the first time that a model simulating a natural plant, can be used as a substrate for egg mass laying, in conjunction with the artificial diet.
Rearing the southern green stink bug using an artificial dry diet and an artificial plant
PANIZZI ANTNIO RICARDO,PARRA JOSé ROBERTO POSTALI,SANTOS CLáUDIA HIRT,CARVALHO DIOGO RODRIGUES
Pesquisa Agropecuária Brasileira , 2000,
Abstract: Laboratory and greenhouse studies were conducted with an artificial dry diet to rear nymphs, and with an artificial plant as substrate for egg laying by the southern green stink bug, Nezara viridula (L.). The artificial diet was composed of: soybean protein (15 g); potato starch (7.5 g); dextrose (7.5 g); sucrose (2.5 g); cellulose (12.5 g); vitamin mixture (niacinamide 1 g, calcium pantothenate 1 g, thiamine 0.25 g, riboflavin 0.5 g, pyridoxine 0.25 g, folic acid 0.25 g, biotin 0.02 mL, vitamin B12 1 g - added to 1,000 mL of distilled water) (5.0 mL); soybean oil (20 mL); wheat germ (17.9 g); and water (30 mL). Nymphs showed normal feeding behavior when fed on the artificial diet. Nymphal development time was longer than or similar to that of nymphs fed on soybean pods. Total nymphal mortality was low (ca. 30%), both for nymphs reared on the artificial diet, and for nymphs fed on soybean pods. At adult emergence, fresh body weights were significantly (P<0.01) less on the artificial diet than on soybean pods. Despite the lower adult survivorship and fecundity on artificial plants than on soybean plants, it was demonstrated for the first time that a model simulating a natural plant, can be used as a substrate for egg mass laying, in conjunction with the artificial diet.
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