A5006961752- Insect-Plant Interactions and Control
- Hemiptera Insect Studies
- Insect and Pesticide Research
- Insect behavior and control techniques
- Plant Parasitism and Resistance
- Insect Pest Control Strategies
- Berry genetics and cultivation research
- Biological Control of Invasive Species
- Marine animal studies overview
- Weed Control and Herbicide Applications
- Cephalopods and Marine Biology
- Forest Insect Ecology and Management
- Plant Disease Management Techniques
- Entomopathogenic Microorganisms in Pest Control
- Plant and animal studies
- Insect Resistance and Genetics
- Seed and Plant Biochemistry
- Ecology and Vegetation Dynamics Studies
- Soil Science and Environmental Management
- Nematode management and characterization studies
- Marine and coastal plant biology
- Diet and metabolism studies
- Marine Biology and Ecology Research
- Agricultural and Food Sciences
- Ichthyology and Marine Biology
Driscoll Children's Hospital
2018-2024
University of California, Santa Cruz
2008-2023
Cañada College
2015
Universidad San Francisco de Quito
2013
San Jose State University
2004-2006
Universidad Nacional Autónoma de México
1976
A key economic pest of strawberries in California is the western tarnished plant bug, Lygus hesperus Knight (Hemiptera:Miridae). Alfalfa (Medicago sativa L.) a highly attractive host to and we hypothesized that it can be successfully managed as trap crop for suppression strawberries. Completely randomized design cropping experiments were established on an organic strawberry farm from 2002 2004. Western bug adults nymphs significantly more abundant alfalfa crops than comparable edge rows....
Alfalfa (Medicago sativa L.) is a highly attractive plant host to Lygus spp. and used as trap crop in California organic strawberries influence the dispersion dispersal of these pests, particularly hesperus Knight. The abundance distribution nymphs between two crops separated by 50 strawberry rows was analyzed 2008 2010. Nymphs demonstrated bimodal crops, where were most abundant aggregated alfalfa, when compared with interior rows, less abundant. majority concentrated nymphal densities well...
Abstract Three different cotton production strategies [certified organic, conventionally grown, and reduced insecticide input/integrated pest management (IPM)] were compared in field-sized replicates the Northern San Joaquin Valley (NSJV), California, from 1996 to 2001. We measured arthropod abundance, plant development, density, pesticide use, cost of production, lint quality yields three treatments. Overall abundance was low, a key fruit pest, Lygus hesperus Knight, known as western...
Alfalfa trap crops are currently used to manage Lygus spp. in organic strawberry fields on the California Central Coast. The retention of alfalfa creates aggregated distributions that provide improved opportunities for biological control by introduced parasitoid Peristenus relictus (Ruthe). abundance and distribution P. between two separated 50 rows were analyzed 2008 2010. Parasitism nymphs (measured larval % parasitism) was greatest compared with rows. A significantly positive correlation...
Alfalfa (Medicago sativa L.) (Fabales: Fabaceae) can be strategically planted as a trap crop for Lygus spp. in California's organic strawberry fields. has been shown to attract both and, turn, Lygus-specific parasitoid, Peristenus relictus (Ruthe) (Hymenoptera: Braconidae). However, the impact of alfalfa trap-cropped strawberries on predator complex is unknown. Here we identify key predators found strawberry. First, general survey was conducted at an organic, non-trap cropped farm, quantify...
Journal Article How Natural Enemies and Cabbage Aphid (Brevicoryne brassicae L.) Population Dynamics Affect Organic Broccoli Harvest Get access Diego J. Nieto, Nieto 3 1Department of Biological Sciences, San Jose State University, One Washington Square, Jose, CA 95192-0100.2Center for Agroecology Sustainable Food Systems, University California, Santa Cruz, 1156 High Street, 95064. 3Corresponding author, e-mail: grnwll39@aol.com. Search other works by this author on: Oxford Academic PubMed...
A key economic pest of strawberries in California is the western tarnished plant bug, Lygus hesperus Knight (Hemiptera:Miridae). Alfalfa (Medicago sativa L.) a highly attractive host to and we hypothesized that it can be successfully managed as trap crop for suppression strawberries. Completely randomized design cropping experiments were established on an organic strawberry farm from 2002 2004. Western bug adults nymphs significantly more abundant alfalfa crops than comparable edge rows....
Lygus spp. are polyphagous pests that overwinter in weedy vegetation. In the spring on central coast of California, emigrate from weeds into strawberry fields. Subsequent feeding flowers causes fruit deformation precludes sale fresh market. Use alfalfa (Medicago sativa L.) (Fabales: Fabaceae) as a trap crop has been hypothesized to prevent colonization strawberries. We examined movement and associated predators fields with crops using protein mark-capture technique. Insects spiders were...
Abstract The mirid bugs Lygus hesperus (Knight) and L. elisus (van Duzee) are key pests of forage, fiber, fruit crops. Our goals were to identify pheromone components produced by females both species develop practical dispensers for use in monitoring these pests. Volatiles collected from virgin female contained (E)-2-hexenyl butyrate (E2HB) as the major component with lesser amounts hexyl (HB) (E)-4-oxo-2-hexenal (E4OH) (ratio 117.2:100:17.1, respectively), whereas volatiles solvent extracts...
Abstract Alfalfa, Medicago sativa L. (Fabaceae), is a highly preferred host plant of Lygus spp. (Hemiptera: Miridae). As such, intercropping alfalfa trap‐crops in strawberry production can serve as sink for both (primarily hesperus Knight) and its natural enemies. Here we investigated the population dynamics dispersal characteristics generalist predator complex fields with spaced 50 rows (62 m) apart. Predator abundance was determined by counting six focal taxa collected from alfalfa. The...
Abstract Lygus spp. (Heteroptera: Miridae) are serious pests of numerous field and fruit crops in North America. In an effort to reduce crop damage, parasitoids known attack these species Europe were introduced into the USA beginning 1970s. Permanent populations nymphal endoparasitoid Peristenus relictus (Hymenoptera: Braconidae) established at two locations California during 2000s. Both associated with significant reductions lygus bugs attacking alfalfa, commercially produced strawberries...
The surface area of the corpus callosum was measured in several animals as compared to brain weight. A general consideration importance this structure on phylogenetic scale, with special reference dolphin, Stenella graffmani, is given. Some theoretical considerations about significance upon some specialized features are mentioned.
CAL-CORE is a network of researchers, farmers, extension professionals, industry and non-profit organizations dedicated to furthering research into organic strawberry vegetable production in coastal California.Formed 9 years ago, we have worked on variety fertility, pest disease management issues facing growers.Currently, our main effort centers vegetable/strawberry rotations different options for fertility management.In replicated field trial compare treatments across range sustainability...
Delia radium is a root-feeding pest of cole crops. In California, the biocontrol agents associated with D. radicum are not well understood. Soil samples and sentinel pupae were used to assess densities beneficial insects present in cauliflower fields. parasitoids collected from soil included Aleochara bilineata (Coleoptera: Staphylinidae) Aphaereta pallipes (Hymenoptera: Braconidae). Out 10 per sample, an average 2.2 preyed upon when placed on surface, compared only 0.3 buried. Comprehensive...
Abstract Lygus hesperus Knight is a polyphagous pest of major concern to numerous cropping systems across western North America. exhibits well-documented host preferences which may be used develop behavioral management strategies for this pest. This study sought identify plant volatiles that mediate L. and assess the potential those compounds improve monitoring Gas chromatography with electroantennographic detection was applied antennally active in headspace extracts from four plants varying...
Fumigants are often the primary material used to manage plant disease agents, soil-borne arthropods, and weeds in California agriculture, particularly absence of crop rotation. However, some fumigants have come under increased regulatory scrutiny therefore no longer available for use. We tested two biologically based preplant crop-protection fumigant alternatives their effectiveness reducing populations Delia radicum (L.), a insect pest cole crops. Laboratory field tests compared survival...
The parasitoid Peristenus relictus was established in California to help regulate Lygus species. This study surveyed the San Joaquin Valley and South Coast of determine this parasitoid’s current southern geographic range. recoveries were made all sampled counties, including Santa Barbara Ventura along coast, Tulare, Kings Kern inland. Parasitism notably high County, where 61.7% nymphs collected from weedy plants parasitised. However, as parasitism scarce (0–12.5%), future research should...