Pestalotiopsis abietis sp. nov. from Abies fargesii in China

Phytotaxa ◽  
2021 ◽  
Vol 509 (1) ◽  
Author(s):  
MO GU ◽  
DONG-WEI HU ◽  
BING HAN ◽  
NING JIANG ◽  
CHENG-MING TianTIAN

Pestalotiopsis is a common genus worldwide and causes diseases on many plant hosts. During our investigation on plant diseases in Qinling Mountain in China, Pestalotiopsis species on needles of Abies fargesii was discovered. Based on the phylogeny of combined ITS, TEF and TUB genes, three Pestalotiopsis isolates from present study cluster into a distinct clade close to P. parva in the genus. However, conidia of Pestalotiopsis abietis are obviously larger than those from P. parva. Hence, Pestalotiopsis abietis sp. nov. is introduced herein.

2007 ◽  
Vol 240 (1-3) ◽  
pp. 143-150 ◽  
Author(s):  
Haishan Dang ◽  
Mingxi Jiang ◽  
Quanfa Zhang ◽  
Yanjun Zhang

Mycotaxon ◽  
2019 ◽  
Vol 134 (3) ◽  
pp. 463-473 ◽  
Author(s):  
Ling-yu Liang ◽  
Ning Jiang ◽  
Wen-yan Chen ◽  
Ying-mei Liang ◽  
Cheng-ming Tian

During our investigation on plant diseases in Qinling Mountain in China, an oak disease with frogeye leaf spot symptoms was discovered. The associated pathogen was characterised by morphological and molecular approaches and is described here as a new species, Botryosphaeria qinlingensis.


1892 ◽  
Vol 33 (853supp) ◽  
pp. 13635-13636
Author(s):  
Joseph F. James
Keyword(s):  

Author(s):  
K Santhasheela ◽  
Deepan Chakravarthi AV

1970 ◽  
Vol 2 (1) ◽  
pp. 22-32
Author(s):  
Rasiska Tarin

Pengaruh Tingkat Pengetahuan Petani  Pada Resistensi Beberapa Bahan Aktif Insektisida Kimia Untuk Mengendalikan Ulat Plutella Xylostella Skala Laboratorium The Effect of Level Farmers' Knowledge In Some  Active Chemical Insecticides Resistance to Control Plutella Xylostella Scale Laboratory Catur Hermanto, Rasiska Tarigan dan Fatiani Manik Balai Penelitian Tanaman Sayuran – Badan Penelitian dan Pengembangan Pertanian Jln Tangkuban Perahu No 517, Lembang, Bandung Barat 40391; e-mail: [email protected]   ABSTRAK  Petani dan pestisida merupakan dua sisi  yang saling berkaitan dalam mengendalikan serangan hama penyakit tanaman dilapangan Penggunaan pestisida oleh petani semakin hari kian meningkat khususnya didataran tinggi, namun  peningkatan ini tidak diimbangi dengan pemahaman dalam menggunakan pestisida. Penelitian ini bertujuan untuk mengetahui  pengaruh tingkat pengetahuan dan resistensi insektisida yang digunakan petani kubis di kabupaten Karo. Penelitian dilaksanakan di laboratorium Kebun Percobaan Berastagi dengan ketinggian tempat 1.340 mdpl yang dilaksanakan dari bulan september sampai november 2015. Pelaksanaan dibagi 2(dua) tahap. Tahap Pertama mengumpulkan makalah melalui teknik diskusi kelompok petani dan pengencer dan wawancara menggunakan kuisioner. Total jumlah responden 10 orang per 4 kecamatana. Dari hasil kuisioner dipilih jenis insektisida yang sering digunakan petani untuk diuji kepekaan ulat plutella xylostella terhadap insektisida yang diuji pada skala dilaboratoium.  Empat perlakuan dengan masing-masing terdiri atas 9 taraf konsentrasi menggunakan rancangan acak lengkap dan diulang 3 kali. Hasil penelitian menunjukkan  petani kubis dikabupaten karo melakukan pencampuran fungi dan insektisida > 2jenis dengan frekwensi penyemprotan 2 x 1 minggum serta dosis yang digunakan tidak sesuai dengan KF yang dianjurkan. Nilai LC 50 insektisida kimia dari bahan aktif klorantranilipro, prefenofos, sipemetrin dan kloropinofos berturut-turut 1,87 ml, 1,5 ml, 1,5 ml dan 2 ml. Dan waktu Waktu yang dibutuhkan untuk mematikan 50 % plutella xylostella (LT 50) dari keempat insektisida kimia berbahan aktif klorantranilipro, prefenofos, sipemetrin dan Kloropinfos berturut-turut adalah  39.20, 19.43, 23.57 dan 30.15 jam Kata kunci : Pengetahuan, Resistensi, Insektisida Kimia, Plutella xylostella , Laboratorium ABSTRACT. The Farmers and pesticides are important aspects that  interrelated tocontroll pests in the field of plant diseases as well as opportunities occur resistensi. The use of pesticides by farmers is constantly increasing, especially in the highlands, but this increase is not offset by an understanding in the use of pesticides. The aimed of the research to find the knowledge and the use of insecticide resistance cabbage farmers in Karo District.   The research was conducted at the laboratory of Berastagi experimental farm with altitude of 1,340 meters above sea level implemented from the month of September to November 2015. The implementation of divided by 2 (two) stages. The first is to collect  issues by discussion technique of farmers group and diluent and interview using a questionnaire. Total number of respondents  is ten peoples each four districts. From the questionnaire result so the selected types of insecticides often used by famers for the testing of  sensitivity plutella xylostella to insecticides test at laboratory scale with four treatment. each consisting of 9 degree of concentration using a completely randomized design and repeated 3 times. each consisting of 9 degree of concentration using a completely randomized design and repeated 3 times. The results showed cabbage farmers in the county karo mixing fungi and insecticides> 2 types with spraying frequency of 2 x 1 week as well as the doses used did not correspond to the recommended KF. LC 50 value of the chemical insecticide active ingredient klorantranilipro, prefenofos, sipemetrin and kloropinofos successively 1.87 ml, 1.5 ml, 1.5 ml and 2 ml. Time and time required to shut down 50% of Plutella xylostella (LT 50) of the four chemical insecticide active ingredient klorantranilipro, prefenofos, sipemetrin and Kloropinfos are respectively 39.20, 19:43, 23:57 and 30.15 hours


Author(s):  
Dimas Satria ◽  
Poningsih Poningsih ◽  
Widodo Saputra

The purpose of this paper is to create an expert system to detect oil palm plant diseases in order to help farmers / companies in providing accurate information about the diseases of oil palm plants and how to overcome them and to help reduce the risk of decreasing palm oil production. This system is designed to mimic the expertise of an expert who is able to detect diseases that attack oil palm plants. The method used is forward chaining that is starting from a set of data and proving a fact by describing the level of confidence and uncertainty found in a hypothesis. The results of this study are to diagnose diseases of oil palm plants and their computerization using web programming languages.


HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 494f-495 ◽  
Author(s):  
Amy M. Johnson ◽  
Greg D. Hoyt

An experiment was established to determine the effect of different tillage practices, vegetable crop rotations, and pest management strategies on crop yield, plant diseases, pest and beneficial arthropods, weed species changes over time, and soil environmental consequences. This poster describes nitrogen movement from the various treatments over a 3-year rotation. The treatments are: 1) conventional tillage with chemically based IPM; 2) conventional tillage with biologically based IPM; 3) conservation tillage with chemically based IPM; 4) conservation tillage with biologically based IPM; and 5) conventional tillage with no fertilizer or pest management. Mid-season soil analyses with depth showed chemical-fertilized plowed and conservation-tilled treatments with more soil available nitrogen at most depths compared to the biological-based IPM systems (soybean meal was used as a nitrogen source). However, the biological-based systems did supply enough soil nitrogen to produce similar yield results as the chemical-based systems. Less soil nitrate was measured in the 30- to 90-cm depths at harvest from the biological-based systems than chemical-based systems. Conservation-tilled systems had greater nitrate with depth compared to conventional-tilled systems.


1927 ◽  
Vol 19 (6) ◽  
pp. 482-482
Author(s):  
G. N. Hoffer
Keyword(s):  

2012 ◽  
Vol 24 (1) ◽  
pp. 63-66
Author(s):  
Nadja Santos Vitoria ◽  
Maria Auxiliadora Q. Cavalcanti ◽  
José Luiz Bezerra

Sign in / Sign up

Export Citation Format

Share Document