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Project description

Interaction of Pests with Rice Water Management Practices. (84RI004)
Program UC IPM competitive research grants program
D.E. Bayer, Botany, UC Davis
A.A. Grigarick, Entomology, UC Davis
J.E. Hill, Agronomy and Range Science, UC Davis
R.K. Washino, Entomology, UC Davis
R.K. Webster, Plant Pathology, UC Davis
J.F. Williams, Cooperative Extension, Sutter/Yuba counties
S.C. Scardaci, Cooperative Extension, Colusa County
Host/habitat Rice
Pest Rice Water Weevil; Rice Seed Midges; Tadpole Shrimp; Mosquitos; Unspecified Weeds; Stem Rot Sclerotium oryzae; Aggregate Sheath Spot Rhizoctonia oryzae-sativae; Seedling Disease; Rice Seed Rot
Disciplines Entomology, Plant Sciences, Plant Pathology, Multidisciplinary
Start year (duration)  1984 (Four Years)
Objectives Demonstrate the effect of water depth on growth and competitive ability of weeds on rice growth and development.

Determine the effect of water depth and discontinuous flood on rice water weevil oviposition in relation to plant age and extent of infestation. Investigate leaf scar monitoring as a system for determining need for postplant treatment.

Determine the effect of field drainage after seeding on rice seed midges and/or tadpole shrimp development in relation to rice and weed growth. Determine the effect of water depth management on midge development and infestation level of the rice leafminer.

Demonstrate the effect of water level and discontinuous flood on the survival and developmental rate of mosquito (Culex tarsalis and Anopheles freeborni) larvae as well as invertebrate and vertebrate predators.

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