Seasonal Incidence and Effect of Abiotic Factors on Population Dynamics of Tobacco Caterpillar, Spodoptera litura (Fabricius) on Groundnut (Arachis hypogaea L.) During Rabi Season

2017 ◽  
Vol 5 (5) ◽  
pp. 287-292
Author(s):  
T. Naresh ◽  
Keyword(s):  
Population Dynamics ◽  
Arachis Hypogaea ◽  
Spodoptera Litura ◽  
Abiotic Factors ◽  
Rabi Season ◽  
Seasonal Incidence ◽  
Arachis Hypogaea L ◽  
Tobacco Caterpillar

scholarly journals UJI EFIKASI EKSTRAK DAUN MAHONI (Swietenia mahagoni (L.) Jaqc.) TERHADAP HAMA ULAT GRAYAK (Spodoptera litura F.) DAN HASIL TANAMAN KACANG TANAH (Arachis hypogaea L.)

2020 ◽  
Vol 20 (2) ◽  
pp. 135-142
Author(s):  
Endang Suprapti ◽  
Dwi Susilo Utami ◽  
Tyas Soemarah K.D ◽  
Haryuni
Keyword(s):  
Arachis Hypogaea ◽  
Active Ingredient ◽  
Spodoptera Litura ◽  
Time Interval ◽  
Biological Resources ◽  
Arachis Hypogaea L ◽  
And Control ◽  
Swietenia Mahagoni

Indonesia has a huge, biological resources as a plant which can be used as a pesticide natural mahogany. The plant pesticide vegetable is pesticide, plant are based with the active ingredient and control of organism. Obstacles in cultivation of plant peanuts is Spodoptera litura F. pest attacks. Which result in a decrease in productivity and seeds being broken. The  purpose of  this  evaluation  to  understand  the  influence  of  extract mahogany leaves and  intensity of attacks against the  percentage caterpillar  in plants peanut , to know intervals of time the application of appropriate to reduce the percentage of and intensity of pest attacks , and to know the influence of the interaction of concentration and intervals of time application extract mahogany leaves. This research in a random complete the group consisting of two factors.The first concentration extract leaves mahogany and the second factor intervals of time application .But the research referred to as follows 1 ) the first , the extract leaves mahogany (A) : A0: 0 % (control),  A1 : 8% , A2 : 10%, A3: 12% , 2) factors second , the time interval application (B): B1: every day once upon 3 , B2 : every day once upon 5, B3 : every day once upon 7. Every treatment repeated 3 times. The results of the study show concentration extract leaves mahogany to reduce caterpillar grayak pest  attacks   .Extract  leaves  mahogany with  intervals of time the application  had an influence on the percentage and intensity of pest attacks caterpillar and influential on the parameter the  results  of  .The  percentage  of  highest  attack  A0B3   38,05  %  the  lowest percentage A3B1  3,91 % as much as . For the intensity of the attack highest A0B3 25,77 % and the lowest A3B1 13,76 % as much as .The results of fresh pods peanut the highest A3B1  (6,0608 t /ha) and the lowest A1B3  with the results of (0,5431 t /ha).

Population dynamics of aphid, Myzus persicae (Sulzer)(Hemiptera: Aphididae) on different Brassica species

2017 ◽  
Author(s):  
Joni Kumar ◽  
Bishwajeet Paul
Keyword(s):  
Population Dynamics ◽  
Abiotic Factors ◽  
Correlation Coefficients ◽  
Brassica Species ◽  
Significant Negative Correlation ◽  
Aphid Population ◽  
Maximum Temperature ◽  
Rabi Season ◽  
Rapid Multiplication ◽  
Weather Parameters

Present studies deal with continuous observation of aphid population on different brassica species at every fourteen days interval. Five plants were selected randomly from each plot. The top 10cm terminal portion was used for counting of aphid population. The first appearance of aphid population was found at end of December in Brassica rapa var toria, B. rapa var yellow sarson and Brassica juncea. The correlation coefficients between aphid population and abiotic factors revealed contradictory results. Except for a few instances the abiotic parameters show a low order of association with aphid population. A significant negative correlation of aphid population was found with maximum temperature in B. rapa var toria (r= -0.963**), B. rapa var yellow sarson (r= -0.877*) and B. juncea (r= -0.913*). The population dynamics study of coccinellid beetles revealed that its population increased gradually with the increase of aphid population and vice-versa. In our experiment none of the weather parameters alone was responsible for the multiplication and growth of the aphid but it is assumed that during major part of rabi season, the meteorological parameters remained conducive for the rapid multiplication of aphid.

Dry matter production, yield and yield components of groundnut (Arachis hypogaea L.) genotypes as influenced by zinc and iron through ferti-fortification

2017 ◽  
Vol 51 (04) ◽  
Author(s):  
Sai Surya Gowthami V. ◽  
Ananda N.
Keyword(s):  
Arachis Hypogaea ◽  
Yield Components ◽  
Dry Matter ◽  
Kernel Weight ◽  
Production Yield ◽  
Dry Matter Production ◽  
Rabi Season ◽  
Matter Production ◽  
Arachis Hypogaea L ◽  
Yield And Yield Components

A field experiment on deep black soils during rabi season of 2014-15 to study the influence of ferti-fortification on dry matter production, yield and yield components viz., number of pods plant-1, pod weight, 100 kernel weight and shelling percentage of groundnut genotypes. Among groundnut genotypes, ICGV-00351 recorded significantly higher pod, kernel and haulm yield (2656, 1934 and 2894 kg ha-1, respectively), dry matter production at harvest (36.54 g plant-1), number of pods plant-1 (33.66), pod weight (31.81 g plant-1), 100 kernel weight (31.59 g) and shelling percentage (72.77 %) as compared to other genotypes. Among micronutrients application, higher dry matter production at harvest (43.60 g plant-1), pod, kernel and haulm yield (2789, 2051 and 3080 kg ha-1, respectively), number of pods plant-1 (34.08), pod weight (32.25 g plant-1), 100 kernel weight (31.61 g) and shelling percentage (73.21 %) recorded with soil (25 kg ha-1) and foliar (0.5 %) application of ZnSO4 (S4) as compared to control.

Population dynamics of major defoliators (semiloopers and tobacco caterpillar) in soybean crop

2016 ◽  
Author(s):  
S. Ramesh Babu ◽  
Prahlad Kumar Meena ◽  
Ramgopal Dudwal
Keyword(s):  
Population Dynamics ◽  
Spodoptera Litura ◽  
Pheromone Trap ◽  
Peak Activity ◽  
Weather Factors ◽  
Larval Population ◽  
Soybean Crop ◽  
Weather Parameters ◽  
Trap Catches ◽  
Tobacco Caterpillar

A study was carried out to find out the effect of various weather parameters on the occurrence of major defoliators in soybean crop. Semilooper larval population was recorded late July/early August and their peak activity observed during 33-34, 33-36 and 37-39 standard weeks, in 2012, 2013 and 2014, respectively. Among the weather factors, morning relative humidity showed significant (r=0.954) and positively, highly influence on the larval population per mrl whereas evening humidity (r=-0.644) and sunshine hrs (r=-0.367) negatively and significantly influence the larval population per mrl. The various weather parameters significantly caused 92 per cent variations in larval population per mrl. The moth catches of Spodoptera litura increased from late-August to late-September and this trend was almost similar in different kharif seasons observed. Larval population of S. litura positively correlated with pheromone trap catches during 2014.

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