Fall Army Worm is a new insect in Bangladesh. The people will able to know how it is attack, its harmful effect etc.it is very dangerous insect for our crop cultivation. It is capable to destroy our crops totally.
Fall Army Worm is a new insect in Bangladesh. The people will able to know how it is attack, its harmful effect etc.it is very dangerous insect for our crop cultivation. It is capable to destroy our crops totally.
Types and Percentations of Parasitization Egg Parasitoids Spodoptera frugiper...AI Publications
Corn (Zea mays L) is the main commodity of agricultural crops in Indonesia. There are two groups of corn that are cultivated, namely ordinary corn (food corn) and sweet corn. Food corn is mainly used as a raw material for making food, which is used as a raw material for making animal feed raw materials and other industrial products. Easy cultivation, can grow in various conditions, stable selling prices and easy to market are the main driving force for high interest of the farming community to cultivate it. Spodoptera frugiperda larvae are polyphagous and attack many plant species. S. frugiperda larvae feed on more than 350 species of plants in 76 families. S. frugiperda is a typical migratory pest and this migratory behavior is an adjustment strategy to find a more profitable habitat. S. frugiperda is one of the most dangerous invasive pests due to its short life cycle. An adult female lays 900 – 1200 eggs in her life cycle. The purpose of the study was to inventory and analyze the egg parasitoid of S. frugiperda and the percentage of parasitization The analysis of the types of egg parasitoids of S. frugiperda was carried out through an inventory and identification process, while the percentage of parasitization was carried out using a randomized block design consisting of 5 treatment groups of eggs from 5 regions and three replications. The results of the inventory and identification contained two types of parasitoids, namely: Telenomus sp. and Trichogramma sp. The highest percentage of total parasitization was from Manado City at 85% and the lowest was from Bolaang Mongondow at 5%. Telenomus sp. higher percentage of parasitization than Trichogramma sp. Parasitization percentage of Telenomus sp. on eggs of S. frugiperda the highest came from Manado by 63% and the lowest came from Tomohon by 3%, while the percentage of parasitization of Trichograma sp. The highest came from Manado at 22%, and the lowest came from Bolaang Mongondow Regency at zero percent. In conclusion, there are 2 types of egg parasitoids in S. frugiperda eggs, namely the parasitoid Telenomus sp and the parasitoid Trichogramma sp., the percentage of parasitization of Telenomus sp. on eggs of S. frugiperda the highest sample from Manado and the lowest sample from Tomohon. Percentage of parasitization of Trichograma sp. the highest sample of S. frugiperda eggs from Manado, and the lowest sample from Bolaang Mongondow.
Identification and Evaluation of Bacterial Blight Occurrence on Guar Crop in ...ijtsrd
Guar crop grown in Gadarif State is attacked by leaf blight disease. Therefore, a disease survey in season 2014 and field experiments for examination of six sources of guar seeds in season 2015 respectively conducted in southern and northern geographical areas of Gadarif State to identify and evaluate the incidence of the disease. The results indicated that this disease is caused by bacterial disease identified as Xanthomonas spp. The disease survey in farmer fields revealed that, all guar grown in southern area at locations of Azaza, Samsam and Saraf Saeed was almost infected by the disease. The findings of the field experiment in southern geographic area indicate that, the disease incidence percent ranged between 37.5 to 47.3 , whereas the disease severity is reached up to 100 resulting in complete crop damage. However, in the northern area the disease was quite negligible with an average of 2.1 . The six sources of guar seeds at northern area, gave highest yield ranged between 234.8 to 214.5 kg fed compared to those tested in southern geographical area of Gadarif state which were gave a very few numbers of capsules. This study indicated that, the epidemic occurrence of the bacterial blight disease on guar crop is almost associated with the amount of high rather than the relatively low amount of rainfall areas of production of guar. Elsafi Mustafa Mohamed | Muna E. Suliman. | Mohamed Ibrahim Ismail "Identification and Evaluation of Bacterial Blight Occurrence on Guar Crop in Gadarif State (Sudan)" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-4 | Issue-3 , April 2020, URL: https://www.ijtsrd.com/papers/ijtsrd30662.pdf Paper Url :https://www.ijtsrd.com/medicine/other/30662/identification-and-evaluation-of-bacterial-blight-occurrence-on-guar-crop-in-gadarif-state-sudan/elsafi-mustafa-mohamed
Foliar Nematode Problem of Crops in West Bengal & its ManagementPuspendu Samanta
Foliar nematodes are the plant parasitic nematodes of the genera Aphelenchoides, Ditylenchus, Anguina and Subanguina, Nothanguina etc. The most economically important nematode species under the genus Aphelenchoides are A.besseyi, A. ritzemabosi and A. fragariae. Ditylenchus angustus an important causal agent of ‘ufra’ disease of rice. Anguina tritici is also an important nematode causing ‘ear cockle’ disease of wheat. Subanguina agropyri is causing galls to the bases of grasses. Anguina tritici and Subanguina agropyri are not of much concern for their occurrence and crop loss in the West Bengal. Foliar nematodes, Aphelenchoides spp. in particular are becoming a widespread and serious problem for the rice, onion, strawberry, flowering and ornamental crops. It is a severe problem to nursery industry. A. fragariae causes damage on hundreds of different plants including chrysanthemum, begonia, gloxinia, African violet, cyclamen, and a wide variety of bedding plants and ferns, causing brown to black, vein-delimited lesions on leaf tissue, defoliation, and stunting of plants.
Radiosensitivity and Seedling Growth of Several Genotypes of Paddy Rice Mutan...AI Publications
Researchers use mutation induction in rice to create high genetic diversity. The basic population with high genetic diversity will facilitate the selection process for the desired good characters. This study aimed to determine the optimal dose that induces the highest genetic diversity in four lowland rice genotypes. The research materials were four genotypes of lowland rice, namely “G10”, “G16”, “Baas Selem”, and “Inpago Unram-1”. Gamma irradiation was carried out at the Center for Isotope and Radiation Application (PAIR) BATAN. Each genotype was irradiated at doses of 200, 300, 400 and 500 Gy. The seeding is done in the glasshouse of the Faculty of Agriculture, University of Mataram. Observations were made on the number of growing seeds, plant height and number of leaves. The LD50 value was determined based on the results of the regression analysis of the number of growing seeds at the four irradiation doses plus control (0 Gy). The results indicated that (1) the numbers of growing seeds decreased as the doses of gamma irradiation increased, (2) the LD50 value of the four rice genotypes ranged from 264 to 518 Gy, (3) the optimal dose of gamma ray irradiation for G10, G16, Baas Selem, and Inpago Unram-1 were 264 Gy, 398 Gy, 316 Gy and 518 Gy, respectively. (4) Among the four rice genotypes teasted, “G10” mutant was the most sensitive to gamma ray irradiation, whereas” Inpago Unram-1” mutant was the least sensitive genotype.
1. Jamie Klein FINAL VERSION—READY TO EDIT
Process Brief
Revision 3
April 12, 2010
Sorghum Downy Mildew
Small white downy splotches or light and dark streaks of green on sorghum leaves are
disconcerting to farmers and scientists because they point to sorghum downy mildew, an
infectious disease that reduces the amount of grain produced by a field of sorghum.
Growing sorghum that resists downy mildew is a goal the International Sorghum and
Millet Collaborative Research Support Program (INTSORMIL) hopes to achieve through its
worldwide research efforts.
Sorghum is internationally grown, and according to INTSORMIL reports, is an African
dietary staple.
Farmers in Africa grow sorghum to feed their families and livestock, so downy mildew’s
ability to reduce the crop’s yield is a major concern, said Gary Odvody, an associate professor
with Texas A&M Research and Extension Center who also works with INTSORMIL.
The fungus is borne in soil and, if sorghum plants aren’t around to be infected, remains in
the ground between farming seasons, Odvody said. When a susceptible sorghum plant is nearby,
spores from the fungus infect sorghum plant roots and grow with the plant.
Sorghum sprouts out of the ground about a week after it is planted, he added.
Symptoms of downy mildew, including multi-colored leaves with fuzzy white spots
underneath, are noticeable three or four weeks after the sorghum is planted, Odvody said.
“We look at it as a mosaic pattern of light-colored cells and green cells of the host,” he
said.
2. The leaves may also have alternating parallel stripes of green and yellowish-green to
white tissue; and leaves with the lighter stripes eventually die, according to a University of
Nebraska-Lincoln Department of Plant Pathology Web site.
Infected plants probably die without producing any grain, Odvody added.
INTSORMIL sorghum breeders are growing sorghum from various genetic backgrounds
and testing them for downy-mildew resistance, Odvody said. If sorghum breeders can identify
which types of sorghum are resistant then it’s possible to create resistant hybrids for farmers to
use around the world.
And for that reason, Odvody said sorghum downy mildew is an “internationally
important disease.”
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