Alternaria yali-inficiens (chocolate spot of Ya Li pear).

2021 ◽  
Author(s):  
Keyword(s):  
Filamentous Fungus ◽  
Pear Fruit ◽  
Fruit Growing ◽  
Chocolate Spot ◽  
Agricultural Plants

Abstract A. yali-inficiens is an asexually reproducing, filamentous fungus known only since its isolation in 2001 from infections on fruit of Ya Li pears (Pyrus bretschneideri), exported from a certain region of China. Although most species of Alternaria are air-disseminated, its ability to spread and establish in other temperate fruit-growing regions is not known. This fungus may pose a threat to native or agricultural plants if introduced. Some countries importing pear fruit from China have established regulatory precautions against it.

scholarly journals Infection of ‘d'Anjou’ Pear Fruit by Potebniamyces pyri in the Orchard in Relation to Phacidiopycnis Rot during Storage

Plant Disease ◽  
2009 ◽  
Vol 93 (10) ◽  
pp. 1059-1064 ◽  
Author(s):  
Q. Liu ◽  
C. L. Xiao
Keyword(s):  
Chemical Control ◽  
Growing Season ◽  
The United States ◽  
Fruit Rot ◽  
Pear Fruit ◽  
Growing Seasons ◽  
Naturally Occurring ◽  
Fruit Growing ◽  
Rot Disease ◽  
Decay Development

Phacidiopycnis rot, caused by Potebniamyces pyri, is a recently recognized postharvest fruit rot disease of ‘d'Anjou’ pear (Pyrus communis) in the United States. To determine the timing of fruit infection in the orchard in relation to incidence of Phacidiopycnis rot during storage, fruit were inoculated in the orchard at different times during the growing season, harvested, and monitored for decay development during storage at 0°C. Fruit inoculated in the field and laboratory were also used to determine the infection courts and the importance of necrotic tissues to infection of sepals that may lead to calyx-end Phacidiopycnis rot. Phacidiopycnis rot was observed during cold storage on the fruit inoculated any time after bloom till near harvest but not on the fruit inoculated during bloom. Phacidiopycnis rot symptoms only developed at the stem and calyx end of the fruit during storage. Relatively more calyx-end rot was observed than stem-end rot on the fruit inoculated before August. Incidence of stem-end rot increased significantly on the fruit inoculated near harvest. Incidence of total Phacidiopycnis rot increased as the timing of fruit infection in the orchard approached harvest. Potebniamyces pyri was recovered more frequently from sepals than from styles and stamens of the fruit. Most infections on sepals were associated with the necrotic tissues. Naturally occurring necrotic tissues occurred on more than 85% and all sepals in the early fruit-growing and late growing seasons, respectively. Such necrotic tissues on sepals could serve as potential infection sites for P. pyri. The results may suggest that chemical control of Phacidiopycnis rot should focus on protecting the pedicel (stem) and floral parts of fruit and that fungicides applied near harvest are likely most important in controlling latent infections of pear fruit by P. pyri leading to Phacidiopycnis rot during storage.

Agricultural Plants

1991 ◽  
Author(s):  
R. H. M. Langer ◽  
G. D. Hill
Keyword(s):  
Agricultural Plants

Fruit Growing

1884 ◽  
Vol 17 (433supp) ◽  
pp. 6917-6918
Author(s):  
P. H. Foster
Keyword(s):  
Fruit Growing

Worker Protection Standard: Owner and Immediate Family Exemption

EDIS ◽  
2016 ◽  
Vol 2016 (7) ◽  
Author(s):  
Frederick M. Fishel ◽  
Tatiana Sanchez
Keyword(s):  
Direct Contact ◽  
Family Members ◽  
Agricultural Workers ◽  
Federal Regulation ◽  
Fact Sheet ◽  
Agricultural Plants

The Worker Protection Standard (WPS) is a Federal regulation designed to protect agricultural workers (people involved in the production of agricultural plants) and pesticide handlers (people mixing, loading, or applying pesticides or doing other tasks involving direct contact with pesticides).There are certain exemptions in the WPS rule that have been revised pertaining to agricultural establishment owners and their immediate family members. This fact sheet explains these new provisions.

Worker Protection Standard: Information at a Central Location

EDIS ◽  
2016 ◽  
Vol 2016 (7) ◽  
Author(s):  
Frederick M. Fishel ◽  
Tatiana Sanchez
Keyword(s):  
Direct Contact ◽  
Agricultural Workers ◽  
Specific Information ◽  
Federal Regulation ◽  
Central Location ◽  
Agricultural Pesticides ◽  
Full Implementation ◽  
Standard Information ◽  
Agricultural Plants ◽  
General Guidance

The Worker Protection Standard (WPS) is a Federal regulation designed to protect agricultural workers (people involved in the production of agricultural plants) and pesticide handlers (people mixing, loading, or applying pesticides or doing other tasks involving direct contact with pesticides). It has been in full implementation since 1995. This document provides general guidance to help you comply with the requirements of the Federal Worker Protection Standard (WPS) for agricultural pesticides, 40 CFR part 170, as amended in 2015. This document addresses specific information that agricultural establishments must display at a central location for their employees.

SPECIES, HOST RANGE, AND IDENTIFICATION KEY OF WHITEFLIES OF BOGOR AND SURROUNDING AREA

2019 ◽  
Vol 18 (2) ◽  
pp. 127
Author(s):  
Purnama Hidayat ◽  
Denny Bintoro ◽  
Lia Nurulalia ◽  
Muhammad Basri
Keyword(s):  
Host Range ◽  
Host Plants ◽  
Ornamental Plants ◽  
Identification Key ◽  
Agricultural Crops ◽  
Surrounding Area ◽  
Aleurodicus Dispersus ◽  
Agricultural Plants ◽  
Surrounding Areas ◽  
Forest Plants

Species identification, host range, and identification key of whiteflies of Bogor and surrounding area. Whitefly (Hemiptera: Aleyrodidae) is a group of insects that are small, white, soft-bodied, and easily found on various agricultural crops. Whitefly is a phytophagous insect; some species are important pests in agricultural crops that can cause direct damage and can become vectors of viral diseases. The last few years the damage caused by whitefly in Indonesia has increased. Unfortunately, information about their species and host plants in Indonesia, including in Bogor, is still limited. Kalshoven, in his book entitled Pest of Crops in Indonesia, published in the 1980s reported that there were 9 species of whitefly in Indonesia. The information on the book should be reconfirmed. Therefore, this study was conducted to determine whitefly species and its host plants in Bogor and its surroundings. Whiteflies is identified based on the ‘puparia’ (the last instar of the nymph) collected from various agricultural plants, ornamental plants, weeds, and forest plants. A total of 35 species of whiteflies were collected from 74 species and 29 families of plants. The collwcted whiteflies consist of four species belong to Subfamily Aleurodicinae and 31 species of Subfamily Aleyrodinae. The most often found whitefly species were Aleurodicus dispersus, A. dugesii, and Bemisia tabaci. A dichotomous identification key of whiteflies was completed based on morphological character of 35 collected species. The number of whitefly species in Bogor and surrounding areas were far exceeded the number of species reported previously by Kalshoven from all regions in Indonesia.

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