abstract verticillium wilt of olive caused by verticillium dahliae is one of the main constraints to olive production in golestan province. in this research, two defoliating and two non-defoliating isolates of the fungus were inoculated in 16-18 months-old olive seedlings. the seedlings consisted of concervolia, cronaiki, kalamon, zard-roghani, bladi, mission, manzanilla and sevillana. the seed...

Ormiscodes amphimone (Fabricius) is a phytophagous moth species known to severely defoliate woody species in Chile and Argentina. Here we document new records of O. amphimonehost associations emphasizing the role of Nothofagus pumilio as its primary host in our study area. This new record for Argentina is highly significant given the economic importance of N. pumilio as a timber resource and th...

Pumpkins for Halloween usage have become a widely grown crop in Tennessee. This season four fungicide treatments were evaluated for efficacy at The University of Tennessee Plateau Experiment Station at Crossville in 2001. Foliar diseases require a strict spray schedule for effective control. Therefore, a well balanced Integrated Pest Management program for control of mildew and blight diseases ...

Hurricanes are known to affect plants and animals their interactions. Usually, hurricanes defoliate trees reduce the abundance density of arthropods. The parasitic arthropod Holopothrips tabebuia was first reported in Puerto Rico 2006. By 2007, it had established populations on two hosts: Tabebuia aurea heterophylla. In September 2017, Hurricane María defoliated both hosts. This study aimed det...

Alternaria leaf blight is a much greater threat to muskmelons than watermelons. The disease is caused by a fungus (Alternaria cucumerina) that can rapidly defoliate plants, causing reductions in bulk yield. Melons on defoliated vines ripen prematurely and result in lower quality fruit compared to melons produced on healthy vines. Yield losses greater than 50% will occur in situations where the ...

1. The population dynamics of many herbivorous insects are characterized by rapid outbreaks, during which the insects severely defoliate their host plants. These outbreaks are separated by periods of low insect density and little defoliation. In many cases, the underlying cause of these outbreaks is unknown. 2. Mechanistic models are an important tool for understanding population outbreaks, but...

A novel new way to achieve chemical-free defoliation of cotton is discussed. The research found that by severing the phloem tissue on the main stalk, via a girdling operation, the operation stimulated the cotton plant to alter its growth into an early senescence pathway that resulted in the plant shedding its leaves and opening up all its bolls, leaving the plant in the perfect state for machin...

Alternaria leaf blight is a much greater threat to muskmelons than watermelons. The disease is caused by a fungus (Alternaria cucumerina) that can rapidly defoliate plants, causing reductions in bulk yield. Melons on defoliated vines ripen prematurely and result in lower quality fruit compared to melons produced on healthy vines. Yield losses greater than 50% will occur in situations where the ...