Systemic pesticides on walnut: Preliminary studies promising for control of European red mite and walnut aphid in southern California
AuthorJ. C. Ortega
Author AffiliationsJ. C. Ortega is Associate Specialist in Entomology, University of California, Riverside.
Hilgardia 7(10):10-11. DOI:10.3733/ca.v007n10p10. October 1953.
European red mite and walnut aphid in the cool coastal regions of southern California may cause a premature dropping of walnut leaves, predisposing the nuts to sunburn injury and lowering the quality of the nut meats.
Also in this issue:Cotton quotas and allotments: Estimated acreage shifts from cotton to other crops in 1954 as result of expected national allotments
Yellow dwarf disease: A new and damaging virus disease of cereals transmitted by aphids
California's wheat: Most of state's wheat of strains developed by backcross breeding
Natural enemies of olive scale: Aggressive parasitic wasp promising as means of suppressing olive scale in California orchards
Stump grafting old citrus: Navel orange scions set fruit in fifth growing season following grafting to stumps old old seedling trees
Water spot on navel oranges: Only slight injury observed in orchards treated with parathion for California red scale control
Lemon cuttings with fruit rooted: Means of prolonging useful life of lemon fruits developed at Riverside valuable aid in research
Leaf drop in citrus: Excessive fall regardless of cause may lower soluble solids in fruit
Zutano avocado cuttincrs rooted: Leafy-twig cuttings of vigorous Mexican variety 'readily rooted without special procedures or hormone treatments
Chlorosis in ornamentals: Control of lime-induced chlorosis by soil applications of chelated iron can be effective
Rooting bed test: Soil conditioner in nursing bed eased chrysanthemum transplanting
Harvesting sutter pink beans: Effects of field exposure on change of color may be reduced by early harvesting and threshing
Reproduction without males in aseptic root cultures of the root-knot nematode
Development of the root-knot nematode as affected by temperature