Glasshouse studies were made on honeydew production, adult and nymphal body weight gain, fecundity and size of egg groups of brown planthopper Nilaparvata lugens (Stål) (Homoptera: Delphacidae) (BPH) on CVS TN1, ASD7, Babawee, Mudgo, Rathu‐Heenati and Ptb33 rice plants with watering regimes of 10 ml, 20 ml, 30 ml and excess water daily. Honeydew production, weight gain, fecundity and size of egg groups were greatest on TN1, followed by ASD7. BPH did less well on Babawee, Mudgo and Rathu‐Heenati and they did worst on Ptb33. Watering regimes greatly affected performance, with significantly less honeydew, less weight gain, lower fecundity and smaller egg groups on plants with 10 ml water daily than on plants with excess water. The 20 ml and 30 ml watering regimes also significantly reduced honeydew production on TN1 and ASD7 and fecundity and weight gain of adults and nymphs on Mudgo. On Babawee adults gained most weight on the 20 ml and 30 ml treatments, and nymphs gained most weight on the 30 ml treatment. BPH laid most eggs on TN1, ASD7, Babawee and Rathu‐Heenati when plants were given 30 ml water daily.
An experiment was conducted for a period of 5 weeks with 240 day-old cobb-500 broiler chicks and were allocated into six dietary treatments with isocaloric and isonitrogenous containing 2975 Kcal ME/kg DM & 21.70% CP and 3077 Kcal ME/kg DM & 20.34% CP both starter and finisher ration respectively. There were 40 chicks per treatment, each treatment had 4 replication having 10 chicks in each. The dietary treatments were T1 (0% triticale + 100% maize), T2 (20% triticale + 80% maize), T3 (40% triticale + 60% maize), T4 (60% triticale + 40% maize), T5 (80% triticale + 20% maize) and T6 (100% triticale + 0% maize). The broilers of all treatment groups were supplied feeds and water ad libitum throughout the experimental period. There were no significant differences (P>0.05) in feed intake, final body weight, total gain, feed conversion efficiency, survivability% but feed cost per kg live broiler production was differed significantly (P<0.01) among dietary treatments at 35 days of age. Therefore, it is clear that triticale is a good alternative cereal for broiler diet without affecting performance and it may safely replace up to 100% of maize but 40% replacement enhance production performance and edible meat yield of broiler and reducing feed cost (Tk. 2.88/kg) per unit of broiler production.
Host preference, honeydew production, fecundity and size of egg groups of brown planthopper Nilaparvata lugens (BPH) were studied on 30‐, 60‐ and 90‐day‐old rice plants of cultivars TN1, ASD7, Mudgo, Babawee, Rathu‐Heenati and Ptb33. BPH preferred to infest TN1 and ASD7 to Babawee and Mudgo, while Rathu‐Heenati and Ptb33 were non‐preferred. In general, plant age within a cultivar did not affect BPH preference, but on Babawee it settled more on 90‐day‐old plants than on 30‐ or 60‐day‐old ones. Honeydew output was high on TN1 and ASD7 and low on Ptb33. On TN1, ASD7 and Mudgo it was lower on 90‐day‐old than on younger plants, but on Babawee the output was highest on the oldest plants. Over 24 h most eggs were laid on TN1, but there were no differences in egg laying between other cultivars, or between plants of different ages within individual cultivars. Lifetime fecundity was highest on TN1 and low on Ptb33 and Rathu‐Heenati. On TN1 and Mudgo fecundity was lowest on 90‐day‐old plants, but on Babawee it was highest on 90‐day‐old plants. Plant age did not affect the number of eggs laid on other cultivars. The size of egg groups declined in the order TN1, ASD7, Mudgo, Babawee, Rathu‐Heenati and Ptb33, but it was not affected by plant age. Zusammenfassung Zum Einfluß des Pflanzenalters auf die Wirtspräferenz, die Honigtauproduktion und die Fekundität von Nilaparvata lugens (Stål) (Hom., Delphacidae) in Reiskulturen An 30, 60 und 90 Tage alten Reispflanzen (TN1, ASD7, Mudgo, Babawee, Rathu‐Heenati und Ptb33) wurden Wirtspräferenz, Honigtauproduktion, Fekundität und Größe der Eigelege von Nilaparvata lugens untersucht. N. lugens bevorzugte TN1 und ASD7 gegenüber Babawee und Mudgo, während Rathu‐Heenati und Ptb33 nicht zu den bevorzugten Sorten zählten. Im allgemeinen beeinflußte das Pflanzenalter nicht die Akzeptanz einer Reissorte, aber bei Babawee wurden die ältesten Pflanzen bevorzugt. Auf TN1 und ASD7 wurde eine hohe Honigtauproduktion festgestellt, auf Ptb33 eine niedrige. Bei den Sorten TN1, ASD7 und Mudgo war die Honigtauproduktion bei den älteren Pflanzen geringer als bei den jüngeren, bei Babawee war es umgekehrt. Auf TN1 wurden innerhalb von 24 h die meisten Eier abgelegt; zwischen den anderen Sorten konnte diesbezüglich kein Unterschied festgestellt werden. Auch das Alter der Pflanzen hatte keinen Einfluß auf die Eiablage. Die Gesamtfekundität war auf TN1 am höchsten und auf Ptb33 und Rathu‐Heenati am niedrigsten. Das Pflanzenalter beeinflußte nur bei einzelnen Sorten die Gesamtfekundität. Die Größe der Eigelege war abhängig von der Sorte, nicht aber vom Alter der Reispflanzen.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.