scholarly journals Bean Leaf Beetle (Coleoptera: Chrysomelidae) Abundance in Soybean Fields Protected and Unprotected by Shelterbelts

2000 ◽  
Vol 35 (4) ◽  
pp. 385-390 ◽  
Author(s):  
S. D. Danielson ◽  
J. R. Brandle ◽  
L. Hodges ◽  
P. Srinivas
Keyword(s):  
Insect Pests ◽  
Agricultural Research ◽  
Insect Pest ◽  
Leaf Beetle ◽  
Leaf Beetles ◽  
Bean Leaf Beetle ◽  
Two Generations ◽  
Agricultural Research And Development ◽  
Soybean Plants ◽  
The University

The bean leaf beetle, Cerotoma trifurcata (Forster) (Coleoptera: Chrysomelidae), is a major insect pest of soybean in Nebraska and throughout much of the Midwest. This insect overwinters in the adult stage in litter in wooded areas such as shelterbelts. Historically, crop producers have been unsure of the merits of shelterbelts, especially if nearby crops are more likely to be infested by insect pests as a result. In this study, bean leaf beetle adults were sampled during the season by visually counting the number of beetles found on soybean plants early in the season and by sweep net sampling once plants were at the V4 stage (approximately 0.33 m tall). Sampling was done in 1997 and 1998 at the University of Nebraska Agricultural Research and Development Center in Saunders Co. in east-central Nebraska. Beetle counts were compared between shelterbelt-protected and -unprotected fields. In general, bean leaf beetles were more numerous in 1997 than in 1998, with abundance peaks occurring in late-July and early-September in both years. There were significant differences in bean leaf beetle counts from protected and unprotected fields on only three of the 11 and four of the 13 sampling dates in 1997 and 1998, respectively. On the sampling dates when significant differences were found, two of three in 1997 and three of four in 1998 had higher bean leaf beetle abundance in the protected soybean fields. The results of this study indicate a tendency for more bean leaf beetles in shelterbelt-protected soybean fields when differences are found, but beetle numbers were not significantly different between protected and unprotected fields on the majority of sample dates in the two years of this study. This study also reconfirms the presence of two generations of the bean leaf beetle in Nebraska.

scholarly journals Preliminary Research on the Wheat Pests and on Their Integrated Control during 2015-2016, at Agricultural Research-Development Station Turda

2017 ◽  
Vol 74 (1) ◽  
pp. 1
Author(s):  
Ionel Dragoş DĂRAB ◽  
Dana MALASCHI ◽  
Ana Maria VĂLEAN ◽  
Adina Daniela TĂRĂU ◽  
Cornel CHEŢAN ◽  
...  
Keyword(s):  
Insect Pests ◽  
Agricultural Research ◽  
Integrated Control ◽  
Rhopalosiphum Padi ◽  
Leaf Beetle ◽  
Study Data ◽  
Pest Monitoring ◽  
Agricultural Research And Development ◽  
Professional Study ◽  
Integrated Pest Control

In Transylvania, the evolution of wheat insect pests is strongly influenced by the ecotehnological conditions, by climate change and current technology (Malschi, 2009 Malschi et al., 2015). The paper presents the dynamics and importance of the main pests of wheat (thrips, aphids, leafhoppers, wheat flies, cereals sunbugs, investigated under the integrated pest control system suitable of the area. During 2015-2016, the investigations were conducted at the Agricultural Research and Development Station Turda, from the wheat no tillage cultural system with cereal rotation of three years and applying all zonal recommendations of technology and phytosanitary complex. The pest monitoring was performed based on the samples collected with entomological net, by decadal 100 sweep-net catches/sample. The study data shows the danger of the attack of abundant populations of wheat flies (Phorbia securis, Delia coarctata, Opomyza florum, Oscinella frit etc.; wheat fleas (Chaetocnema aridula) and cereal leaf beetle (Oulema melanopa); leafhoppers (Psammotettix alienus, Javesella pellucida, Macrosteles laevis); aphids (Sitobion avenae, Schizaphis graminum, Rhopalosiphum padi); thrips (Haplothrips tritici), sunbugs (Eurygaster maura, Aelia acuminata) etc., and the necessity of applying insecticide treatments on the vegetation.Since 2015, a stronger impact of global warming on the wheat pests structure (%) are found. This change began on the last ten years. The importance of cereal sunbugs is increasing, well as the importance of the wheat flies, aphids and leafhoppers, which requires professional study on the pest dynamics and adequate integrated control of wheat pests.

scholarly journals Evaluation of New Systemic Insecticides for Elm Insect Pest Control

1996 ◽  
Vol 14 (1) ◽  
pp. 22-26 ◽  
Author(s):  
D. Casey Sclar ◽  
Whitney S. Cranshaw
Keyword(s):  
Pest Control ◽  
Woody Plants ◽  
Insect Pests ◽  
Insect Pest ◽  
Leaf Beetle ◽  
Pest Species ◽  
Shade Trees ◽  
Insect Pest Control ◽  
Systemic Activity ◽  
Systemic Insecticides

Abstract Use of systemic insecticides that can be injected either into the root system or trunk of woody plants provides several potential advantages, notably in control of drift during application. Recently, new classes of insecticides with systemic activity have been developed, which may supplant the organophosphate and carbamate systemic insecticides that have previously been available. To evaluate their potential to control insects affecting shade trees, studies were conducted using imidacloprid and abamectin on elm. Soil injections of imidacloprid appeared particularly effective, controlling all three of the target pest species in this study (elm leaf beetle, European elm scale, elm leaf aphid). Both imidacloprid and abamectin also were effective against at least some elm insects when injected into trunks. Persistence of irnidacloprid was unusually long, providing second season control of all elm insect pests, although root uptake following soil injections was slow.

scholarly journals APLIKASI PUPUK DAN MULSA JERAMI PADA TANAMAN KEDELAI TERHADAP SERANGAN HAMA DAN PRODUKSI

EUGENIA ◽  
2015 ◽  
Vol 21 (1) ◽  
Author(s):  
J. Rimbing ◽  
J. Pelealu ◽  
D. Sualang
Keyword(s):  
Insect Pests ◽  
Block Design ◽  
Insect Pest ◽  
Inorganic Fertilizer ◽  
Flying Insects ◽  
Randomized Block Design ◽  
Soybean Pest ◽  
Crop Damages ◽  
Virus Attack ◽  
Soybean Plants

ABSTRACT   The research was arranged in a randomized block design (RBD), with 10 treatments and 3 replications. To get the active insects pests, net sweepings were done for the flying insects, while other pests were observed directly on the plants. Collecting data of plant damages were made by systematic diagonal lines, except for viruses, census was conducted on each experimental plot.  The results of this experiment documented 12 species of insect pests attacking soybean plants. Soybean pest populations were relatively low, except for Aphis glycine that was quite high. In all treatments, plant damage caused by sucking pest Piezodorus sp and Riptortus linearis were relatively low of 1.53 % to 1.94 %; it indicated an insignificant effect to decline the production. Crop damages by virus showed a significant effect. The lowest virus attacks found on compost of 5 tons per ha with 43 plants infected per treatment, the highest virus attack showed on combination of 5 tons compost per ha + inorganic fertilizer + mulch, in which there were 274 infected plants per treatment. Apparently virus attacks gave impact on soybean production. The highest production were documented on treatment of 5 tons compost per ha with production of 0.55 tons per ha, while the lowest production was found on combination of 5 tons compost per ha + inorganic fertilizer + mulch, in which the production was 0.22 tons per ha. Keywords:  fertilizer, mulch, insect pest, production

scholarly journals The Influence of foliar fertilization on different soybean genotypes

2021 ◽  
Vol 78 (2) ◽  
pp. 42
Author(s):  
Adrian NEGREA ◽  
Raluca REZI ◽  
Teodor RUSU ◽  
Camelia URDĂ ◽  
Vasilena SUCIU
Keyword(s):  
Agricultural Research ◽  
Vegetation Period ◽  
Negative Effects ◽  
Foliar Fertilization ◽  
Soybean Genotypes ◽  
Agricultural Research And Development ◽  
Soybean Plants ◽  
Leguminous Crops ◽  
Determining Factor ◽  
1000 Grain Weight

Soybean is one of the most important leguminous crops due to its high oil and protein content with a significant role in nutrition. Micronutrients for soybean growth and development are very important and foliar fertilization is used to overcome environmental stress and help soybean plants to fill their nutritive needs. The research was carried out in 2020 by the Soybean Breeding Laboratory from the Agricultural Research and Development Station in Turda, Romania. Foliar fertilization had both positive and negative effects for 1000-grain weight and yield however, quality traits do not seem to be influenced by applying supplement of microelements during the vegetation period. The research suggests that genotype is the determining factor in the efficiency of foliar fertilization. In this sense, the present experiment will continue to bring answers regarding the effects of foliar fertilizers on some soybean genotypes.

POLYMORPHIC FORMS OF THE BEAN LEAF BEETLE, CEROTOMA TRIFURCATA (FORSTER) (COLEOPTERA: CHRYSOMELIDAE), IN SOYBEANS IN MISSISSIPPI: TRANSMISSION OF BEAN POD MOTTLE VIRUS.1

1989 ◽  
Vol 24 (4) ◽  
pp. 582-587 ◽  
Author(s):  
Henry N. Pitre
Keyword(s):  
Growing Season ◽  
Leaf Beetle ◽  
Transmission Efficiency ◽  
Field Population ◽  
Mottle Virus ◽  
Cerotoma Trifurcata ◽  
Bean Pod Mottle Virus ◽  
Bean Leaf Beetle ◽  
Polymorphic Forms ◽  
Soybean Plants

A field population of bean leaf beetle, Cerotoma trifurcata (Forster), adults on soybean, cv. Lee, in north Mississippi showed consistent frequencies of occurrence of polymorphic forms during the growing season. The greatest percentage of beetles were in the beige with spots category (62%), followed in order by beige without spots (27%), crimson with spots (8%), and crimson without spots (3%). Field-collected adults experimentally transmitted bean pod mottle virus from infected soybean plants, cv. Bragg, to healthy seedlings (1st trifoliolate) after a 24-h acquisition feeding on virus infected source plants with equal degrees of polymorph transmission efficiency (29 - 35%, n.s.).

scholarly journals THE KEY SUCCESFULL OF Extension Service On Thailand Durian Performance To The World Market

2021 ◽  
Author(s):  
Dian Galuh Pratita
Keyword(s):  
Research And Development ◽  
Statistical Data ◽  
Agricultural Research ◽  
World Market ◽  
Extension Service ◽  
Personal Experiences ◽  
The World ◽  
Development Region ◽  
Agricultural Research And Development ◽  
The University

This book will not only tell about the keys to the success of Thailand in cultivating durian, but also durian marketing. It does not only contain the author's personal experiences while in Chanthaburi Province but also contains statistical data that supports the statement, as well as other reliable sources. This book is the result of an internship program that has been carried out by the author while in Thailand, especially in Chanthaburi Province, Office of Agricultural Research and Development Region 6 Chanthaburi Province. An internship program was carried out to increase knowledge and experience of agricultural conditions in Thailand which is known to be advanced. The author would like to thank Assoc. Prof. Am On Aungsuratana as the main supervisor during the program in Thailand and Dr. Rapee Dokmaithes. In addition, thanks are also conveyed to all staff and parties involved while the author is in OARD Region 6 so the author can run and complete the internship program smoothly, as well as write about their success in developing durian in Thailand. In addition, the authors also thank the University of Jember for all the knowledge provided. I would also like to thank my father (alm) Irfan Boedi Setiawan S.P., my mother Mrs. Dr. Asrumi, M.Hum, and younger brother Firnanda Pulung Wibowo, S.P., for all their enthusiasm and motivation. Finally, the author would like to thank to beloved husband, Sabran, S.K.M., M.P.H. and lovely son Randika Arung Naradipta for all the support given during the writing of this book. The last happy reading and hopefully useful.

scholarly journals FIELD EVALUATION OF FIVE WHEAT VARIETES AGAINST INSECT PEST INFESTATION

2021 ◽  
Vol 5 (9) ◽  
Author(s):  
Dhananjoy Kumar Mahato ◽  
Md. Mizanur Rahman ◽  
Sadhan Kumer Guha Magumder ◽  
Kazi Md. Abu Sayeed ◽  
Md. Abu Zafur Al Munsur
Keyword(s):  
Insect Pests ◽  
Block Design ◽  
Insect Pest ◽  
Wheat Variety ◽  
Field Evaluation ◽  
Grain Filling ◽  
Leaf Beetle ◽  
Filling Stage ◽  
Physical Resistance ◽  
Grain Filling Stage

The experiment was conducted to evaluate the infestation status of insect pest on different wheat variety. Five wheat variety (BARI GOM -24, BARI GOM-25, BARI GOM-27, BARI GOM-28and BARI GOM-29) were used as a test crop to conduct the study. The experiment was laid out in Randomized Complete Block Design with three replications. Total 5 insect pests were found from this experiment among wheat aphid and wireworm as major and leaf hopper, grass hopper and cereal leaf beetle as minor insect of wheat. The highest insect pest was found in grain filling stage and lowest was found in panicle initiation stage. In grain filling stage, the lowest number of aphid (6.26) was recorded from BARI GOM-29 and the highest number of wheat aphid (9.11) was found in BARI GOM-24. Effect of different varieties of plant height, filled grain, unfilled grain, weight of 1000 grain and yield showed significant. The highest yield (3.56 tha-1 ) was recorded in BARI GOM-29 and the lowest yield 2.29 tha-1 was recorded in BARI GOM-25. The highest percentage of infested spike hill-1 was recorded in BARI GOM-27 and lowest was found in BARI GOM-29. The lowest yield loss (31.53%) was recorded in BARI GOM-29. This is might be due to physical resistance of the varieties. BARI GOM-29 recommended to wheat growers as it is found the most resistant/tolerant wheat cultivar against wheat insect pest with maximum grain yield as compared to other cultivars.

scholarly journals Dispersal in Host–Parasitoid Interactions: Crop Colonization by Pests and Specialist Enemies

Insects ◽  
2018 ◽  
Vol 9 (4) ◽  
pp. 134 ◽  
Author(s):  
Edward Evans
Keyword(s):  
Natural Enemies ◽  
Agricultural Landscape ◽  
Insect Pests ◽  
Leaf Beetle ◽  
Alfalfa Weevil ◽  
Leaf Beetles ◽  
Crop Fields ◽  
Cereal Leaf Beetle ◽  
Spatial Refuge ◽  
Northern Utah

Interactions of insect pests and their natural enemies increasingly are being considered from a metapopulation perspective, with focus on movements of individuals among habitat patches (e.g., individual crop fields). Biological control may be undercut in short-lived crops as natural enemies lag behind the pests in colonizing newly created habitat. This hypothesis was tested by assessing parasitism of cereal leaf beetle (Oulema melanopus) and alfalfa weevil (Hypera postica) larvae at varying distances along transects into newly planted fields of small grains and alfalfa in northern Utah. The rate of parasitism of cereal leaf beetles and alfalfa weevils by their host-specific parasitoids (Tetrastichus julis (Eulophidae) and Bathyplectes curculionis (Ichneumonidae), respectively) was determined for earliest maturing first generation host larvae. Rates of parasitism did not vary significantly with increasing distance into a newly planted field (up to 250–700 m in individual experiments) from the nearest source field from which pest and parasitoid adults may have immigrated. These results indicate strong, rapid dispersal of the parasitoids in pursuing their prey into new habitat. Thus, across the fragmented agricultural landscape of northern Utah, neither the cereal leaf beetle nor the alfalfa weevil initially gained substantial spatial refuge from parasitism by more strongly dispersing than their natural enemies into newly created habitat. Additional studies, including those of colonization of newly planted crops by generalist pests and natural enemies, are called for in assessing these results with a broader perspective.

Sign in / Sign up

Export Citation Format

Share Document