Defoliation and Infestation of Cucurbita pepo Genotypes by Diabroticite Beetles
نویسندگان
چکیده
منابع مشابه
Floral transmission of Erwinia tracheiphila by cucumber beetles in a wild Cucurbita pepo.
Cucumber beetles, Acalymma vittatum (F.) and Diabrotica undecipunctata howardi (Barber), are specialist herbivores of cucurbits and the vector of Erwinia tracheiphila (E.F. Smith) Holland, the causative agent of wilt disease. Cucumber beetles transmit E. tracheiphila when infected frass falls onto leaf wounds at the site of beetle feeding. We show that E. tracheiphila also can be transmitted vi...
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Lateral roots of intact summer squash seedlings (Cucurbita pepo L.) were used to quantify the effects of boron deficiency on DNA synthesis, protein synthesis, and respiration. The temporal relationship between changes in these metabolic activities and the cessation of root elongation caused by boron deprivation was determined. Transferring 5-day-old squash seedlings to a hydroponic culture medi...
متن کاملDistribution of a - Galactosidase in Cucurbita pepo
The distribution of a-galactosidase (a-D-galactoside galactohydrolase IEC 3.2.1.221) in Cucurbita pepo has been determined in an attempt to assess its involvement in hydrolysis of transport sugars of the raffinose oligosaccharide series (la-1-6-galactopyranosyllj sucrose). Extracts prepared from leaves and petioles at different stages of development, roots, flowers, dry and germinating seeds, a...
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The characteristic bitter substances of the Cucurbitaceae act as kairomones for a large group of diabroticite beetles (Chrysomelidae, Galerucinae, Luperini), promoting host selection and compulsive feeding behavior. These beetles (e.g., Diabrotica undecimpunctata howardi) respond to as little as 1 ng of cucurbitacin (Cuc) B on thin-layer plates by arrest and compulsive feeding. Six species of d...
متن کاملReview of Cucurbita pepo (Pumpkin) its Phytochemistry and Pharmacology
Abstract Cucurbita pepo, is widely used like food and in folk medicine around of the world. This aims a comprehensive of the pharmacological, chemical constituents, and clinical uses. Also have been identified the medicinally important phyto-constituents belonging mainly to cucurbitosides, multiflorane-type triterpenoids, carotenoids, ent-kauranetype diterpene, and cucurbitaglycosides. Extracts...
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ژورنال
عنوان ژورنال: HortScience
سال: 1996
ISSN: 0018-5345,2327-9834
DOI: 10.21273/hortsci.31.3.439