Environ.Entomol.21(2):264-268(1992) ABSTRACT Soybean, Glycine max (L.) Merr., resistance to insects has been shown to vary with planting date and leaf age. This study determined effects soybean genotype, planting date, and leaf age had on feeding behavior of com earworm, Helicoverpa zea (Boddie). Soybean genotypes 'Cobb' (susceptible) and 'GatIR81-296' (resistant) were planted early (29May) and...

The influence of the vesicular-arbuscular mycorrhizal fungus Glomus intraradices (Gi) and superphosphate (P) on penetration, development, and reproduction of Meloidogyne incognita (Mi) was studied on the Mi-susceptible cotton cultivar Stoneville 213 in an environmental chamber at 28 C. Plants were inoculated with Mi eggs at planting or after 28 days and destructively sampled 7, 14, 21, and 28 d...

Aims: Vitis vinifera is a grape species and native to the Mediterranean region and east to northern Iran. The present research was carried out in greenhouse conditions to study the effects of four concentrations of indole-3-butyric acid (IBA) (0; 2000; 4000; and 6000 mg/l) and three planting beds (agricultural soils, sandy, and mixture of agricultural soils and sand) on rooting grape cuttings i...

Studies simulating the large-scale afforestation of African Sahel constantly find warning signals increased risk extreme temperatures and heatwaves resulting from changes in albedo latent heat flow. We review measures underlying three simulation studies, together with a restoration model which compartments are formed by greenbelts to enable succession savanna vegetation, protected hot wind drou...

Agroforestry practices can improve the adaptive capacity and resilience of local farming and subsistence systems while providing livelihood benefits to households. However, scaling up of agroforestry technology has often proved difficult. Many studies have been carried out to explain the lack of tangible impact, based mainly on formal household/farm surveys comparing characteristics of non-adop...

The light deficiency in the canopy is not the main factor limiting maize (Zea mays L.) production but the lower radiation use efficiency (RUE). Conservation tillage planting patterns were used to construct a sustainable agricultural system for soil protection and higher RUE. On these bases, we tried to create more uniform light distribution in crop canopy for increasing radiation use efficiency...

On global scale, community participation in various activities is the core in the quest for sustainable development and environmental protection related issues. Community involvement in tree planting in Kenya is as old as modern agroforestry that started in 1971. However, certain biophysical environmental factors have not worked against the concept of community participation in tree planting. A...

Experiments were conducted at the CSIR-Crops Research Experimental station at Kumasi, Ghana, to determine the effects of seed sorting and planting device on yield of maize in the 2014 major growing season. Two jab planters were used to plant sorted and unsorted seeds. The control treatment was cutlass planting of unsorted seed. One of the jab planters was imported from China; and the other was ...

Eggs of Meloidogyne arenaria race 1 were encapsulated in calcium alginate for use as inoculum to infest peanut field plots. Some eggs within the capsules remained viable up to 10 weeks after preparation. A field site was successfully infested at peanut planting and (or) 6 weeks later. Dual applications of nematode inoculum (at planting and 6 weeks later) were superior to single applications (at...