Whereas the boll rot
analysis of NIAB-2008 showed the disease incidence of 2.8% compared to SLH-334 (3.1%), FH-4243 (3.5%), CIM-573 (2.4%), GS-321(5.6%), CRIS-486(4.7%), RH-625(3.0%) and MNH-786 (3.5%).
Excessive rainfall resulted in substantial boll rot
, particularly toward the base of the plant leaving plants containing the induced fruiting gap in the middle of the plant completely devoid of fruit with the exception of the uppermost portion of the plants.
However, a high incidence of boll rot
was generally observed in Test 3 regardless of treatment (no data collected).
A new fungus associated with boll rot of arboreum cotton.
Fusarium boll rot of cotton: pathogenicity and histopathology.
During the fall harvest, however, rainy weather led to widespread boll rot
This resulted in flooding and substantial boll rot
, confounding yield data in this year.
Bolls damaged by insects or boll rot
were not used for determination of boll weight, but were considered to be retained bolls that competed with neighboring bolls.
The okra and subokra leaf shape characters improve penetration of sunlight and pesticides into the canopy, which should improve pest control and reduce boll rot
In the past, acceptance of the UNRC system was limited due to the lack of an effective over-the-top herbicide, as well as to increased presence of boll rot
due to excess vegetative growth (Wannamaker, 1971).
Other agronomic and morphologic characteristics that are different in okra-leaf cotton are less boll rot (Andries et al., 1969; Jones, 1982), reduced leaf area index (LAI) and higher canopy [CO.sub.2]-uptake per unit leaf area (Kerby et al., 1980), higher light-saturated, single-leaf photosynthesis per unit leaf area (Pettigrew et al., 1993), a shorter sympodial plastochron (Kerby and Buxton, 1978), increased numbers of flowers per season (Wells and Meredith, 1986), better pesticide penetration (James and Jones, 1985), and moderate pink bollworm [Pectinophora gossypielta (Saunders)] resistance (Wilson, 1990).
Greater flower production, insect resistance, better insecticide penetration, and reduced incidence of boll rot are further reasons to pursue development of okra-leaf types.