We report the characterization and cDNA cloning of two alpha-amylase isozymes from larvae of the Western corn rootworm (Diabrotica virgifera virgifera LeConte). Larvae raised on artificial media have very low levels of amylase activity, and much higher levels are found in larvae raised on maize seedlings. At pH 5.7, the optimum pH for enzyme activity, the alpha-amylases are substantially but no...

Plant extracts, made by grinding 2 g of fresh tissue in 5 ml of water, were toxic to Tylenchorhynchus dubius and Hoplolaimus spp. Such extracts from leaves and stems of bean (Phaseolus vulgaris L.) and leaves of tobacco (Nicotiana tabacum L.) were most toxic; those from leaves of corn (Zea mays L.), tomato (Lycopersicon esculentum Mill.) and rhododendron (Rhododendron catawbiense L.) were less ...

Native granular starches (corn, cassava,mung bean, and sago) were hydrolyzed using amixture of alpha-amylase and glucoamylase at 35 ◦C for 24h. Hydrolyzed starches were analyzed for the degree of hydrolysis and for physicochemical and functional properties. Corn starch showed the highest degree of hydrolysis, as evidenced by the presence of distinct pores penetrating deep into the granules. Enz...

BACKGROUND Multiple applications of pyrethroid insecticides are used to manage European corn borer, Ostrinia nubilalis Hübner, in snap bean, but new diamide insecticides may reduce application frequency. In a 2 year small-plot study, O. nubilalis control was evaluated by applying cyantraniliprole (diamide) and bifenthrin (pyrethroid) insecticides at one of three phenological stages (bud, bloom ...

The Rag1 gene confers antibiotic resistance to soybean aphid, Aphis glycines Matsumura (Hemiptera: Aphididae), and in 2010, varieties expressing Rag1 were released for commercial use in the United States. We do not know how Rag1 varieties will influence the broader community of defoliating insects that inhabit soybean fields. In 2010 and 2011, the preference and performance of pest insects that...

ABSTRACT This work aimed to evaluate the phytotechnical performance of succession involving pre-croppings maize and Mucuna pruriens (velvet bean) or intercropping these species in agroecological cultivation broccoli presence absence fermented compost fertilization. The experimental design was randomized blocks a factorial scheme 2 (maize monoculture intercropped with velvet x (absence fertiliza...

The goal of this investigation was to establish an initial correlation between farming activities and malaria and to define risk factors and prevalence of the latter through an analysis of the integration of farm production strategies by members of an indigenous peasant community in the Chiapas mountains in Mexico. Information was obtained on places of work, land use, coffee, corn, and bean far...

In 1943 AMLONG (1) reported an increase in the transpiration of Cooper's Ernite tomato plants grown from seeds that had been soaked for 24 hours in a solution containing 100 mg. of potassium naphalene acetate, 100 mg. of ascorbic acid and 2000 mng. of thiourea per liter of water. Three years later, BROWN (2) investigating the effect of 2,4-Dichlorophenoxyacetic acid (1000 p.p.m.) on the water r...

intercropping is one of the management methods for crop production and leads to improvement of resource absorption and use by plants. based on this purpose the present field study was conducted to evaluate radiation absorption and uses efficiency in corn and bean strip intercropping at the farm of the faculty of agriculture, ferdowsi university of mashhad, iran during 2009. the experiment was s...

ABSTRACT This study aimed to evaluate sweet potato performance in succession annual herbaceous leguminous plants, monocropping or intercropped with corn, under agroecological management, Baixada Fluminense conditions. The experimental design was randomized blocks, five treatments and four replicates. consisted of pre-cropping the following species: crotalária (Crotalaria juncea) system, corn (Z...