The foreign Ento-Dephol showed high result with 30-40% of guza couses opened using 0.200 litres defoliation for each hectare in view to defoliate cotton artificially. 7.0 ensured better compared other alternatives. It is explained which defoliant best used opening buds. In the second stage (50-60% when cocoons opened), effectiveness defoliants proved be high, and yield appeared excessive owing ...

Black spot is one of the most destructive diseases roses, causing premature defoliation, thus progressively weakening plant and even leading to death. This study aimed at identifying pathogen black on Rosa chinensis Jacq. cv. nhung (Hồng Nhung) R. var. minima Tỉ Muội) in Sa Đéc city, Đồng Tháp province, Vietnam, using a combination conidia morphology pathogenicity tests including detached leaf ...

The spines of flowering plants are thought to function primarily in defence against mammalian herbivores; however, we previously reported that feeding by Manduca sexta caterpillars on the leaves of horsenettle plants (Solanum carolinense) induces increased development of internode spines on new growth. To determine whether and how spines impact caterpillar feeding, we conducted assays with thre...

New Zealand's forest plants evolved in the absence of mammalian herbivores, but subject to the attentions of a variety of other animals. Insects are and probably were, the primary folivores, but birds may also have been important. Several extinct birds, notably moas (Dinornithidae), were herbivores, and speculation continues about their impact on the vegetation. Among existing forest birds, bot...

As drought-induced tree defoliation and mortality (i.e. decline) in the Mediterranean is expected to worsen with ongoing climate change, it of paramount importance understand how, why, when decline affects soil respiration (Rs). We carried out a novel study exploring interacting effects climatic variability season year) on water content (SWC), temperature (Tsoil), Rs temporal holm oak woodland....

Passerine birds use a variety of indirect cues to make territory location decisions. These birds can also distinguish herbivore-damaged plants from undamaged ones during foraging, even when they cannot see the herbivorous larvae or damaged leaves. To test the possibility that also the territory choice of passerines is affected by herbivoreinduced plant cues, we established territories with and ...

Larvae of the whitemarked tussock moth, Orgyia leucostigma (J.E. Smith) (Lepidoptera: Lymantriidae), defoliate and contaminate blueberries, Vaccinium corymbosum L., in eastern North America, but infestations are often not detected until economic damage has been caused. To improve monitoring techniques and understand the phenology of the whitemarked tussock moth in blueberry, we compared four tr...

The concept of planting trees in widely spaced rows and growing cash crops in the alleyways is a special form of agroforestry called alley cropping. To be successful, the companion crop’s physiological requirements (i.e., light, water and nutrients) must be accommodated by the tree. Black walnut’s (Juglans nigra L.) foliage and root system are unique and readily adapted to the growth of compani...

The flea beetle Aphthona whitfieldi Bryant (Coleoptera: Chrysomelidae) is the main pest of the bioenergy crop Jatropha curcas L. (Euphorbiaceae) in Burkina Faso and several other West African countries. Adults severely defoliate plants, resulting in seedling mortality, poor growth, and low yields. To study the population dynamics of the pest in the Sissili Province of Burkina Faso, 12 sites wer...

We examined the threat status of the low tree Pittosporum patulum throughout its range in eastern South Island, based on plot-based sampling of habitat, defoliation by mammalian herbivores, demographic and dieback characteristics. Using environmental modelling (Land Environments of New Zealand), we found no explanation for the ‘gap’ in its disjunct distribution from Nelson–Marlborough–north Can...