Proceedings of the Fifth Asian Regional Maize Workshop - Search ...

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Long term evaluation of mass releases of T. ostriniae show they have suppressed the corn borer population density from 7.2 male moths captured per virgin female trapped in 1985 to 4.5 male moths per trap in 1991, in Potzu, Chiayi area, Taiwan (Fig. 4 & 5). 35,---------------------- 30 f 25 ... ". ! ;. 20 •.. - 0-. t-; t~ :: o II 15 ... ~ 10 o C : T.mp ~ ~: No. 01 mal, 1I0th. c.ptured 5r-----+--H-+--f-1...--:--A:-+-J.l--..:....J~A__/_-U_l Fig. ~. Seasonl' population fluctultlon of th, Allin corn borer In Chlayl Potzu Ire (1985) 35 .. ... ... 30 •.. 25 ". ! = a. .. • 20 :: 0 II -"' 0- • • -II aiD II . {! 0 z 15 10 : Temp. : No. 01 mile moths c.ptured 5 0 May June July Dlte Fig. 6. S..aonll POpUlation fluctuation of the ....I.n corn borer In Chlayl Potzu area (1991) 126
Table 6. Density of corn borer egg masses, and percent parasitism of egg masses in field corn production areas with integrated or conventional control .!I. 1985 1986 1987 1988 Control Spring crop Fall crop Spr in. crop fall crop Sprin. crop fall crop Spr in~ crop ""thod .rNa. eu .YEn ~o.••• E•• No. eu Eu !o.•u E•• ~o. eu E•• No .••• Eg No.•u Eu lasses parasitisa aasses parasit isa .asses paras it iSI . IIsses parasitisl laSses paras it iSI ..sses paruitisl lasses paras it iSI /plt (S) /plt (S) /plt (~) /plt (S) /plt (S) /plt (S) /plt (S) -------------------- Inturated!' 2.7i 18.0& 1.3& 22.0a I.Sa 10.2a 4.0 b 14.0a 1.8a 12.10 1.5. 13.4. 3.6. 26.3a Co.'entionatH 3.0. 5.0 b 1.8. 6.0 b 2.4. 2.0 b 7.8. 3.5 b 2.2. 1.5 b 2.2. 2.2 b 3.0. 6.5 b Within a column, means followed by same letter do not differ significantly at 0.05% probability level (DMRT). Four releases of T. ostriniae each 75 egg cards/ha combined with 3 insecticide treatments. Insecticide treatments applied from early whorl to pollen-shedding stage at an interval of 7-10 days. Table 7. borer }j. Grain yield of field corn with integrated or conventional control of corn 1985 1986 1987 1988 ---------------_. ----------------- ----------------- --------- Control Spring Fall Spring Fall Spring Fall Spring Average Index method crop crop crop crop crop crop crop (kg/ha) (kg/ha) (kg/ha) (kg/ha) (kg/ha) (kg/ha) (kg/ha) (kg/ha) (%) Integrated "f:../ 3,708 4,503 3,869 4,561 4,085 4,396 4,557 4,240 b 111 Conventional l/ 3,405 4,087 3,543 3,867 3,854 3,890 4,078 3,818 a 100 11 In the same column, means followed by the same letter do not differ significantly at 0.05% probability level (DMRT). ~ Sarne as in Table 6. ~ Same as in Table 6. References Awadallah, W.H. 1983. The development and vse of varietal resistance and other nonchemical control methods to reduce yield losses due to stalk borers in maize. FG-E9-170 (EG-ARS 52). Final report. Chen, K.P., and Chur L.S. 1948. The metods for artificially and massively releasing Trichogramma austra7icum Girault for controlling the sugar cane borers. Rept. of the Taiwan Sugar Res. Inst. 2: 21-36. Chona, B. JL. and M.L. Seth. 1960. A mosaic disease of maize (Zea mays L.) in India. Indian J. Agric. Sci. 30: 25-32. 127
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Proceedings of the Fifth Asian Regi
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Page Foreword List of participants
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For several years, the Asian countr
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LAOS MALAYSIA MYANMAR NEPAL PAKISTA
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Chamnan Chutkaew Dept. of Agronomy
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I t· PRIVATE PRIVATE SECTOR: SECTO
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Pioneer Overseas Corp. ProAgro Seed
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MP COP NGOs TK = Muriate of Potash.
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Table 3. Land suitability for maize
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Depending on how this wheat is rele
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Individual field sizes in the GKF a
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Table 12. Demonstration block resul
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alance of composite, synthetics and
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Elias, S.M., F.S. Sikder and J.Ahme
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~IZE ItAIMJ4ENT PRXJW4ME IN IHlf'AN
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3. Low level of soil fertility. Exp
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3. Farmers could not afford to purc
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Table 1. Hybrid maize production in
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100,000 mu (1 ha = 15 mu). Fran 198
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+ The planting area of inbred line
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ty levels. Selection interia should
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Dao13, Oa19, SSE232 etc.). b. combi
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~ZE I~ IN IN>IA - AN OVERVIEW WITH
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inbred 1ines possessing good genera
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Table 3. Details of medium and earl
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increasing the yield levels of the
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Production of ~zygous diploid inbre
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EntQllOlogical research. In the fie
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A 1) OUr coordinated efforts for ma
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Table 1. Maize area harvested, proW
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Table 4. Grain yield of Semar 1 and
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ut they have been selecting ears fr
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MAIZE ~ N«J ~ION IN LAOS. Kanyavon
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to rice in order to reach self-suff
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0\ 0\ ."'0- ~I.u'. u: 0 50 100 STAT
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. According to the findings of the
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IR:EDIIIG IHJ N:RHJotIC RESEAfDI C
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tion with estate or mini-estate typ
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Table 4. MYR grain maize yields ove
Page 82 and 83: techniques. References Anonymous. 1
Page 84 and 85: Table 1. Total area under maize and
Page 86 and 87: Year Township Area planted Total pr
Page 88 and 89: cover, short plant stature, and sat
Page 90 and 91: Table 3. Res.Stat. Multilocational
Page 92 and 93: 3. Plant protection: a. Diseases Th
Page 94 and 95: Questions to the author: FROM: S. K
Page 96 and 97: were unacceptable in some parts due
Page 98 and 99: Table 2. CCRI maize hybrid yield tr
Page 100 and 101: HYBRID MAIZE BREEDlt.G AN> ALH»DII
Page 102 and 103: of highly productive technologies,
Page 104 and 105: Maize varietal improvement continue
Page 106 and 107: Peronosc lerospora phi 1ippinensis
Page 108 and 109: elow to help clarify the farm level
Page 110 and 111: Premium Grade (emulsifiable concent
Page 112 and 113: support. The versatile planter/fert
Page 114 and 115: Table 1. Climatic conditions in the
Page 116 and 117: T1l1t:i----------------------------
Page 118 and 119: the maha season. Yala season is cha
Page 120 and 121: . Spacing Blackgram Maize 40 em x 5
Page 122 and 123: Sri Lanka. Ariyanayagam, R. P. 1967
Page 124 and 125: It took almost 10 years to develop
Page 126 and 127: g; CUS0 4 (5H 2 0): 0.39 g; NaF: 0.
Page 128 and 129: 3. Making single cnosses: Plant the
Page 130 and 131: experiments showed that the fertili
Page 134 and 135: Chang, S.C., and Y.Z. Wu. 1976. Pra
Page 136 and 137: DEVELCHENT OF HYBRID ~ IN THAILAN>
Page 138 and 139: Table 2. Quantity and value of Thai
Page 140 and 141: was approved by KU and OOA in 1991
Page 142 and 143: Table 8. Mean yields of fresh dehus
Page 144 and 145: 4. Prevention and control of aflato
Page 146 and 147: Table 17. Mean grain yield and agro
Page 148 and 149: Sittipanuwong, S., C. Chutkaew, A.
Page 150 and 151: Early rainy season plantings have a
Page 152 and 153: P. R.CHINA TMilAKD CAMPUCHiA
Page 154 and 155: In 1992, the hybrid maize acreage i
Page 156 and 157: organizing visits as well as field
Page 158 and 159: Table 1 Area, production and yield
Page 160 and 161: plants per hill) 4. Intercropping e
Page 162 and 163: VIEl1'W4 YELLOW MAIZE EXRRT: MARKET
Page 164 and 165: 6,------------------~3,5 Producllon
Page 166 and 167: MAIZE BREEDUG Arnel R. Hallauer-L!
Page 168 and 169: method was provi ded by Eberhart (1
Page 170 and 171: can vary by the complexity of inher
Page 172 and 173: Table 3. Response to selection for
Page 174 and 175: Table 5. Comparative responses for
Page 176 and 177: increased response for grain yield.
Page 178 and 179: Sure Crop (0h43 and C103). several
Page 180 and 181: Sprague and Tatum (1942) demonstrat
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Horner, E.S., E. Magloi re, and J .
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evaluation are conducted in only on
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Table 1. Maize: Production Unit 100
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Table 3. Maize: Area harvested Unit
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v) Incentives to private sector are
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possible through adoption of suitab
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will be described highlighting thos
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will fluctuate. As a general rule,
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help of maize breeders from the nat
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Table 4. Possible heterotic partner
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use as OPVs and broad based synthet
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c. Integrat;on of populat;on ;mprov
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Table 8. Announced CIMMYT lines 199
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HYBRID MAIZE ~ 1l£ SMALL-SCALE FNI
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Table 2. Growth rate of maize area
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At the same time that CIMMYT was sh
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when grown under farmers' condition
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seed often varies substantially bec
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kilograms of maize grain that must
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Table 8. COst of producing, process
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case in which the hybrid replaces a
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J i-----1'-_.,-_I........ i M*iIBia
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egions which do not allow a suffici
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participation; where foreign compan
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Wellhausen, E.J. Walden (ed.) 1978.
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To recover value, seed companies ca
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In recent years, many new companies
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nology and its reliance on patents,
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Table 6. Intellectual property righ
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for crop improvement programs. It i
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capabi 1ities Despite these constra
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TftNlAlll CAMPUCI-1iA Fig. 1. Seven
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* Yield potential of 8.0 t/ha. II.
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CAOOILL MAIZE RESEAFDI ACTIVITIES I
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RESEARCH AN> POTENTIAL OF HYBRID (X
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ClBA SEEDS IN SJJ11£AST ASIA. Jose
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ACTIVIlY OF MAHYOO IN INJIA Rajendr
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PACIFIC SEEDS - PlANT ~ FOO ASIA Pe
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Questions to the author: FROM: R. S
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Just start In 1980 the demonstratio
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VOLUME 1000 IQnt/ 10.--------------
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(Notes by Dr. V.L. Chidley, Raporte
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1. Rhizoctonia leaf and sheath blig
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