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... Pheromone-baited traps are an important sampling tool in integrated pest management programmes. Studies were conducted to determine the relationship between catches of male insects in these traps, and crop infestation. Numbers of male moths of the pink bollworm, Pectinophora gossypiella (Saunders) (Lepidoptera: Gelechiidae), caught daily in cotton fields at the University of Arizona Cotton Researc ...
plant parasitic nematodes; biological control agents; fungi; bacteria
Abstract:
... This review briefly examines some of the earlier research that lists the natural soil enemies of plant-parasitic nematodes. The major emphasis is on research developments of the past decade that consider biological control of nematodes. The importance of biocontrol has arisen as a consequence of the loss of the two effective but hazardous nematicidal soil fumigants, namely dibromo-chloropropane an ...
tomatoes; postharvest treatment; citrus fruits; apples; grapes; peaches; antagonists; postharvest diseases; biological control agents; secondary metabolites; biological control
Abstract:
... Spoilage of fruits and vegetables after harvest often causes losses as great as 25-50% of the harvested crop. Much of this is due to rot micro-organisms which are currently controlled by refrigeration and fungicides. A number of bacterial and fungal antagonists have been found that can effectively control post-harvest rots of peaches, citrus, apples, grapes and tomatoes. These antagonists have var ...
azadirachtin; insect pests; chemical control; plant products; avermectins; pyrethroid insecticides; new products; synthesis; toxicology; Gossypium; Bacillus thuringiensis; insect growth regulators; integrated pest management; insect control; product development
Abstract:
... Increasing concerns regarding food and feed safety, quality of groundwater and surface water, and resistance of insects to chemical pesticides, have provided added impetus to the development of integrated pest management (IPM) systems for cotton. The chemical industry is cognizant of these concerns and is directing increasing research resources to develop more selective, IPM-compatible pesticides ...
biological control agents; biological control; guidelines; beneficial insects; natural enemies; microbial pesticides; computer software; type collections; United States
Abstract:
... In view of increasing world attention to biodiversity and faunal surveys, improved documentation of the movement of biological control agents from one part of the world to another is needed. More detailed record-keeping and retention of voucher specimens can also help improve the success rate and provide useful feedback for classical biological control programs. The availability of such records wi ...
Gossypium hirsutum; insect pests; mites; Helicoverpa zea; Heliothis virescens; Lygus; Anthonomus grandis; Pectinophora gossypiella; insect control; natural enemies; biological control agents; integrated pest management; biological control; predators; parasites; United States
Abstract:
... The state of the art for controlling four primary pests or pest complexes by augmentative releases of predators and parasitoids in the United States is reviewed. The pests are (1) the bollworm, Helicoverpa zea (Boddie) and tobacco budworm, Heliothis virescens (F.), (2)_the boll weevil, Anthonomus grandis grandis (Boheman), (3) the pink bollworm, Pectinophora gossypiella (Saunders) and (4) plant bu ...
... Four commonly used herbicides were evaluated at two different temperatures and three concentrations (10X, 1X and 0.1X, where X = recommended field rate) for compatibility in vitro with the entomopathogenic fungi Conidiobolus thromboides, C. coronatus, Beauveria bassiana, Metarhizium anisopliae, Paecilomyces farinosus and Verticillium lecanii. The effects of the herbicides on radial growth during t ...
Bemisia tabaci; insecticides; ova; prices; Gossypium hirsutum; Bemisia argentifolii; economic threshold; crop damage; crop yield; control methods; nymphs; population density; insect control; imagos; Arizona; California
Abstract:
... Field studies were conducted during 1993 and 1994 in the Imperial Valley, California and Maricopa, Arizona to examine relationships between densities of Bemisia tabaci (Gennadius) populations and cotton (Gossypium hirsutum L.) yields, and to estimate economic injury levels (EILs) for pest management application. Populations of B. tabaci were manipulated by applying different numbers of insecticide ...
... A series of field experiments were conducted to evaluate Bemisia tahaci (Genn.) infestations in both sprinkler and furrow irrigated cantaloupe and cotton plots under conditions of intense whitefly pressure in Imperial Valley, CA. Various fungal pathogen and insecticide treatments also were compared within each irrigation regime. A consistent finding throughout all experiments was that densities of ...
... Low temperature storage is one component of an integrated control program suggested as an alternative to methyl bromide fumigation for Indianmeal moth, Plodia interpunctella (Hubner), in postharvest dried fruits and nuts. Long-term exposure to 10 degrees C lengthened the life of adults; 50% mortality was reached after 49 days of exposure, almost four times the average adult lifespan of 13 days at ...
... Lemons (Citrus limon Burm.) were evaluated for their tolerance to carbonyl sulfide (COS) fumigation and the influence of COS on market quality. At 70 mg l-1 no significant deleterious changes occurred in market quality up to a fumigation duration of 8 h and only a slight amount of peel injury was observed after 12 h. Longer fumigations lead to the presence of an offensive off-odor in the juice as ...
... The inhibitory effects of six fungicides on macrospore germination and production of secondary conidia of Claviceps africana were studied. Effects of these fungicides on germination of sorghum seed also were determined. Panicles from male-sterile sorghums with honeydew exudate were harvested from the USDA-ARS Research Farm, Isabela, Puerto Rico in the Spring of 1997. Honeydew exudate-infested pani ...
... Diapausing larvae of Pectinophora gossypiella (Saunders) (Lepidoptera: Gelechiidae), were exposed to entomopathogenic nematodes (Nematoda: Steinernematidae; Heterorhabditidae) at a dosage of 100 or 200 infective juveniles (IJ) per larva. No significant differences between infection of Steinernema riobrave (strain 355) Cabanillas, Poinar and Raulston, and Heterorhabditis bacteriophora (strain Cruis ...
insect pests; storage pests; fumigants; integrated pest management; insect control
Abstract:
... Integrated pest management (IPM) programs that eliminate infestations and prevent economic damage in raw commodities, food storage facilities, and milling and processing plants typically involve chemicals. They are preferred because they are often the cheapest and most efficient strategies available. When evaluating pesticides, it is important to recognize the biological and environmental factors ...
Bemisia tabaci; Isaria fumosorosea; biological control agents; entomopathogenic fungi; Bemisia argentifolii; Beauveria bassiana; insect control; Lecanicillium lecanii; biological control
Abstract:
... Recent advances in production, formulation, and application of insect pathogenic fungi have resulted in improvements in long-standing whitefly mycoinsecticide products based on Verticillium lecanii, and development and registration of several new products based on Paecilomyces fumosoroseus and Beauveria bassiana. These products have the capacity to suppress and, in some instances, provide good con ...
Bemisia tabaci; Bemisia argentifolii; natural enemies; biological control agents; integrated pest management; biological control; insect control
Abstract:
... Conservation biological control emphasizes the preservation and enhancement of natural enemies and is the cornerstone of all approaches to biological control. This review critically examines recent and current research efforts in conservation biological control by predators and parasitoids of Bemisia tabaci worldwide. A large number of natural enemy species have been identified from many agricultu ...
Bemisia argentifolii; Bemisia tabaci; insect pests; disease vectors; plant viruses; integrated pest management; insect control
Abstract:
... Bemisia tabaci was described over 100 years ago and has since become one of the most important pests worldwide in subtropical and tropical agriculture as well as in greenhouse production systems. It adapts easily to new host plants and geographical regions and has now been reported from all global continents except Antarctica. In the last decade, international transport of plant material and peopl ...
... Sulfentrazone has excellent soil activity on many small-seeded broadleaf weeds, however, soybean injury in field experiments has been noted under certain environmental conditions. Injury levels in these field experiments have appeared to differ in severity among soybean cultivars. Growth chamber studies were initiated with the objective of examining the suspected differences in tolerance among soy ...
... Accurate estimation of crop damage by wildlife often requires labor-intensive sampling procedures. Variable area transect (VAT) sampling has been identified as a potential labor-saving alternative to quadrat sampling. We fully enumerated all damaged corn plants in a field to assess accuracy of sampling by small quadrats 5 m long by one or two row-widths, and by VAT sampling with searches from rand ...
... Metam sodium alone and in combination with 1,3-dichloropropene plus 17% chloropicrin (1,3-D+C-17) were evaluated under polyethylene mulch film as alternatives for methyl bromide in tobacco and tomato transplant production for both efficacy against pests and crop safety. Eight different weed species, 10 genera or species of fungi and several agronomic criteria were evaluated at three different site ...
... The potential biocontrol bacterium Burkholderia ambifaria isolate BC-F significantly suppressed damping-off of cucumber and soybean caused by Pythium ultimum when applied as a seed coating. Cucumber and soybean seed coated with a peat bond formulation of isolate BC-F had significantly greater plant stands than the non-treated pathogen controls in soil-less mix. Soybean seeds treated with isolate B ...
maple syrup; food contamination; capsaicin; sap; tubes; squirrels; rodent control
Abstract:
... Capsaicins, present in most hot sauces and salsas, are responsible for the "hot" sensation in many spicy foods. At high doses, capsaicins cause significant discomfort upon contact with the sensitive tissues of the mouth and throat of mammals. By applying a capsaicin containing paste to the outside of maple tree sap collection tubing, operators hope to minimize rodent (primarily red squirrel, Tamia ...
... Control of rodents with rodenticides is frequently ineffective due to bait-shyness and neophobia. In an initial study, to increase bait acceptance, Wistar-strain laboratory rats were individually tested for attraction to 3 odors (rat urine, preputial gland extract, and carbon disulfide) and for repellence to a fourth odor (coyote urine) in a 2-compartment arena. Three measures of rat preference-am ...
... Amaranthus rudis can exhibit multiple emergence events during a crop growing season. Control of this species in soybean with soil-applied herbicides can be variable. A 2-yr field research project was conducted to examine the influence of herbicide application timing and dose on efficacy of six soil-applied herbicides for common waterhemp control in soybean. Four weeks after soybean planting, herbi ...
Fusarium oxysporum f. sp. radicis-lycopersici; soil fungi; soil injection; plant diseases and disorders; chloropicrin; methyl bromide; disease control; preplanting treatment; plant pathogenic fungi; Verticillium dahliae; soil fumigation; Fusarium oxysporum f. sp. lycopersici; Solanum lycopersicum var. lycopersicum; Italy; Sicily
Abstract:
... The efficacy of chloropicrin (CP) as a possible alternative fumigant to methyl bromide (MB) was investigated in tomato production systems in Northern (Albenga, Liguria) and Southern (Acate, Sicily) Italy, in six experimental trials. Two different application methods were tested: soil injection using traditional shank fumigation equipment and drip fumigation through the irrigation systems using dif ...
... Rhizoctonia root and hypocotyl rot, caused by Rhizoctonia solani, is a common disease of soybean. Field studies established to observe how preemergence and postemergence herbicides affect the severity of Rhizoctonia root and hypocotyl rot on several soybean cultivars were conducted in Champaign, Dekalb, Monmouth, and Urbana, IL. Herbicides did not significantly (P < or = 0.05) decrease the R. sola ...
... Abstract: Toxicities of two piperidine alkaloids, pipernonaline and piperoctadecalidine, isolated from Piper longum L. were determined against five species of arthropod pests. The most potent insecticidal activities of both alkaloids, pipernonaline (LD50 = 125 mg/l) and piperoctadecalidine (LD50 = 95.5 mg/l), were against Spodoptera litura F. (Lepidoptera: Noctuidae). Both alkaloids also showed in ...
... Basil seedlings were drenched with water or Fusarium oxysporum strain CS-20. The following week, plants were placed in hydroponic troughs with a circulating nutrient solution. Since 2% of the seed was naturally infested with F. oxysporum f. sp. basilici, pathogen inoculum was not applied. After 7 weeks, there were significantly fewer dead stems in plants treated with strain CS-20 than in the contr ...
... Replicated field studies were conducted over a three-year period to assess the yield-reducing potential of southern blight (Sclerotium rolfsii) on cowpea, and to evaluate the range of genetic variability in cowpea germplasm for resistance. Southern blight was shown to have a considerably greater impact on dry-seed yields than that suggested by a review of the published literature. The disease caus ...
Elaeis guineensis; Rattus; baits; corn; palm oils; plantations; prices; rats; warfarin; United States
Abstract:
... Systematic rat control was developed in oil palm plantations in the 1960s and 1970s by comparing bait mixtures and application techniques mainly for anticoagulant poisons, in trials with related ecological studies. Rattus tiomanicus populations of 100-600/ha were estimated in plantings of a range of ages and localities, and numbers fluctuated slowly within these limits in a single plot without con ...
... In Kenya, Thrips tabaci Lind., is an important constraint to onion production. The current strategy to use synthetic pesticides is inadequate and unsustainable. An isolate of Metarhizium anisopliae (Metsch.) Sorok. with high pathogenicity to legume thrips, Megalurothrips sjostedti, and western flower thrips, Frankliniella occidentalis, was tested in field trials as a potential alternative for cont ...
... A precise and accurate method for delivering conidia of powdery mildew (Blumeria graminis f. sp. hordei) onto artificial and natural substrates was developed for use in studies to optimise the bioefficacy of crop protection agents. This included a modification of a Potter laboratory spray tower by the incorporation of a nylon mesh membrane capable of vibration in a variable and controlled manner b ...
... Surveys of those applying pesticides in Cameroon was made as an initial part of a programme to introduce the adoption of minimum requirements for pesticide application equipment as the initial part of a programme for the sustainable improvement of rural workers and family health, to protect the environment and improve crop production efficiency. The survey considered those growing cocoa, coffee, o ...
... Metam-sodium (MS) and dazomet (DAZ) are soil fumigants that generate methyl-isothiocyanate (MITC) in soil. The latter effectively controls soilborne plant pathogens. Recently, we have found that repeated applications of MS yield less effective pathogen control. Soil samples collected from 12 field sites in Israel without (nonhistory) or with (history) previous applications of MS or DAZ were tested ...
... Acibenzolar-S-methyl (ASM) is a synthetic analogue of salicylic acid developed for use in a novel strategy for crop protection through systemic acquired resistance (SAR). ASM protected cantaloupe against a fungal pathogen, Colletotrichum lagenarium, and a viral pathogen, cucumber mosaic virus (CMV). ASM induced the systemic accumulation of chitinase, a marker protein for SAR, in both greenhouse an ...
... Transgenic plants are produced via Agrobacterium mediated transformation and other direct DNA transfer methods. A number of transgenes conferring resistance to insects, diseases and herbicide tolerance have been transferred into crop plants from a wide range of plant and bacterial systems. In the majority of the cases, the genes showing expression in transgenic plants are stably inherited into the ...
... The age and fecundity of female red palm weevils Rhynchophorus ferrugineus (Olivier) captured in food-baited pheromone (4-methyl-5-nonanol) traps placed in coconut plantations of Goa in Western India was assessed in the laboratory. Captured weevils were young and gravid. About 85 per cent of pheromone trap-captured female weevils confined to a celibate life in the laboratory were fertile and laid ...
... Black mustard (Brassica nigra L.) contains water-soluble substances that inhibited the germination and seedling growth of wild oat (Avena fatua L.). Determining where allelochemicals may be found in B. nigra in the greatest concentration would aid in trying to isolate the compound or compounds responsible for autotoxicity. This study investigated the allelopathic effects of various B. nigra plant ...
Fusarium; Phytophthora cryptogea; Trichoderma; disinfection; filtration; fungi; production technology; rhizosphere; root rot; sand; selective media
Abstract:
... In two separate trials during 2000-2002, the efficacy of slow sand filtration and UV treatment in eliminating Phytophthora cryptogea propagules, artificially added in the recirculating nutrient solution, was evaluated with gerbera plants grown in closed soilless systems. A slow sand filtration technique was tested both alone and in combination with different antagonistic strains belonging to Fusar ...
... Laboratory bioassays were carried out to evaluate the efficacy of various products with potential for slug and snail control in horticulture and agriculture. The products tested were cinnamamide, copper ammonium carbonate, garlic, aluminium and copper foil, a mulch, ureaformaldehyde and the proprietary products SnailBan® and Tex-R® matting. The trials were carried out using the slug Deroceras pano ...
... Waterhyacinth (Eichhornia crassipes (Mart.) Solms) is one of the world's most important aquatic weeds. The fungal pathogen Alternaria alternata (Fr.) Keissler was isolated from diseased waterhyacinth plants collected in India. No crop tested was susceptible to the fungus. On waterhyacinth, the fungus induces disease symptoms (i.e., lesions) mainly on leaves and less severely on petioles. The appli ...
... Two neonicotinoid seed dressing insecticides (imidacloprid and thiamethoxam) are registered in South Africa for control of the black maize beetle, Heteronychus arator, in maize. The systemically translocated antifeedant and/or repellent activity of these two neonicotinoids and an unregistered neonicotinoid, acetamiprid, were compared in laboratory bioassays. In all trials treated and untreated see ...
... Pyrenophora tritici-repentis (Died) Drechs. (anamorph=Drechslera tritici-repentis (Died) Shoem. is one of the most important and widespread necrotrophic pathogen of wheat in Argentina. Breeding, chemical treatments and appropriate cultural practices are the main ways for disease control. The possibility of biological control is added as a complementary strategy within the integrated management of ...
... Possibilities of biological control were investigated by the use of some antagonists for controlling Erwinia chrysanthemi, the causal agent of soft rot on tomato. Seventy-one candidate antagonists were isolated from tomato rhizosphere in Adana and Mersin sites in Turkey and the remaining seven isolates were obtained from Plant Protection Department in Israel. In petri dishes studies, 14 isolates i ...
... Plants may favorably or adversely affect other plants through allelochemicals, which may be released directly or indirectly from live or dead plants (including microorganisms). Due to increase in the number of herbicide-resistant weeds and environmental concerns in the use of synthetic herbicides, there have been considerable efforts in designing alternative weed management strategies. The convent ...
... Five plant growth promoting rhizobacterial formulations, each consisting of two Bacilli strains with chitosan as a carrier were tested for their capacity to promote growth and induce resistance against downy mildew in pearl millet under both greenhouse and field conditions. Three modes of applications were tested: seed treatment, soil amendment, and seed treatment+soil amendment. In general, irres ...
... The brown planthopper, Nilaparvata lugens, and the white-backed planthopper, Sogatella furcifera, are phloem feeders. Experiments were conducted to compare plant response of japonica and indica rice cultivars to N. lugens and S. furcifera feeding, and quantify the amount of feeding by these hopper species on various rice cultivars. Plant height, tiller number, leaf area and organ dry weights, and ...
... Poor control of fungal diseases can be related with the application of fungicide which is difficult in steep vineyards. Spray distribution using a tracer obtained with a standard axial fan sprayer was compared to that of a large volume air blast sprayer, a helicopter, an over-row sprayer, a tunnel sprayer (recycling, not air assisted) and a motorized knapsack mistblower. Field experiments were con ...
... The cost-effectiveness of habitat manipulation as a management strategy for the control of rodent pests in Australian macadamia (Macadamia integrifolia) orchards was investigated in a 3-yr study that combines a pest management strategy with a conservation outcome. The manipulation involved the total removal of exotic weeds from an adjacent non-crop riparian habitat, which harboured a high density ...
... Orobanche crenata is a major constraint for winter pea production in Mediterranean and East Asian countries. Screening for resistance performed under field conditions in 20 field pea cultivars showed that very low levels of genetic resistance were available. The resistance proved to be highly influenced by environmental conditions and needs to be supplemented with other control measures. Infection ...