② The dry matter degradability (DMD 48) of cotton leaf, small stem at 1/3 section of cotton straw and cotton peach hull at 48h is 65.47%, 36.66% and 31.32% respectively, this showed that cotton leaf was more digestible than that of cotton peach hull and small stem at 1/3 section of cotton straw.
Results also demonstrated that spinosad residues in the cotton leaf and cotton soil dissipated rapidly, spinosyn A had half life of 3.01 in the cotton leaf, 2.18 in the cotton soil, spinosyn D had half life of 1.96 in the cotton leaf, 2.29 in the cotton soil.
High quality RNA from cotton fiber and other tissue cells were obtained by using this isolation method, for example, the fiber cell RNA can reach 1.85 of the 260/280 ratio with the yield of 0.65 mg·g 1 and the cotton leaf RNA 2.02 with 6.35 mg·g 1 .It was this method that RNA isolated from cotton tissues, especially from fiber cells, were suitable for the experiments of RT PCR and Northern blot hybridization.
On the condition of complementary nutrition at the adult stage, the average egg numbers oviposited by one female of cotton bollworm which fed cotton leaf, cotton boll and artificial diet at. larval stage were 565.2, 1005.8and 1052.2, respectively.
Reflectance spectrum and the first derivative spectrum respond to chlorophyll content of cotton, extracting the information of chlorophyll density of cotton canopy , it can indirectly monitor the nutrition state of the cotton leaf nitrogen accumulation .
There is a little DMAH accumulation in the cotton leaf and root, and it as-sumes a rising trend as the concentration rising. The accmulation of the 100 times obviously1s 5.05mg/kg,the others are below 0.7mg/kg.
This paper compared five DNA extraction methods of cotton leaf curl virus (CI.CuV) t'rom inlbcted cotton leaves for PCR detection and southern blot hybridization.
Recently, Ageratum yellow vein virus (AYVV) and Cotton leaf curl Multan virus (CLCuMV) were found to be associated with satellite DNAβ as well as a nanovirus-like small DNA component, referred to as DNA1. DNA1 is distributing widely but its function is not clear.
Spraying 200 μl of RH-2485 (25, 50, 100, 150 mg/L) on 5 cm cotton leaf with 15 heads of the 2nd instar larvae, double sides, caused precocious incomplete molt from 43.6% to 94.9% .
3) The correlation degree between cotton leaf cellulose containment and reflectance reaches 0.05 significant level only in blue and red range. Set models with 37 modeling samples and 16 test samples, y = 0.39578-0.49776e~(-R429/R743/0.13036) is chosen as regression model.
NO symptom of disease appeared by using EaNPV of 1×l07/ml and PIB of 1×108/ml to infect cabbage worm, army worm, corn borer, cotton leaf roller, Gastropacha Populifolia Esper and the larvae of Brachy-meria agonoxenae Fullaway.
The complete nucleotide sequence of the DNA-A molecule of the present isolate was 2728 nucleotides in length, having the highest sequence identity (83.5%) with an Indian begomovirus causing cotton leaf curl disease.
The injurious insects of cotton of this province, however, have not hithertobeen carefully studied, especially the pink bollworm, which annually reducesthe cotton production by 10 to 30 per cent. The present authors spent twoyears in observing the life history and habits of this insect, in attempting tofind some effective control measures. The result is herewith summarized :- 1. In the vicinity of Wu-chang, the pink bollworm has three generationsa year. The first generation occupies May and July...
It is known that treatment with boron may to a certain extent reduce the percentage of boll shedding in cotton plant. It is also known that boron plays a special role in carbohydrate metabolism of the plants in general. The present work attempted to elucidate the effect of boron treatment on the translocation and metabolism of carbohydrates in cotton plant. The first internode of the fourth to the sixth fruiting branch of field grown cotton plant was chosen as experimental material. Only o...
The regresive linear equation of the mortality of Erannis ankeraria Stardinger infected with Ea NPV is y = 1.9621 + 0. 5056 × LD50= 106.01 ; laval mortality increased with the increase of days of infection within a certain period of time ; LT50 decreased with the increase of infective concentration; the toxicity of EaNPV reduced gradually with the prolongation of its storage: the toxicity of 24 month. storage EaNPV decreased by 36.5-58.5% compared with that of 11 month-storage EaNPV. The degree of destructi...